Update changelog

Co-authored-by: Jeremy Denoun <jeremy.denoun@iguanesolutions.com>

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every weekday
+      interval: "daily"

.github/workflows/compile-manual.yml

@@ -0,0 +1,17 @@
+---
+name: Compile debian man
+on:
+  - push
+jobs:
+  compile-debian-man:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Produce debian man
+        run: 'docker run --rm --volume "`pwd`:/data" --user `id -u`:`id -g` pandoc/latex:2.6 MANUAL.md -s -t man > debian/cis-hardening.8'
+      - uses: EndBug/add-and-commit@v7
+        with:
+          add: 'debian/cis-hardening.8'
+          message: 'Regenerate man pages (Github action)'
+          token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/functionnal-tests.yml

@@ -0,0 +1,27 @@
+---
+name: Run functionnal tests
+on:
+  - pull_request
+  - push
+jobs:
+  functionnal-tests-docker-debian9:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Run the tests debian9
+        run: ./tests/docker_build_and_run_tests.sh debian9
+  functionnal-tests-docker-debian10:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Run the tests debian10
+        run: ./tests/docker_build_and_run_tests.sh debian10
+  functionnal-tests-docker-debian11:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Run the tests debian11
+        run: ./tests/docker_build_and_run_tests.sh debian11

.github/workflows/pre-release.yml

@@ -0,0 +1,64 @@
+---
+name: Create Pre-Release
+on:
+  push:
+    branches:
+      - master
+jobs:
+  build:
+    name: Create Pre-Release
+    runs-on: ubuntu-latest
+    steps:
+      # CHECKOUT CODE
+      - name: Checkout code
+        uses: actions/checkout@v2
+      # BUILD THE .DEB PACKAGE
+      - name: Build
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential devscripts debhelper
+          sudo debuild --buildinfo-option=-O -us -uc -b -j8
+          find ../ -name "*.deb" -exec mv {} cis-hardening.deb \;
+      # DELETE THE TAG NAMED LATEST AND THE CORRESPONDING RELEASE
+      - name: Delete the tag latest and the release latest
+        uses: dev-drprasad/delete-tag-and-release@v0.1.3
+        with:
+          delete_release: true
+          tag_name: latest
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      # GET LATEST VERSION TAG
+      - name: Get latest version tag
+        uses: actions-ecosystem/action-get-latest-tag@v1
+        id: get-latest-tag
+      # GENERATE CHANGELOG CORRESPONDING TO COMMIT BETWEEN HEAD AND COMPUTED LAST TAG
+      - name: Generate changelog
+        id: changelog
+        uses: metcalfc/changelog-generator@v0.4.4
+        with:
+          myToken: ${{ secrets.GITHUB_TOKEN }}
+          head-ref: ${{ github.sha }}
+          base-ref: ${{ steps.get-latest-tag.outputs.tag }}
+      # CREATE RELEASE NAMED LATEST
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1.1.4
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: latest
+          release_name: Pre-release
+          body: ${{ steps.changelog.outputs.changelog }}
+          draft: false
+          prerelease: true
+      # UPLOAD PACKAGE .DEB
+      - name: Upload Release deb
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./cis-hardening.deb
+          asset_name: cis-hardening.deb
+          asset_content_type: application/vnd.debian.binary-package

.github/workflows/shellcheck_and_shellfmt.yml

@@ -0,0 +1,29 @@
+---
+name: Run shell-linter
+on:
+  - push
+  - pull_request
+jobs:
+  shellfmt:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Run the sh-checker
+        uses: luizm/action-sh-checker@v0.1.12
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Optional if sh_checker_comment is false.
+          SHFMT_OPTS: -l -i 4 -w # Optional: pass arguments to shfmt.
+        with:
+          sh_checker_shellcheck_disable: true
+          sh_checker_comment: true
+          sh_checker_exclude: |
+                              src/
+                              debian/postrm
+  shellcheck:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Run shellcheck
+        run: ./shellcheck/docker_build_and_run_shellcheck.sh

.github/workflows/tagged-release.yml

@@ -0,0 +1,66 @@
+---
+name: Create Release
+on:
+  push:
+    tags:
+      - 'v*'
+jobs:
+  build:
+    name: Create Release
+    # only runs on master
+    if: github.event.base_ref == 'refs/heads/master'
+    runs-on: ubuntu-latest
+    steps:
+      # GET VERSION TAG
+      - name: Get latest version number
+        id: vars
+        run: echo ::set-output name=tag::${GITHUB_REF#refs/*/}
+      # CHECKOUT CODE
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ steps.vars.outputs.tag }}
+      # GENERATE CHANGELOG CORRESPONDING TO ENTRY IN DEBIAN/CHANGELOG
+      - name: Generate changelog
+        run: sed -n -e "/cis-hardening ($(echo ${{ steps.vars.outputs.tag }} | tr -d 'v'))/,/ -- / p" debian/changelog | tail -n +3 | head -n -2 > changelog.md
+      # IF THERE IS A NEW TAG BUT NO CORRESPONDING ENTRY IN DEBIAN/CHANGELOG, SET JOB TO FAIL
+      - name: Abort if changelog is empty
+        run: '[ -s changelog.md ] || (echo "No entry corresponding to the specified version found in debian/changelog"; exit 1)'
+      # BUILD THE .DEB PACKAGE
+      - name: Build
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential devscripts debhelper
+          sudo debuild --buildinfo-option=-O -us -uc -b -j8
+          find ../ -name "*.deb" -exec mv {} cis-hardening.deb \;
+      # DELETE THE TAG NAMED LATEST AND THE CORRESPONDING RELEASE
+      - name: Delete the tag latest and the release latest
+        uses: dev-drprasad/delete-tag-and-release@v0.1.3
+        with:
+          delete_release: true
+          tag_name: latest
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      # CREATE RELEASE
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          body_path: changelog.md
+          draft: false
+          prerelease: false
+      # UPLOAD PACKAGE .DEB
+      - name: Upload Release deb
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./cis-hardening.deb
+          asset_name: cis-hardening-${{ steps.vars.outputs.tag }}.deb
+          asset_content_type: application/vnd.debian.binary-package

.gitignore

@@ -0,0 +1 @@
+tmp/shfmt

AUTHORS

@@ -1,8 +1,9 @@
 Contributors of this project :
 
 Developers :
-    Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
+    Thibault Dewailly, OVHcloud <thibault.dewailly@ovhcloud.com>
-    Stéphane Lesimple, OVH <stephane.lesimple@corp.ovh.com>
+    Stéphane Lesimple, OVHcloud <stephane.lesimple@ovhcloud.com>
+    Thibault Ayanides, OVHcloud <thibault.ayanides@ovhcloud.com>
 
 Debian package maintainers :
-    Kevin Tanguy, OVH <kevin.tanguy@corp.ovh.com>
+    Kevin Tanguy, OVHcloud <kevin.tanguy@ovhcloud.com>

LICENSE

@@ -1,25 +1,192 @@
-Copyright (c) 2016, OVH SAS.
+Copyright 2020 OVHcloud
-All rights reserved.
 
-Redistribution and use in source and binary forms, with or without
+   Licensed under the Apache License, Version 2.0 (the "License");
-modification, are permitted provided that the following conditions are met:
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
 
-  * Redistributions of source code must retain the above copyright
+       http://www.apache.org/licenses/LICENSE-2.0
-    notice, this list of conditions and the following disclaimer.
-  * Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the
-    documentation and/or other materials provided with the distribution.
-  * Neither the name of OVH SAS nor the
-    names of its contributors may be used to endorse or promote products
-    derived from this software without specific prior written permission.
 
-THIS SOFTWARE IS PROVIDED BY OVH SAS AND CONTRIBUTORS ``AS IS'' AND ANY
+   Unless required by applicable law or agreed to in writing, software
-EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+   distributed under the License is distributed on an "AS IS" BASIS,
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-DISCLAIMED. IN NO EVENT SHALL OVH SAS AND CONTRIBUTORS BE LIABLE FOR ANY
+   See the License for the specific language governing permissions and
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+   limitations under the License.
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+   A copy of the license terms follows:
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+
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+                                 Apache License
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MANUAL.md

@@ -0,0 +1,160 @@
+% CIS-HARDENING(8)
+%
+% 2016
+
+# NAME
+
+cis-hardening - CIS Debian 9/10 Hardening
+
+# SYNOPSIS
+
+**hardening.sh** RUN_MODE [OPTIONS]
+
+# DESCRIPTION
+
+Modular Debian 9/10 security hardening scripts based on the CIS (https://www.cisecurity.org) recommendations.
+
+We use it at OVHcloud (https://www.ovhcloud.com) to harden our PCI-DSS infrastructure.
+
+# SCRIPTS CONFIGURATION
+
+Hardening scripts are in `bin/hardening`. Each script has a corresponding
+configuration file in `etc/conf.d/[script_name].cfg`.
+
+Each hardening script can be individually enabled from its configuration file.
+For example, this is the default configuration file for `disable_system_accounts`:
+
+```
+# Configuration for script of same name
+status=disabled
+# Put here your exceptions concerning admin accounts shells separated by spaces
+EXCEPTIONS=""
+```
+
+**status** parameter may take 3 values:
+
+- `disabled` (do nothing): The script will not run.
+- `audit` (RO): The script will check if any change should be applied.
+- `enabled` (RW): The script will check if any change should be done and automatically apply what it can.
+
+Global configuration is in `etc/hardening.cfg`. This file controls the log level
+as well as the backup directory. Whenever a script is instructed to edit a file, it
+will create a timestamped backup in this directory.
+
+
+# RUN MODE
+
+`-h`, `--help`
+:   Display a friendly help message.
+
+`--apply`
+:   Apply hardening for enabled scripts.
+    Beware that NO confirmation is asked whatsoever, which is why you're warmly
+    advised to use `--audit` before, which can be regarded as a dry-run mode.
+
+`--audit`
+:   Audit configuration for enabled scripts.
+    No modification will be made on the system, we'll only report on your system
+    compliance for each script.
+
+`--audit-all`
+:   Same as `--audit`, but for *all* scripts, even disabled ones.
+    This is a good way to peek at your compliance level if all scripts were enabled,
+    and might be a good starting point.
+
+`--audit-all-enable-passed`
+:   Same as `--audit-all`, but in addition, will *modify* the individual scripts
+    configurations to enable those which passed for your system.
+    This is an easy way to enable scripts for which you're already compliant.
+    However, please always review each activated script afterwards, this option
+    should only be regarded as a way to kickstart a configuration from scratch.
+    Don't run this if you have already customized the scripts enable/disable
+    configurations, obviously.
+
+`--create-config-files-only`
+:   Create the config files in etc/conf.d
+    Must be run as root, before running the audit with user secaudit
+
+`-set-hardening-level=level`
+:   Modifies the configuration to enable/disable tests given an hardening level,
+    between 1 to 5. Don't run this if you have already customized the scripts
+    enable/disable configurations.
+    1: very basic policy, failure to pass tests at this level indicates severe
+        misconfiguration of the machine that can have a huge security impact
+    2: basic policy, some good practice rules that, once applied, shouldn't
+        break anything on most systems
+    3: best practices policy, passing all tests might need some configuration
+        modifications (such as specific partitioning, etc.)
+    4: high security policy, passing all tests might be time-consuming and
+        require high adaptation of your workflow
+    5: placebo, policy rules that might be very difficult to apply and maintain,
+        with questionable security benefits
+
+`--allow-service=service`
+:   Use with `--set-hardening-level`.
+    Modifies the policy to allow a certain kind of services on the machine, such
+    as http, mail, etc. Can be specified multiple times to allow multiple services.
+    Use --allow-service-list to get a list of supported services.
+
+# OPTIONS
+
+`--allow-service-list`
+:   Get a list of supported service.
+
+  
+`--only test-number`
+:    Modifies the RUN_MODE to only work on the test_number script.
+    Can be specified multiple times to work only on several scripts.
+    The test number is the numbered prefix of the script,
+    i.e. the test number of 1.2_script_name.sh is 1.2.
+
+`--sudo`
+:   This option lets you audit your system as a normal user, but allows sudo
+    escalation to gain read-only access to root files. Note that you need to
+    provide a sudoers file with NOPASSWD option in /etc/sudoers.d/ because
+    the -n option instructs sudo not to prompt for a password.
+    Finally note that `--sudo` mode only works for audit mode.
+
+`--set-log-level=level`
+:   This option sets LOGLEVEL, you can choose : info, warning, error, ok, debug.
+    Default value is : info
+
+`--batch`
+:   While performing system audit, this option sets LOGLEVEL to 'ok' and
+    captures all output to print only one line once the check is done, formatted like :
+    OK|KO OK|KO|WARN{subcheck results} [OK|KO|WARN{...}]
+
+`--allow-unsupported-distribution`
+    Must be specified manually in the command line to allow the run on non compatible
+    version or distribution. If you want to mute the warning change the LOGLEVEL
+    in /etc/hardening.cfg
+
+
+# AUTHORS
+
+- Thibault Dewailly, OVHcloud <thibault.dewailly@ovhcloud.com>
+- Stéphane Lesimple, OVHcloud <stephane.lesimple@ovhcloud.com>
+- Thibault Ayanides, OVHcloud <thibault.ayanides@ovhcloud.com>
+- Kevin Tanguy, OVHcloud <kevin.tanguy@ovhcloud.com>
+
+# COPYRIGHT
+
+Copyright 2020 OVHcloud
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+# SEE ALSO
+
+- **Center for Internet Security**: https://www.cisecurity.org/
+- **CIS recommendations**: https://learn.cisecurity.org/benchmarks
+- **Project repository**: https://github.com/ovh/debian-cis
+

README.md

@@ -1,44 +1,60 @@
-# CIS Debian 7/8/9 Hardening
+# :lock: CIS Debian 9/10 Hardening
 
-Modular Debian 7/8/9 security hardening scripts based on [cisecurity.org](https://www.cisecurity.org)
+:tada: **News**: this projet is back in the game and is from now on maintained. Be free to use and to
-recommendations. We use it at [OVH](https://www.ovh.com) to harden our PCI-DSS infrastructure.
+report issues if you find any !
+
+
+<p align="center">
+      <img src="https://repository-images.githubusercontent.com/56690366/bbe7c380-55b2-11eb-84ba-d06bf153fe8b" width="300px">
+</p>
+
+![Shell-linter](https://github.com/ovh/debian-cis/workflows/Run%20shell-linter/badge.svg)
+![Functionnal tests](https://github.com/ovh/debian-cis/workflows/Run%20functionnal%20tests/badge.svg)
+![Release](https://github.com/ovh/debian-cis/workflows/Create%20Release/badge.svg)
+
+![Realease](https://img.shields.io/github/v/release/ovh/debian-cis)
+![License](https://img.shields.io/github/license/ovh/debian-cis)
+---
+
+Modular Debian 9/10 security hardening scripts based on [cisecurity.org](https://www.cisecurity.org)
+recommendations. We use it at [OVHcloud](https://www.ovhcloud.com) to harden our PCI-DSS infrastructure.
 
 ```console
 $ bin/hardening.sh --audit-all
 [...]
-hardening [INFO] Treating /opt/cis-hardening/bin/hardening/13.15_check_duplicate_gid.sh
+hardening [INFO] Treating /opt/cis-hardening/bin/hardening/6.2.19_check_duplicate_groupname.sh
-13.15_check_duplicate_gid [INFO] Working on 13.15_check_duplicate_gid
+6.2.19_check_duplicate_gr [INFO] Working on 6.2.19_check_duplicate_groupname
-13.15_check_duplicate_gid [INFO] Checking Configuration
+6.2.19_check_duplicate_gr [INFO] Checking Configuration
-13.15_check_duplicate_gid [INFO] Performing audit
+6.2.19_check_duplicate_gr [INFO] Performing audit
-13.15_check_duplicate_gid [ OK ] No duplicate GIDs
+6.2.19_check_duplicate_gr [ OK ] No duplicate GIDs
-13.15_check_duplicate_gid [ OK ] Check Passed
+6.2.19_check_duplicate_gr [ OK ] Check Passed
 [...]
 ################### SUMMARY ###################
-      Total Available Checks : 191
+      Total Available Checks : 232
-         Total Runned Checks : 191
+         Total Runned Checks : 166
-         Total Passed Checks : [ 170/191 ]
+         Total Passed Checks : [ 142/166 ]
-         Total Failed Checks : [  21/191 ]
+         Total Failed Checks : [  24/166 ]
-   Enabled Checks Percentage : 100.00 %
+   Enabled Checks Percentage : 71.00 %
-       Conformity Percentage : 89.01 %
+       Conformity Percentage : 85.00 %
 ```
 
-## Quickstart
+## :dizzy: Quickstart
 
 ```console
 $ git clone https://github.com/ovh/debian-cis.git && cd debian-cis
 $ cp debian/default /etc/default/cis-hardening
 $ sed -i "s#CIS_ROOT_DIR=.*#CIS_ROOT_DIR='$(pwd)'#" /etc/default/cis-hardening
-$ bin/hardening/1.1_install_updates.sh --audit-all
+$ bin/hardening/1.1.1.1_disable_freevxfs.sh --audit-all
-1.1_install_updates [INFO] Working on 1.1_install_updates
+hardening                 [INFO] Treating /opt/cis-hardening/bin/hardening/1.1.1.1_disable_freevxfs.sh
-1.1_install_updates [INFO] Checking Configuration
+1.1.1.1_disable_freevxfs  [INFO] Working on 1.1.1.1_disable_freevxfs
-1.1_install_updates [INFO] Performing audit
+1.1.1.1_disable_freevxfs  [INFO] [DESCRIPTION] Disable mounting of freevxfs filesystems.
-1.1_install_updates [INFO] Checking if apt needs an update
+1.1.1.1_disable_freevxfs  [INFO] Checking Configuration
-1.1_install_updates [INFO] Fetching upgrades ...
+1.1.1.1_disable_freevxfs  [INFO] Performing audit
-1.1_install_updates [ OK ] No upgrades available
+1.1.1.1_disable_freevxfs  [ OK ] CONFIG_VXFS_FS is disabled
-1.1_install_updates [ OK ] Check Passed
+1.1.1.1_disable_freevxfs  [ OK ] Check Passed
 ```
 
-## Usage
+## :hammer: Usage
 
 ### Configuration
 
@@ -72,7 +88,9 @@ This command has 2 main operation modes:
 - ``--audit``: Audit your system with all enabled and audit mode scripts
 - ``--apply``: Audit your system with all enabled and audit mode scripts and apply changes for enabled scripts
 
-Additionally, ``--audit-all`` can be used to force running all auditing scripts,
+Additionally, some options add more granularity:
+
+ ``--audit-all`` can be used to force running all auditing scripts,
 including disabled ones. this will *not* change the system.
 
 ``--audit-all-enable-passed`` can be used as a quick way to kickstart your
@@ -80,16 +98,36 @@ configuration. It will run all scripts in audit mode. If a script passes,
 it will automatically be enabled for future runs. Do NOT use this option
 if you have already started to customize your configuration.
 
-``--sudo``: Audit your system as a normal user, but allow sudo escalation to read
+``--sudo``: audit your system as a normal user, but allow sudo escalation to read
 specific root read-only files. You need to provide a sudoers file in /etc/sudoers.d/
 with NOPASWD option, since checks are executed with ``sudo -n`` option, that will
 not prompt for a password.
 
-``--batch``: While performing system audit, this option sets LOGLEVEL to 'ok' and
+``--batch``: while performing system audit, this option sets LOGLEVEL to 'ok' and
 captures all output to print only one line once the check is done, formatted like :
 OK|KO OK|KO|WARN{subcheck results} [OK|KO|WARN{...}]
 
-## Hacking
+``--only <check_number>``: run only the selected checks.
+
+``--set-hardening-level``: run all checks that are lower or equal to the selected level.
+Do NOT use this option if you have already started to customize your configuration.
+
+``--allow-service <service>``: use with --set-hardening-level. Modifies the policy 
+to allow a certain kind of services on the machine, such as http, mail, etc.
+Can be specified multiple times to allow multiple services.
+Use --allow-service-list to get a list of supported services.
+
+``--set-log-level <level>``: This option sets LOGLEVEL, you can choose : info, warning, error, ok, debug.
+Default value is : info
+
+``--create-config-files-only``: create the config files in etc/conf.d. Must be run as root,
+before running the audit with user secaudit, to have the rights setup well on the conf files.
+
+``--allow-unsupported-distribution``: must be specified manually in the command line to allow 
+the run on non compatible version or distribution. If you want to mute the warning change the
+LOGLEVEL in /etc/hardening.cfg
+
+## :computer: Hacking
 
 **Getting the source**
 
@@ -110,6 +148,15 @@ $ cp src/skel bin/hardening/99.99_custom_script.sh
 $ chmod +x bin/hardening/99.99_custom_script.sh
 $ cp src/skel.cfg etc/conf.d/99.99_custom_script.cfg
 ```
+Every custom check numerotation begins with 99. The numbering after it depends on the section the check refers to.
+
+If the check replace somehow one that is in the CIS specifications,
+you can use the numerotation of the check it replaces inplace. For example we check
+the config of OSSEC (file integrity) in `1.4.x` whereas CIS recommends AIDE.
+
+Do not forget to specify in comment if it's a bonus check (suggested by CIS but not in the CIS numerotation), a legacy check (part from previous CIS specification but deleted in more recents one) or an OVHcloud security check.
+(part of OVHcloud security policy)
+
 
 Code your check explaining what it does then if you want to test
 
@@ -117,7 +164,7 @@ Code your check explaining what it does then if you want to test
 $ sed -i "s/status=.+/status=enabled/" etc/conf.d/99.99_custom_script.cfg
 $ ./bin/hardening/99.99_custom_script.sh
 ```
-## Functional testing
+## :sparkles: Functional testing
 
 Functional tests are available. They are to be run in a Docker environment.
 
@@ -125,7 +172,7 @@ Functional tests are available. They are to be run in a Docker environment.
 $ ./tests/docker_build_and_run_tests.sh <target> [name of test script...]
 ```
 
-With `target` being like `debian8` or `debian9`.
+With `target` being like `debian9` or `debian10`.
 
 Running without script arguments will run all tests in `./tests/hardening/` directory.
 Or you can specify one or several test script to be run.
@@ -151,10 +198,49 @@ Functional tests can make use of the following helper functions :
 In order to write your own functional test, you will find a code skeleton in
 `./src/skel.test`.
 
-## Disclaimer
+Some tests ar labelled with a disclaimer warning that we only test on a blank host
+and that we will not test the apply function. It's because the check is very basic
+(like a package install) and that a test on it is not really necessary.
+
+Furthermore, some tests are disabled on docker because there not pertinent (kernel 
+modules, grub, partitions, ...)
+You can disable a check on docker with:
+```bash
+if [ -f "/.dockerenv" ]; then
+  skip "SKIPPED on docker"
+else
+...
+fi
+```
+
+## :art: Coding style
+### Shellcheck
+
+We use [Shellcheck](https://github.com/koalaman/shellcheck) to check the 
+correctness of the scripts and to respect best practices.
+It can be used directly with the docker environnment to check all scripts 
+compliancy. By default it runs on every `.sh` it founds.
+
+```console
+$ ./shellcheck/launch_shellcheck.sh [name of script...]
+```
+
+### Shellfmt
+
+We use [Shellfmt](https://github.com/mvdan/sh) to check the styling and to keep a 
+consistent style in every script. 
+Identically to shellcheck, it can be run through a script with the following:
+
+```console
+$ ./shellfmt/launch_shellfmt.sh
+```
+It will automatically fix any styling problem on every script.
+
+
+## :heavy_exclamation_mark: Disclaimer
 
 This project is a set of tools. They are meant to help the system administrator
-built a secure environment. While we use it at OVH to harden our PCI-DSS compliant
+built a secure environment. While we use it at OVHcloud to harden our PCI-DSS compliant
 infrastructure, we can not guarantee that it will work for you. It will not
 magically secure any random host.
 
@@ -163,7 +249,7 @@ Additionally, quoting the License:
 > THIS SOFTWARE IS PROVIDED BY OVH SAS AND CONTRIBUTORS ``AS IS'' AND ANY
 > EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 > WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-> DISCLAIMED. IN NO EVENT SHALL OVH SAS AND CONTRIBUTORS BE LIABLE FOR ANY
+> DISCLAIMED. IN NO EVENT SHALL OVHcloud SAS AND CONTRIBUTORS BE LIABLE FOR ANY
 > DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 > (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 > LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
@@ -171,13 +257,11 @@ Additionally, quoting the License:
 > (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 > SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-## Reference
+## :satellite: Reference
 
 - **Center for Internet Security**: https://www.cisecurity.org/
-- **CIS recommendations**: https://benchmarks.cisecurity.org/downloads/show-single/index.cfm?file=debian7.100
+- **CIS recommendations**: https://learn.cisecurity.org/benchmarks
-- **CIS recommendations**: https://benchmarks.cisecurity.org/downloads/show-single/index.cfm?file=debian8.100
 
-## License
+## :page_facing_up: License
-
-3-Clause BSD
 
+Apache, Version 2.0

bin/hardening.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 # Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
@@ -9,7 +10,7 @@
 # Main script : Execute hardening considering configuration
 #
 
-LONG_SCRIPT_NAME=$(basename $0)
+LONG_SCRIPT_NAME=$(basename "$0")
 SCRIPT_NAME=${LONG_SCRIPT_NAME%.sh}
 DISABLED_CHECKS=0
 PASSED_CHECKS=0
@@ -20,13 +21,16 @@ AUDIT=0
 APPLY=0
 AUDIT_ALL=0
 AUDIT_ALL_ENABLE_PASSED=0
+CREATE_CONFIG=0
 ALLOW_SERVICE_LIST=0
 SET_HARDENING_LEVEL=0
 SUDO_MODE=''
 BATCH_MODE=''
+ASK_LOGLEVEL=''
+ALLOW_UNSUPPORTED_DISTRIBUTION=0
 
 usage() {
-    cat << EOF
+    cat <<EOF
 $LONG_SCRIPT_NAME <RUN_MODE> [OPTIONS], where RUN_MODE is one of:
 
     --help -h
@@ -76,6 +80,10 @@ $LONG_SCRIPT_NAME <RUN_MODE> [OPTIONS], where RUN_MODE is one of:
         Modifies the policy to allow a certain kind of services on the machine, such
         as http, mail, etc. Can be specified multiple times to allow multiple services.
         Use --allow-service-list to get a list of supported services.
+    
+    --create-config-files-only
+        Create the config files in etc/conf.d
+        Must be run as root, before running the audit with user secaudit
 
 OPTIONS:
 
@@ -92,10 +100,19 @@ OPTIONS:
         the '-n' option instructs sudo not to prompt for a password.
         Finally note that '--sudo' mode only works for audit mode.
 
+    --set-log-level <level>
+        This option sets LOGLEVEL, you can choose : info, warning, error, ok, debug.
+        Default value is : info
+
     --batch
         While performing system audit, this option sets LOGLEVEL to 'ok' and
         captures all output to print only one line once the check is done, formatted like :
         OK|KO OK|KO|WARN{subcheck results} [OK|KO|WARN{...}]
+    
+    --allow-unsupported-distribution
+        Must be specified manually in the command line to allow the run on non compatible
+        version or distribution. If you want to mute the warning change the LOGLEVEL
+        in /etc/hardening.cfg
 
 EOF
     exit 0
@@ -108,190 +125,249 @@ fi
 declare -a TEST_LIST ALLOWED_SERVICES_LIST
 
 # Arguments parsing
-while [[ $# > 0 ]]; do
+while [[ $# -gt 0 ]]; do
     ARG="$1"
     case $ARG in
-        --audit)
+    --audit)
-            AUDIT=1
+        AUDIT=1
         ;;
-        --audit-all)
+    --audit-all)
-            AUDIT_ALL=1
+        AUDIT_ALL=1
         ;;
-        --audit-all-enable-passed)
+    --audit-all-enable-passed)
-            AUDIT_ALL_ENABLE_PASSED=1
+        AUDIT_ALL_ENABLE_PASSED=1
         ;;
-        --apply)
+    --apply)
-            APPLY=1
+        APPLY=1
         ;;
-        --allow-service-list)
+    --allow-service-list)
-            ALLOW_SERVICE_LIST=1
+        ALLOW_SERVICE_LIST=1
         ;;
-        --allow-service)
+    --create-config-files-only)
-            ALLOWED_SERVICES_LIST[${#ALLOWED_SERVICES_LIST[@]}]="$2"
+        CREATE_CONFIG=1
-            shift
         ;;
-        --set-hardening-level)
+    --allow-service)
-            SET_HARDENING_LEVEL="$2"
+        ALLOWED_SERVICES_LIST[${#ALLOWED_SERVICES_LIST[@]}]="$2"
-            shift
+        shift
         ;;
-        --only)
+    --set-hardening-level)
-            TEST_LIST[${#TEST_LIST[@]}]="$2"
+        SET_HARDENING_LEVEL="$2"
-            shift
+        shift
         ;;
-        --sudo)
+    --set-log-level)
-            SUDO_MODE='--sudo'
+        ASK_LOGLEVEL=$2
+        shift
         ;;
-        --batch)
+    --only)
-            BATCH_MODE='--batch'
+        TEST_LIST[${#TEST_LIST[@]}]="$2"
-            LOGLEVEL=ok
+        shift
         ;;
-        -h|--help)
+    --sudo)
-            usage
+        SUDO_MODE='--sudo'
         ;;
-        *)
+    --batch)
-            usage
+        BATCH_MODE='--batch'
+        ASK_LOGLEVEL=ok
+        ;;
+    --allow-unsupported-distribution)
+        ALLOW_UNSUPPORTED_DISTRIBUTION=1
+        ;;
+    -h | --help)
+        usage
+        ;;
+    *)
+        usage
         ;;
     esac
     shift
 done
 
 # if no RUN_MODE was passed, usage and quit
-if [ "$AUDIT" -eq 0 -a "$AUDIT_ALL" -eq 0 -a "$AUDIT_ALL_ENABLE_PASSED" -eq 0 -a "$APPLY" -eq 0 ]; then
+if [ "$AUDIT" -eq 0 ] && [ "$AUDIT_ALL" -eq 0 ] && [ "$AUDIT_ALL_ENABLE_PASSED" -eq 0 ] && [ "$APPLY" -eq 0 ] && [ "$CREATE_CONFIG" -eq 0 ]; then
     usage
 fi
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
-[ -r $CIS_ROOT_DIR/lib/constants.sh  ] && . $CIS_ROOT_DIR/lib/constants.sh
+# shellcheck source=../etc/hardening.cfg
-[ -r $CIS_ROOT_DIR/etc/hardening.cfg ] && . $CIS_ROOT_DIR/etc/hardening.cfg
+[ -r "$CIS_ROOT_DIR"/etc/hardening.cfg ] && . "$CIS_ROOT_DIR"/etc/hardening.cfg
-[ -r $CIS_ROOT_DIR/lib/common.sh     ] && . $CIS_ROOT_DIR/lib/common.sh
+if [ "$ASK_LOGLEVEL" ]; then LOGLEVEL=$ASK_LOGLEVEL; fi
-[ -r $CIS_ROOT_DIR/lib/utils.sh      ] && . $CIS_ROOT_DIR/lib/utils.sh
+# shellcheck source=../lib/common.sh
+[ -r "$CIS_ROOT_DIR"/lib/common.sh ] && . "$CIS_ROOT_DIR"/lib/common.sh
+# shellcheck source=../lib/utils.sh
+[ -r "$CIS_ROOT_DIR"/lib/utils.sh ] && . "$CIS_ROOT_DIR"/lib/utils.sh
+# shellcheck source=../lib/constants.sh
+[ -r "$CIS_ROOT_DIR"/lib/constants.sh ] && . "$CIS_ROOT_DIR"/lib/constants.sh
 
-if [ $BATCH_MODE ]; then MACHINE_LOG_LEVEL=3; fi
+# If we're on a unsupported platform and there is no flag --allow-unsupported-distribution
+# print warning, otherwise quit
+
+if [ "$DISTRIBUTION" != "debian" ]; then
+    echo "Your distribution has been identified as $DISTRIBUTION which is not debian"
+    if [ "$ALLOW_UNSUPPORTED_DISTRIBUTION" -eq 0 ]; then
+        echo "If you want to run it anyway, you can use the flag --allow-unsupported-distribution"
+        echo "Exiting now"
+        exit 100
+    elif [ "$ALLOW_UNSUPPORTED_DISTRIBUTION" -eq 0 ] && [ "$MACHINE_LOG_LEVEL" -ge 2 ]; then
+        echo "Be aware that the result given by this set of scripts can give you a false feedback of security on unsupported distributions !"
+        echo "You can deactivate this message by setting the LOGLEVEL variable in /etc/hardening.cfg"
+    fi
+else
+    if [ "$DEB_MAJ_VER" = "sid" ] || [ "$DEB_MAJ_VER" -gt "$HIGHEST_SUPPORTED_DEBIAN_VERSION" ]; then
+        echo "Your debian version is too recent and is not supported yet because there is no official CIS PDF for this version yet."
+        if [ "$ALLOW_UNSUPPORTED_DISTRIBUTION" -eq 0 ]; then
+            echo "If you want to run it anyway, you can use the flag --allow-unsupported-distribution"
+            echo "Exiting now"
+            exit 100
+        elif [ "$ALLOW_UNSUPPORTED_DISTRIBUTION" -eq 0 ] && [ "$MACHINE_LOG_LEVEL" -ge 2 ]; then
+            echo "Be aware that the result given by this set of scripts can give you a false feedback of security on unsupported distributions !"
+            echo "You can deactivate this message by setting the LOGLEVEL variable in /etc/hardening.cfg"
+        fi
+    elif [ "$DEB_MAJ_VER" -lt "$SMALLEST_SUPPORTED_DEBIAN_VERSION" ]; then
+        echo "Your debian version is deprecated and is no more maintained. Please upgrade to a supported version."
+        if [ "$ALLOW_UNSUPPORTED_DISTRIBUTION" -eq 0 ]; then
+            echo "If you want to run it anyway, you can use the flag --allow-unsupported-distribution"
+            echo "Exiting now"
+            exit 100
+        elif [ "$ALLOW_UNSUPPORTED_DISTRIBUTION" -eq 0 ] && [ "$MACHINE_LOG_LEVEL" -ge 2 ]; then
+            echo "Be aware that the result given by this set of scripts can give you a false feedback of security on unsupported distributions, especially on deprecated ones !"
+            echo "You can deactivate this message by setting the LOGLEVEL variable in /etc/hardening.cfg"
+        fi
+    fi
+fi
 
 # If --allow-service-list is specified, don't run anything, just list the supported services
-if [ "$ALLOW_SERVICE_LIST" = 1 ] ; then
+if [ "$ALLOW_SERVICE_LIST" = 1 ]; then
     declare -a HARDENING_EXCEPTIONS_LIST
-    for SCRIPT in $(ls $CIS_ROOT_DIR/bin/hardening/*.sh -v); do
+    for SCRIPT in $(find "$CIS_ROOT_DIR"/bin/hardening/ -name "*.sh" | sort -V); do
         template=$(grep "^HARDENING_EXCEPTION=" "$SCRIPT" | cut -d= -f2)
         [ -n "$template" ] && HARDENING_EXCEPTIONS_LIST[${#HARDENING_EXCEPTIONS_LIST[@]}]="$template"
     done
-    echo "Supported services are: "$(echo "${HARDENING_EXCEPTIONS_LIST[@]}" | tr " " "\n" | sort -u | tr "\n" " ")
+    echo "Supported services are:" "$(echo "${HARDENING_EXCEPTIONS_LIST[@]}" | tr " " "\n" | sort -u | tr "\n" " ")"
     exit 0
 fi
 
 # If --set-hardening-level is specified, don't run anything, just apply config for each script
-if [ -n "$SET_HARDENING_LEVEL" -a "$SET_HARDENING_LEVEL" != 0 ] ; then
+if [ -n "$SET_HARDENING_LEVEL" ] && [ "$SET_HARDENING_LEVEL" != 0 ]; then
-    if ! grep -q "^[12345]$" <<< "$SET_HARDENING_LEVEL" ; then
+    if ! grep -q "^[12345]$" <<<"$SET_HARDENING_LEVEL"; then
         echo "Bad --set-hardening-level specified ('$SET_HARDENING_LEVEL'), expected 1 to 5"
         exit 1
     fi
 
-    for SCRIPT in $(ls $CIS_ROOT_DIR/bin/hardening/*.sh -v); do
+    for SCRIPT in $(find "$CIS_ROOT_DIR"/bin/hardening/ -name "*.sh" | sort -V); do
-        SCRIPT_BASENAME=$(basename $SCRIPT .sh)
+        SCRIPT_BASENAME=$(basename "$SCRIPT" .sh)
         script_level=$(grep "^HARDENING_LEVEL=" "$SCRIPT" | cut -d= -f2)
-        if [ -z "$script_level" ] ; then
+        if [ -z "$script_level" ]; then
             echo "The script $SCRIPT_BASENAME doesn't have a hardening level, configuration untouched for it"
             continue
         fi
         wantedstatus=disabled
         [ "$script_level" -le "$SET_HARDENING_LEVEL" ] && wantedstatus=enabled
-        sed -i -re "s/^status=.+/status=$wantedstatus/" $CIS_ROOT_DIR/etc/conf.d/$SCRIPT_BASENAME.cfg
+        sed -i -re "s/^status=.+/status=$wantedstatus/" "$CIS_ROOT_DIR/etc/conf.d/$SCRIPT_BASENAME.cfg"
     done
     echo "Configuration modified to enable scripts for hardening level at or below $SET_HARDENING_LEVEL"
     exit 0
 fi
 
+if [ "$CREATE_CONFIG" = 1 ] && [ "$EUID" -ne 0 ]; then
+    echo "For --create-config-files-only, please run as root"
+    exit 1
+fi
+
 # Parse every scripts and execute them in the required mode
-for SCRIPT in $(ls $CIS_ROOT_DIR/bin/hardening/*.sh -v); do
+for SCRIPT in $(find "$CIS_ROOT_DIR"/bin/hardening/ -name "*.sh" | sort -V); do
-    if [ ${#TEST_LIST[@]} -gt 0 ] ; then
+    if [ "${#TEST_LIST[@]}" -gt 0 ]; then
         # --only X has been specified at least once, is this script in my list ?
-        SCRIPT_PREFIX=$(grep -Eo '^[0-9.]+' <<< "$(basename $SCRIPT)")
+        SCRIPT_PREFIX=$(grep -Eo '^[0-9.]+' <<<"$(basename "$SCRIPT")")
-        SCRIPT_PREFIX_RE=$(sed -e 's/\./\\./g' <<< "$SCRIPT_PREFIX")
+        # shellcheck disable=SC2001
-        if ! grep -qwE "(^| )$SCRIPT_PREFIX_RE" <<< "${TEST_LIST[@]}"; then
+        SCRIPT_PREFIX_RE=$(sed -e 's/\./\\./g' <<<"$SCRIPT_PREFIX")
+        if ! grep -qwE "(^| )$SCRIPT_PREFIX_RE" <<<"${TEST_LIST[@]}"; then
             # not in the list
             continue
         fi
     fi
 
     info "Treating $SCRIPT"
-
+    if [ "$CREATE_CONFIG" = 1 ]; then
-    if [ $AUDIT = 1 ]; then
+        debug "$CIS_ROOT_DIR/bin/hardening/$SCRIPT --create-config-files-only"
+        "$SCRIPT" --create-config-files-only "$BATCH_MODE"
+    elif [ "$AUDIT" = 1 ]; then
         debug "$CIS_ROOT_DIR/bin/hardening/$SCRIPT --audit $SUDO_MODE $BATCH_MODE"
-        $SCRIPT --audit $SUDO_MODE $BATCH_MODE
+        "$SCRIPT" --audit "$SUDO_MODE" "$BATCH_MODE"
-    elif [ $AUDIT_ALL = 1 ]; then
+    elif [ "$AUDIT_ALL" = 1 ]; then
         debug "$CIS_ROOT_DIR/bin/hardening/$SCRIPT --audit-all $SUDO_MODE $BATCH_MODE"
-        $SCRIPT --audit-all $SUDO_MODE $BATCH_MODE
+        "$SCRIPT" --audit-all "$SUDO_MODE" "$BATCH_MODE"
-    elif [ $AUDIT_ALL_ENABLE_PASSED = 1 ]; then
+    elif [ "$AUDIT_ALL_ENABLE_PASSED" = 1 ]; then
-        debug "$CIS_ROOT_DIR/bin/hardening/$SCRIPT --audit-all $SUDO_MODE" $BATCH_MODE
+        debug "$CIS_ROOT_DIR/bin/hardening/$SCRIPT --audit-all $SUDO_MODE $BATCH_MODE"
-        $SCRIPT --audit-all $SUDO_MODE $BATCH_MODE
+        "$SCRIPT" --audit-all "$SUDO_MODE" "$BATCH_MODE"
-    elif [ $APPLY = 1 ]; then
+    elif [ "$APPLY" = 1 ]; then
         debug "$CIS_ROOT_DIR/bin/hardening/$SCRIPT"
-        $SCRIPT
+        "$SCRIPT"
     fi
 
     SCRIPT_EXITCODE=$?
 
     debug "Script $SCRIPT finished with exit code $SCRIPT_EXITCODE"
     case $SCRIPT_EXITCODE in
-        0)
+    0)
-            debug "$SCRIPT passed"
+        debug "$SCRIPT passed"
-            PASSED_CHECKS=$((PASSED_CHECKS+1))
+        PASSED_CHECKS=$((PASSED_CHECKS + 1))
-            if [ $AUDIT_ALL_ENABLE_PASSED = 1 ] ; then
+        if [ "$AUDIT_ALL_ENABLE_PASSED" = 1 ]; then
-                SCRIPT_BASENAME=$(basename $SCRIPT .sh)
+            SCRIPT_BASENAME=$(basename "$SCRIPT" .sh)
-                sed -i -re 's/^status=.+/status=enabled/' $CIS_ROOT_DIR/etc/conf.d/$SCRIPT_BASENAME.cfg
+            sed -i -re 's/^status=.+/status=enabled/' "$CIS_ROOT_DIR/etc/conf.d/$SCRIPT_BASENAME.cfg"
-                info "Status set to enabled in $CIS_ROOT_DIR/etc/conf.d/$SCRIPT_BASENAME.cfg"
+            info "Status set to enabled in $CIS_ROOT_DIR/etc/conf.d/$SCRIPT_BASENAME.cfg"
-            fi
+        fi
         ;;
-        1)
+    1)
-            debug "$SCRIPT failed"
+        debug "$SCRIPT failed"
-            FAILED_CHECKS=$((FAILED_CHECKS+1))
+        FAILED_CHECKS=$((FAILED_CHECKS + 1))
         ;;
-        2)
+    2)
-            debug "$SCRIPT is disabled"
+        debug "$SCRIPT is disabled"
-            DISABLED_CHECKS=$((DISABLED_CHECKS+1))
+        DISABLED_CHECKS=$((DISABLED_CHECKS + 1))
         ;;
     esac
 
-    TOTAL_CHECKS=$((TOTAL_CHECKS+1))
+    TOTAL_CHECKS=$((TOTAL_CHECKS + 1))
 
 done
 
-TOTAL_TREATED_CHECKS=$((TOTAL_CHECKS-DISABLED_CHECKS))
+TOTAL_TREATED_CHECKS=$((TOTAL_CHECKS - DISABLED_CHECKS))
 
-if [ $BATCH_MODE ]; then
+if [ "$BATCH_MODE" ]; then
     BATCH_SUMMARY="AUDIT_SUMMARY "
     BATCH_SUMMARY+="PASSED_CHECKS:${PASSED_CHECKS:-0} "
     BATCH_SUMMARY+="RUN_CHECKS:${TOTAL_TREATED_CHECKS:-0} "
     BATCH_SUMMARY+="TOTAL_CHECKS_AVAIL:${TOTAL_CHECKS:-0}"
-    if [ $TOTAL_TREATED_CHECKS != 0 ]; then
+    if [ "$TOTAL_TREATED_CHECKS" != 0 ]; then
-        CONFORMITY_PERCENTAGE=$(bc -l <<< "scale=2; ($PASSED_CHECKS/$TOTAL_TREATED_CHECKS) * 100")
+        CONFORMITY_PERCENTAGE=$(div $((PASSED_CHECKS * 100)) $TOTAL_TREATED_CHECKS)
         BATCH_SUMMARY+=" CONFORMITY_PERCENTAGE:$(printf "%s" "$CONFORMITY_PERCENTAGE")"
     else
         BATCH_SUMMARY+=" CONFORMITY_PERCENTAGE:N.A" # No check runned, avoid division by 0
     fi
-    becho $BATCH_SUMMARY
+    becho "$BATCH_SUMMARY"
 else
     printf "%40s\n" "################### SUMMARY ###################"
-    printf "%30s %s\n"        "Total Available Checks :" "$TOTAL_CHECKS"
+    printf "%30s %s\n" "Total Available Checks :" "$TOTAL_CHECKS"
-    printf "%30s %s\n"        "Total Runned Checks :" "$TOTAL_TREATED_CHECKS"
+    printf "%30s %s\n" "Total Runned Checks :" "$TOTAL_TREATED_CHECKS"
-    printf "%30s [ %7s ]\n"   "Total Passed Checks :" "$PASSED_CHECKS/$TOTAL_TREATED_CHECKS"
+    printf "%30s [ %7s ]\n" "Total Passed Checks :" "$PASSED_CHECKS/$TOTAL_TREATED_CHECKS"
-    printf "%30s [ %7s ]\n"   "Total Failed Checks :" "$FAILED_CHECKS/$TOTAL_TREATED_CHECKS"
+    printf "%30s [ %7s ]\n" "Total Failed Checks :" "$FAILED_CHECKS/$TOTAL_TREATED_CHECKS"
-    
+
-    ENABLED_CHECKS_PERCENTAGE=$(bc -l <<< "scale=2; ($TOTAL_TREATED_CHECKS/$TOTAL_CHECKS) * 100")
+    ENABLED_CHECKS_PERCENTAGE=$(div $((TOTAL_TREATED_CHECKS * 100)) $TOTAL_CHECKS)
-    CONFORMITY_PERCENTAGE=$(bc -l <<< "scale=2; ($PASSED_CHECKS/$TOTAL_TREATED_CHECKS) * 100")
+    CONFORMITY_PERCENTAGE=$(div $((PASSED_CHECKS * 100)) $TOTAL_TREATED_CHECKS)
-    printf "%30s %s %%\n"   "Enabled Checks Percentage :" "$ENABLED_CHECKS_PERCENTAGE"
+    printf "%30s %s %%\n" "Enabled Checks Percentage :" "$ENABLED_CHECKS_PERCENTAGE"
-    if [ $TOTAL_TREATED_CHECKS != 0 ]; then
+    if [ "$TOTAL_TREATED_CHECKS" != 0 ]; then
-        printf "%30s %s %%\n"   "Conformity Percentage :" "$CONFORMITY_PERCENTAGE"
+        printf "%30s %s %%\n" "Conformity Percentage :" "$CONFORMITY_PERCENTAGE"
     else
-        printf "%30s %s %%\n"   "Conformity Percentage :" "N.A" # No check runned, avoid division by 0
+        printf "%30s %s %%\n" "Conformity Percentage :" "N.A" # No check runned, avoid division by 0
     fi
 fi

bin/hardening/1.1.1.1_disable_freevxfs.sh

@@ -1,40 +1,52 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.1.1 Disable Mounting of freevxfs Filesystems (Not Scored)
+# 1.1.1.1 Ensure Mounting of freevxfs filesystems is disabled (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Disable mounting of freevxfs filesystems."
 
 KERNEL_OPTION="CONFIG_VXFS_FS"
 MODULE_NAME="freevxfs"
 
-
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_kernel_option_enabled $KERNEL_OPTION $MODULE_NAME
+    if [ "$IS_CONTAINER" -eq 1 ]; then
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
-        crit "$KERNEL_OPTION is enabled!"
+        ok "Container detected, consider host enforcing or disable this check!"
     else
-        ok "$KERNEL_OPTION is disabled"
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            crit "$MODULE_NAME is enabled!"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    is_kernel_option_enabled $KERNEL_OPTION
+    if [ "$IS_CONTAINER" -eq 1 ]; then
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
-        warn "I cannot fix $KERNEL_OPTION enabled, recompile your kernel please"
+        ok "Container detected, consider host enforcing!"
     else
-        ok "$KERNEL_OPTION is disabled, nothing to do"
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            warn "I cannot fix $MODULE_NAME, recompile your kernel or blacklist module $MODULE_NAME (/etc/modprobe.d/blacklist.conf : +install $MODULE_NAME /bin/true)"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
     fi
 }
 
@@ -45,17 +57,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.1.2_disable_jffs2.sh

@@ -1,40 +1,52 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.1.2 Disable Mounting of jffs2 Filesystems (Not Scored)
+# 1.1.1.2 Esnure mounting of jffs2 filesystems is disabled (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Disable mounting of jffs2 filesystems."
 
 KERNEL_OPTION="CONFIG_JFFS2_FS"
 MODULE_NAME="jffs2"
 
-
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_kernel_option_enabled $KERNEL_OPTION $MODULE_NAME
+    if [ "$IS_CONTAINER" -eq 1 ]; then
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
-        crit "$KERNEL_OPTION is enabled!"
+        ok "Container detected, consider host enforcing or disable this check!"
     else
-        ok "$KERNEL_OPTION is disabled"
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME" "($MODULE_NAME|install)"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            crit "$MODULE_NAME is enabled!"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    is_kernel_option_enabled $KERNEL_OPTION
+    if [ "$IS_CONTAINER" -eq 1 ]; then
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
-        warn "I cannot fix $KERNEL_OPTION enabled, recompile your kernel please"
+        ok "Container detected, consider host enforcing!"
     else
-        ok "$KERNEL_OPTION is disabled, nothing to do"
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME" "($MODULE_NAME|install)"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            warn "I cannot fix $MODULE_NAME, recompile your kernel or blacklist module $MODULE_NAME (/etc/modprobe.d/blacklist.conf : +install $MODULE_NAME /bin/true)"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
     fi
 }
 
@@ -45,17 +57,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.1.3_disable_hfs.sh

@@ -1,40 +1,52 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.1.3 Disable Mounting of hfs Filesystems (Not Scored)
+# 1.1.1.3 Ensure mounting of hfs filesystems is disabled (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Disable mounting of hfs filesystems."
 
 KERNEL_OPTION="CONFIG_HFS_FS"
-MODULE_FILE="hfs"
+MODULE_NAME="hfs"
-
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_kernel_option_enabled $KERNEL_OPTION $MODULE_FILE
+    if [ "$IS_CONTAINER" -eq 1 ]; then
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
-        crit "$KERNEL_OPTION is enabled!"
+        ok "Container detected, consider host enforcing or disable this check!"
     else
-        ok "$KERNEL_OPTION is disabled"
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            crit "$MODULE_NAME is enabled!"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    is_kernel_option_enabled $KERNEL_OPTION
+    if [ "$IS_CONTAINER" -eq 1 ]; then
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
-        warn "I cannot fix $KERNEL_OPTION enabled, recompile your kernel please"
+        ok "Container detected, consider host enforcing!"
     else
-        ok "$KERNEL_OPTION is disabled, nothing to do"
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            warn "I cannot fix $MODULE_NAME, recompile your kernel or blacklist module $MODULE_NAME (/etc/modprobe.d/blacklist.conf : +install $MODULE_NAME /bin/true)"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
     fi
 }
 
@@ -45,17 +57,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.1.4_disable_hfsplus.sh

@@ -1,40 +1,52 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.1.4 Disable Mounting of hfsplus Filesystems (Not Scored)
+# 1.1.1.4 Ensure mounting of hfsplus filesystems is disabled (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Disable mounting of hfsplus filesystems."
 
 KERNEL_OPTION="CONFIG_HFSPLUS_FS"
-MODULE_FILE="hfsplus"
+MODULE_NAME="hfsplus"
-
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_kernel_option_enabled $KERNEL_OPTION $MODULE_FILE
+    if [ "$IS_CONTAINER" -eq 1 ]; then
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
-        crit "$KERNEL_OPTION is enabled!"
+        ok "Container detected, consider host enforcing or disable this check!"
     else
-        ok "$KERNEL_OPTION is disabled"
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            crit "$MODULE_NAME is enabled!"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    is_kernel_option_enabled $KERNEL_OPTION
+    if [ "$IS_CONTAINER" -eq 1 ]; then
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
-        warn "I cannot fix $KERNEL_OPTION enabled, recompile your kernel please"
+        ok "Container detected, consider host enforcing!"
     else
-        ok "$KERNEL_OPTION is disabled, nothing to do"
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            warn "I cannot fix $MODULE_NAME, recompile your kernel or blacklist module $MODULE_NAME (/etc/modprobe.d/blacklist.conf : +install $MODULE_NAME /bin/true)"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
     fi
 }
 
@@ -45,17 +57,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.1.5_disable_squashfs.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.1.1.5 Ensure mounting of squashfs filesystems is disabled (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+DESCRIPTION="Disable mounting of squashfs filesytems."
+
+KERNEL_OPTION="CONFIG_SQUASHFS"
+MODULE_NAME="squashfs"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    if [ "$IS_CONTAINER" -eq 1 ]; then
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
+        ok "Container detected, consider host enforcing or disable this check!"
+    else
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME" "($MODULE_NAME|install)"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            crit "$MODULE_NAME is enabled!"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    if [ "$IS_CONTAINER" -eq 1 ]; then
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
+        ok "Container detected, consider host enforcing!"
+    else
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME" "($MODULE_NAME|install)"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            warn "I cannot fix $MODULE_NAME, recompile your kernel or blacklist module $MODULE_NAME (/etc/modprobe.d/blacklist.conf : +install $MODULE_NAME /bin/true)"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.1.1.5_disable_udf.sh

@@ -1,62 +0,0 @@
-#!/bin/bash
-
-#
-# CIS Debian Hardening
-#
-
-#
-# 1.1.1.5 Disable Mounting of udf Filesystems (Not Scored)
-#
-
-set -e # One error, it's over
-set -u # One variable unset, it's over
-
-HARDENING_LEVEL=2
-DESCRIPTION="Disable mounting of udf filesystems."
-
-KERNEL_OPTION="CONFIG_UDF_FS"
-MODULE_FILE="udf"
-
-
-# This function will be called if the script status is on enabled / audit mode
-audit () {
-    is_kernel_option_enabled $KERNEL_OPTION $MODULE_FILE
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
-        crit "$KERNEL_OPTION is enabled!"
-    else
-        ok "$KERNEL_OPTION is disabled"
-    fi
-}
-
-# This function will be called if the script status is on enabled mode
-apply () {
-    is_kernel_option_enabled $KERNEL_OPTION
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
-        warn "I cannot fix $KERNEL_OPTION enabled, recompile your kernel please"
-    else
-        ok "$KERNEL_OPTION is disabled, nothing to do"
-    fi
-}
-
-# This function will check config parameters required
-check_config() {
-    :
-}
-
-# Source Root Dir Parameter
-if [ -r /etc/default/cis-hardening ]; then
-    . /etc/default/cis-hardening
-fi
-if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
-    exit 128
-fi
-
-# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
-else
-    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
-    exit 128
-fi

bin/hardening/1.1.1.6_disable_udf.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.1.1.6 Ensure mounting of udf filesystems is disabled (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+DESCRIPTION="Disable mounting of udf filesystems."
+
+KERNEL_OPTION="CONFIG_UDF_FS"
+MODULE_NAME="udf"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    if [ "$IS_CONTAINER" -eq 1 ]; then
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
+        ok "Container detected, consider host enforcing or disable this check!"
+    else
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME" "($MODULE_NAME|install)"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            crit "$MODULE_NAME is enabled!"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    if [ "$IS_CONTAINER" -eq 1 ]; then
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
+        ok "Container detected, consider host enforcing!"
+    else
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME" "($MODULE_NAME|install)"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            warn "I cannot fix $MODULE_NAME, recompile your kernel or blacklist module $MODULE_NAME (/etc/modprobe.d/blacklist.conf : +install $MODULE_NAME /bin/true)"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.1.1.7_disable_squashfs.sh

@@ -1,64 +0,0 @@
-#!/bin/bash
-
-#
-# CIS Debian Hardening
-#
-
-#
-# 1.1.1.7 Disable Mounting of squashfs Filesystems (Not Scored)
-#
-
-set -e # One error, it's over
-set -u # One variable unset, it's over
-
-HARDENING_LEVEL=2
-DESCRIPTION="Disable mounting of squashfs filesytems."
-
-KERNEL_OPTION="CONFIG_SQUASHFS"
-MODULE_FILE="squashfs"
-
-
-# This function will be called if the script status is on enabled / audit mode
-audit () {
-    is_kernel_option_enabled $KERNEL_OPTION $MODULE_FILE
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
-        crit "$KERNEL_OPTION is enabled!"
-    else
-        ok "$KERNEL_OPTION is disabled"
-    fi
-    :
-}
-
-# This function will be called if the script status is on enabled mode
-apply () {
-    is_kernel_option_enabled $KERNEL_OPTION
-    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
-        warn "I cannot fix $KERNEL_OPTION enabled, recompile your kernel please"
-    else
-        ok "$KERNEL_OPTION is disabled, nothing to do"
-    fi
-    :
-}
-
-# This function will check config parameters required
-check_config() {
-    :
-}
-
-# Source Root Dir Parameter
-if [ -r /etc/default/cis-hardening ]; then
-    . /etc/default/cis-hardening
-fi
-if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
-    exit 128
-fi
-
-# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
-else
-    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
-    exit 128
-fi

bin/hardening/1.1.1.7_restrict_fat.sh

@@ -0,0 +1,69 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.1.1.7 Ensure mounting of FAT filesystems is limited (Not Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=5
+# shellcheck disable=2034
+DESCRIPTION="Limit mounting of FAT filesystems."
+
+# Note: we check /proc/config.gz to be compliant with both monolithic and modular kernels
+
+KERNEL_OPTION="CONFIG_VFAT_FS"
+MODULE_FILE="vfat"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    # TODO check if uefi enabled if yes check if only boot partition use FAT
+    is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_FILE"
+    if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+        crit "$KERNEL_OPTION is enabled!"
+    else
+        ok "$KERNEL_OPTION is disabled"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    is_kernel_option_enabled "$KERNEL_OPTION"
+    if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+        warn "I cannot fix $KERNEL_OPTION enabled, recompile your kernel please"
+    else
+        ok "$KERNEL_OPTION is disabled, nothing to do"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.1.10_var_tmp_noexec.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,7 +12,9 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="/var/tmp partition with noexec option."
 
 # Quick factoring as many script use the same logic
@@ -19,47 +22,47 @@ PARTITION="/var/tmp"
 OPTION="noexec"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
-                FNRET=3 
+                FNRET=3
             else
                 ok "$PARTITION mounted with $OPTION"
             fi
-        fi       
+        fi
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    fi 
+    fi
 }
 
 # This function will check config parameters required
@@ -70,17 +73,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.11_var_log_partition.sh

@@ -1,34 +1,37 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.11 Create Separate Partition for /var/log (Scored)
+# 1.1.11 Ensure separate partition exists for /var/log (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="/var/log on separate partition."
 
 # Quick factoring as many script use the same logic
 PARTITION="/var/log"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
         is_mounted "$PARTITION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             warn "$PARTITION is not mounted"
             FNRET=1
         else
@@ -38,14 +41,14 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
     else
         info "mounting $PARTITION"
-        mount $PARTITION
+        mount "$PARTITION"
     fi
 }
 
@@ -57,17 +60,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.12_var_log_audit_partition.sh

@@ -1,34 +1,37 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.12 Create Separate Partition for /var/log/audit (Scored)
+# 1.1.12 Ensure separate partition exists for /var/log/audit (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=4
+# shellcheck disable=2034
 DESCRIPTION="/var/log/audit on a separate partition."
 
 # Quick factoring as many script use the same logic
 PARTITION="/var/log/audit"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
         is_mounted "$PARTITION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             warn "$PARTITION is not mounted"
             FNRET=1
         else
@@ -38,14 +41,14 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
     else
         info "mounting $PARTITION"
-        mount $PARTITION
+        mount "$PARTITION"
     fi
 }
 
@@ -57,17 +60,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.13_home_partition.sh

@@ -1,34 +1,37 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.13 Create Separate Partition for /home (Scored)
+# 1.1.13 Ensure separate partition exists for /home (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="/home on a separate partition."
 
 # Quick factoring as many script use the same logic
 PARTITION="/home"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
         is_mounted "$PARTITION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             warn "$PARTITION is not mounted"
             FNRET=1
         else
@@ -38,14 +41,14 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
     else
         info "mounting $PARTITION"
-        mount $PARTITION
+        mount "$PARTITION"
     fi
 }
 
@@ -57,17 +60,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.14_home_nodev.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,7 +12,9 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="/home partition with nodev option."
 
 # Quick factoring as many script use the same logic
@@ -19,23 +22,23 @@ PARTITION="/home"
 OPTION="nodev"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
                 FNRET=3
             else
@@ -46,19 +49,19 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
     fi
 }
 
@@ -70,17 +73,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.15_run_shm_nodev.sh

@@ -22,24 +22,24 @@ PARTITION="/run/shm"
 OPTION="nodev"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     PARTITION=$(readlink -e "$PARTITION")
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
                 FNRET=3
             else
@@ -50,19 +50,19 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
     fi
 }
 
@@ -74,17 +74,18 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
 if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    # shellcheck source=/opt/debian-cis/lib/main.sh
+    # shellcheck source=../../lib/main.sh
     . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"

bin/hardening/1.1.16_run_shm_nosuid.sh

@@ -6,7 +6,7 @@
 #
 
 #
-# 1.1.16 Ensure nosuid Option set on /run/shm Partition (Scored)
+# 1.1.16 Ensure nosuid option set on /run/shm partition (Scored)
 #
 
 set -e # One error, it's over
@@ -22,24 +22,24 @@ PARTITION="/run/shm"
 OPTION="nosuid"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     PARTITION=$(readlink -e "$PARTITION")
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
                 FNRET=3
             else
@@ -50,19 +50,19 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
     fi
 }
 
@@ -74,17 +74,18 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
 if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    # shellcheck source=/opt/debian-cis/lib/main.sh
+    # shellcheck source=../../lib/main.sh
     . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"

bin/hardening/1.1.17_run_shm_noexec.sh

@@ -6,7 +6,7 @@
 #
 
 #
-# 1.1.17 Ensure noexec Option set on /run/shm Partition (Scored)
+# 1.1.17 Ensure noexec option set on /run/shm partition (Scored)
 #
 
 set -e # One error, it's over
@@ -22,24 +22,24 @@ PARTITION="/run/shm"
 OPTION="noexec"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     PARTITION=$(readlink -e "$PARTITION")
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
                 FNRET=3
             else
@@ -50,19 +50,19 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
     fi
 }
 
@@ -74,17 +74,18 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
 if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    # shellcheck source=/opt/debian-cis/lib/main.sh
+    # shellcheck source=../../lib/main.sh
     . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"

bin/hardening/1.1.18_removable_device_nodev.sh

@@ -1,17 +1,20 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.18 Add nodev Option to Removable Media Partitions (Not Scored)
+# 1.1.18 Ensure nodev option set on removable media partition (Not Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="nodev option for removable media partitions."
 
 # Fair warning, it only checks /media.* like partition in fstab, it's not exhaustive
@@ -21,17 +24,17 @@ PARTITION="/media\S*"
 OPTION="nodev"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying if there is $PARTITION like partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         ok "There is no partition like $PARTITION"
         FNRET=0
     else
         info "detected $PARTITION like"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
@@ -41,12 +44,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
     fi
 }
 
@@ -58,17 +61,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.19_removable_device_nosuid.sh

@@ -1,17 +1,20 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.19 Ensure nosuid Option set on Removable Media Partitions (Not Scored)
+# 1.1.19 Ensure nosuid option set on removable media partitions (Not Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="nosuid option for removable media partitions."
 
 # Fair warning, it only checks /media.* like partition in fstab, it's not exhaustive
@@ -21,17 +24,17 @@ PARTITION="/media\S*"
 OPTION="nosuid"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying if there is $PARTITION like partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         ok "There is no partition like $PARTITION"
         FNRET=0
     else
         info "detected $PARTITION like"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
@@ -41,12 +44,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
     fi
 }
 
@@ -58,17 +61,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.20_removable_device_noexec.sh

@@ -1,17 +1,20 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.20 Ensure noexec Option set on Removable Media Partitions (Not Scored)
+# 1.1.20 Ensure noexec option set on removable media partition (Not Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="noexec option for removable media partitions."
 
 # Fair warning, it only checks /media.* like partition in fstab, it's not exhaustive
@@ -21,17 +24,17 @@ PARTITION="/media\S*"
 OPTION="noexec"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying if there is $PARTITION like partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         ok "There is no partition like $PARTITION"
         FNRET=0
     else
         info "detected $PARTITION like"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
@@ -41,12 +44,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
     fi
 }
 
@@ -58,17 +61,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.21_sticky_bit_world_writable_folder.sh

@@ -1,27 +1,32 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.21 Ensure Sticky Bit set on All World-Writable Directories (Scored)
+# 1.1.21 Ensure sticky bit is set on all world-writable directories (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Set sticky bit on world writable directories to prevent users from deleting or renaming files that are not owned by them."
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Checking if setuid is set on world writable Directories"
-    FS_NAMES=$(df --local -P | awk {'if (NR!=1) print $6'} )
+    FS_NAMES=$(df --local -P | awk '{if (NR!=1) print $6}')
-    RESULT=$( $SUDO_CMD find $FS_NAMES -xdev -type d \( -perm -0002 -a ! -perm -1000 \) -print 2>/dev/null)
+    # shellcheck disable=SC2086
-    if [ ! -z "$RESULT" ]; then
+    RESULT=$($SUDO_CMD find $FS_NAMES -xdev -type d \( -perm -0002 -a ! -perm -1000 \) -print 2>/dev/null)
+    if [ -n "$RESULT" ]; then
         crit "Some world writable directories are not on sticky bit mode!"
-        FORMATTED_RESULT=$(sed "s/ /\n/g" <<< $RESULT | sort | uniq | tr '\n' ' ')
+        # shellcheck disable=SC2001
+        FORMATTED_RESULT=$(sed "s/ /\n/g" <<<"$RESULT" | sort | uniq | tr '\n' ' ')
         crit "$FORMATTED_RESULT"
     else
         ok "All world writable directories have a sticky bit"
@@ -29,10 +34,10 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    RESULT=$(df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type d \( -perm -0002 -a ! -perm -1000 \) -print 2>/dev/null)
+    RESULT=$(df --local -P | awk '{if (NR!=1) print $6}' | xargs -I '{}' find '{}' -xdev -type d \( -perm -0002 -a ! -perm -1000 \) -print 2>/dev/null)
-    if [ ! -z "$RESULT" ]; then
+    if [ -n "$RESULT" ]; then
-        df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type d -perm -0002 2>/dev/null | xargs chmod a+t
+        df --local -P | awk '{if (NR!=1) print $6}' | xargs -I '{}' find '{}' -xdev -type d -perm -0002 2>/dev/null | xargs chmod a+t
     else
         ok "All world writable directories have a sticky bit, nothing to apply"
     fi
@@ -46,17 +51,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.22_disable_automounting.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,16 +12,18 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Disable automounting of devices."
 
 SERVICE_NAME="autofs"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Checking if $SERVICE_NAME is enabled"
-    is_service_enabled $SERVICE_NAME
+    is_service_enabled "$SERVICE_NAME"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$SERVICE_NAME is enabled"
     else
         ok "$SERVICE_NAME is disabled"
@@ -28,12 +31,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     info "Checking if $SERVICE_NAME is enabled"
-    is_service_enabled $SERVICE_NAME
+    is_service_enabled "$SERVICE_NAME"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         info "Disabling $SERVICE_NAME"
-        update-rc.d $SERVICE_NAME remove > /dev/null 2>&1
+        update-rc.d "$SERVICE_NAME" remove >/dev/null 2>&1
     else
         ok "$SERVICE_NAME is disabled"
     fi
@@ -46,17 +49,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.23_disable_usb_storage.sh

@@ -0,0 +1,78 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.1.23 Disable USB storage (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+DESCRIPTION="Disable USB storage."
+
+# Note: we check /proc/config.gz to be compliant with both monolithic and modular kernels
+
+KERNEL_OPTION="CONFIG_USB_STORAGE"
+MODULE_NAME="usb-storage"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    if [ "$IS_CONTAINER" -eq 1 ]; then
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
+        ok "Container detected, consider host enforcing or disable this check!"
+    else
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            crit "$MODULE_NAME is enabled!"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    if [ "$IS_CONTAINER" -eq 1 ]; then
+        # In an unprivileged container, the kernel modules are host dependent, so you should consider enforcing it
+        ok "Container detected, consider host enforcing!"
+    else
+        is_kernel_option_enabled "$KERNEL_OPTION" "$MODULE_NAME"
+        if [ "$FNRET" = 0 ]; then # 0 means true in bash, so it IS activated
+            warn "I cannot fix $MODULE_NAME, recompile your kernel or blacklist module $MODULE_NAME (/etc/modprobe.d/blacklist.conf : +install $MODULE_NAME /bin/true)"
+        else
+            ok "$MODULE_NAME is disabled"
+        fi
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.1.2_tmp_partition.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,24 +12,26 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure /tmp is configured (Scored)"
 
 # Quick factoring as many script use the same logic
 PARTITION="/tmp"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
         is_mounted "$PARTITION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             warn "$PARTITION is not mounted"
             FNRET=1
         else
@@ -38,14 +41,14 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
     else
         info "mounting $PARTITION"
-        mount $PARTITION
+        mount "$PARTITION"
     fi
 }
 
@@ -57,17 +60,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.3_tmp_nodev.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,7 +12,9 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="/tmp partition with nodev option."
 
 # Quick factoring as many script use the same logic
@@ -19,47 +22,47 @@ PARTITION="/tmp"
 OPTION="nodev"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
-                FNRET=3 
+                FNRET=3
             else
                 ok "$PARTITION mounted with $OPTION"
             fi
-        fi       
+        fi
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    fi 
+    fi
 }
 
 # This function will check config parameters required
@@ -70,17 +73,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.4_tmp_nosuid.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,7 +12,9 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="/tmp partition with nosuid option."
 
 # Quick factoring as many script use the same logic
@@ -19,23 +22,23 @@ PARTITION="/tmp"
 OPTION="nosuid"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
                 FNRET=3
             else
@@ -46,19 +49,19 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
     fi
 }
 
@@ -70,17 +73,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.5_tmp_noexec.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,7 +12,9 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="/tmp partition with noexec option."
 
 # Quick factoring as many script use the same logic
@@ -19,23 +22,23 @@ PARTITION="/tmp"
 OPTION="noexec"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
                 FNRET=3
             else
@@ -46,19 +49,19 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
     fi
 }
 
@@ -70,17 +73,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.6_var_partition.sh

@@ -1,53 +1,56 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.1.6 Create Separate Partition for /var (Scored)
+# 1.1.6 Ensure separate partition exists for /var (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="/var on a separate partition."
 
 # Quick factoring as many script use the same logic
 PARTITION="/var"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
         is_mounted "$PARTITION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             warn "$PARTITION is not mounted"
             FNRET=1
         else
             ok "$PARTITION is mounted"
         fi
     fi
-     
+
     :
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
     else
         info "mounting $PARTITION"
-        mount $PARTITION
+        mount "$PARTITION"
     fi
 }
 
@@ -59,17 +62,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.7_var_tmp_partition.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,43 +12,45 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="/var/tmp on a separate partition."
 
 # Quick factoring as many script use the same logic
 PARTITION="/var/tmp"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
         is_mounted "$PARTITION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             warn "$PARTITION is not mounted"
             FNRET=1
         else
             ok "$PARTITION is mounted"
         fi
     fi
-     
+
     :
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
     else
         info "mounting $PARTITION"
-        mount $PARTITION
+        mount "$PARTITION"
     fi
 }
 
@@ -59,17 +62,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.8_var_tmp_nodev.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,7 +12,9 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="/var/tmp partition with nodev option."
 
 # Quick factoring as many script use the same logic
@@ -19,47 +22,47 @@ PARTITION="/var/tmp"
 OPTION="nodev"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
-                FNRET=3 
+                FNRET=3
             else
                 ok "$PARTITION mounted with $OPTION"
             fi
-        fi       
+        fi
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    fi 
+    fi
 }
 
 # This function will check config parameters required
@@ -70,17 +73,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.1.9_var_tmp_nosuid.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,7 +12,9 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="/var/tmp partition with nosuid option."
 
 # Quick factoring as many script use the same logic
@@ -19,47 +22,47 @@ PARTITION="/var/tmp"
 OPTION="nosuid"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Verifying that $PARTITION is a partition"
     FNRET=0
     is_a_partition "$PARTITION"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$PARTITION is not a partition"
         FNRET=2
     else
         ok "$PARTITION is a partition"
-        has_mount_option $PARTITION $OPTION
+        has_mount_option "$PARTITION" "$OPTION"
-        if [ $FNRET -gt 0 ]; then
+        if [ "$FNRET" -gt 0 ]; then
             crit "$PARTITION has no option $OPTION in fstab!"
             FNRET=1
         else
             ok "$PARTITION has $OPTION in fstab"
-            has_mounted_option $PARTITION $OPTION
+            has_mounted_option "$PARTITION" "$OPTION"
-            if [ $FNRET -gt 0 ]; then
+            if [ "$FNRET" -gt 0 ]; then
                 warn "$PARTITION is not mounted with $OPTION at runtime"
-                FNRET=3 
+                FNRET=3
             else
                 ok "$PARTITION mounted with $OPTION"
             fi
-        fi       
+        fi
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$PARTITION is correctly set"
-    elif [ $FNRET = 2 ]; then
+    elif [ "$FNRET" = 2 ]; then
         crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
-    elif [ $FNRET = 1 ]; then
+    elif [ "$FNRET" = 1 ]; then
         info "Adding $OPTION to fstab"
-        add_option_to_fstab $PARTITION $OPTION
+        add_option_to_fstab "$PARTITION" "$OPTION"
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    elif [ $FNRET = 3 ]; then
+    elif [ "$FNRET" = 3 ]; then
         info "Remounting $PARTITION from fstab"
-        remount_partition $PARTITION
+        remount_partition "$PARTITION"
-    fi 
+    fi
 }
 
 # This function will check config parameters required
@@ -70,17 +73,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.3.1_install_sudo.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.3.1 Ensure sudo is installed (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+DESCRIPTION="Install sudo to permit users to execute command as superuser or as another user."
+
+PACKAGE='sudo'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    is_pkg_installed "$PACKAGE"
+    if [ "$FNRET" != 0 ]; then
+        crit "$PACKAGE is not installed!"
+    else
+        ok "$PACKAGE is installed"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    is_pkg_installed "$PACKAGE"
+    if [ "$FNRET" = 0 ]; then
+        ok "$PACKAGE is installed"
+    else
+        crit "$PACKAGE is absent, installing it"
+        apt_install "$PACKAGE"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.3.2_pty_sudo.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.3.2 Ensure sudo commands use pty (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+DESCRIPTION="Ensure sudo can only be run from a pseudo pty."
+
+PATTERN='^\s*Defaults\s+([^#]+,\s*)?use_pty(,\s+\S+\s*)*(\s+#.*)?$'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    FOUND=0
+    for f in /etc/{sudoers,sudoers.d/*}; do
+        does_pattern_exist_in_file_nocase "$f" "$PATTERN"
+        if [ "$FNRET" = 0 ]; then
+            FOUND=1
+        fi
+    done
+
+    if [[ "$FOUND" = 1 ]]; then
+        ok "Defaults use_pty found in sudoers file"
+    else
+        crit "Defaults use_pty not found in sudoers files"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    FOUND=0
+    for f in /etc/{sudoers,sudoers.d/*}; do
+        does_pattern_exist_in_file_nocase "$f" "$PATTERN"
+        if [ "$FNRET" = 0 ]; then
+            FOUND=1
+        fi
+    done
+
+    if [[ "$FOUND" = 1 ]]; then
+        ok "Defaults use_pty found in sudoers file"
+    else
+        warn "Defaults use_pty not found in sudoers files, fixing"
+        add_line_file_before_pattern /etc/sudoers "Defaults        use_pty" "# Host alias specification"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.3.3_logfile_sudo.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.3.3 Ensure sudo log file exists (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+DESCRIPTION="Ensure sudo log files exists."
+
+PATTERN="^\s*Defaults\s+logfile=\S+"
+LOGFILE="/var/log/sudo.log"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    FOUND=0
+    for f in /etc/{sudoers,sudoers.d/*}; do
+        does_pattern_exist_in_file_nocase "$f" "$PATTERN"
+        if [ "$FNRET" = 0 ]; then
+            FOUND=1
+        fi
+    done
+
+    if [[ "$FOUND" = 1 ]]; then
+        ok "Defaults log file found in sudoers file"
+    else
+        crit "Defaults log file not found in sudoers files"
+    fi
+}
+# This function will be called if the script status is on enabled mode
+apply() {
+    FOUND=0
+    for f in /etc/{sudoers,sudoers.d/*}; do
+        does_pattern_exist_in_file_nocase "$f" "$PATTERN"
+        if [ "$FNRET" = 0 ]; then
+            FOUND=1
+        fi
+    done
+
+    if [[ "$FOUND" = 1 ]]; then
+        ok "Defaults log file found in sudoers file"
+    else
+        warn "Defaults log file not found in sudoers files, fixing"
+        add_line_file_before_pattern /etc/sudoers "Defaults        logfile=\"$LOGFILE\"" "# Host alias specification"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.4.1_install_tripwire.sh

@@ -1,26 +1,30 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 8.3.1 Install tripwire package (Scored)
+# 1.4.1 Ensure tripwire is installed (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=4
+# shellcheck disable=2034
 DESCRIPTION="Ensure tripwire package is installed."
 
-# NB : in CIS, AIDE has been chosen, however we chose tripwire
+# Note : in CIS, AIDE has been chosen, however we chose tripwire
+
 PACKAGE='tripwire'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$PACKAGE is not installed!"
     else
         ok "$PACKAGE is installed"
@@ -28,15 +32,15 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-        is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
-            ok "$PACKAGE is installed"
+        ok "$PACKAGE is installed"
-        else
+    else
-            crit "$PACKAGE is absent, installing it"
+        crit "$PACKAGE is absent, installing it"
-            apt_install $PACKAGE
+        apt_install "$PACKAGE"
-            info "Tripwire is now installed but not fully functionnal, please see readme to go further"
+        info "Tripwire is now installed but not fully functionnal, please see readme to go further"
-        fi
+    fi
 }
 
 # This function will check config parameters required
@@ -46,17 +50,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.4.2_tripwire_cron.sh

@@ -6,7 +6,7 @@
 #
 
 #
-# 8.3.2 Implement Periodic Execution of File Integrity (Scored)
+# 1.4.2 Ensure filesysteme integrity is regularly checked (Scored)
 #
 
 set -e # One error, it's over
@@ -17,12 +17,14 @@ HARDENING_LEVEL=4
 # shellcheck disable=2034
 DESCRIPTION="Implemet periodic execution of file integrity."
 
+# Note : in CIS, AIDE has been chosen, however we chose tripwire
+
 FILES="/etc/crontab"
 DIRECTORY="/etc/cron.d"
 PATTERN='tripwire --check'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     FILES="$FILES $($SUDO_CMD find $DIRECTORY -type f)"
     FOUND=0
     for FILE in $FILES; do
@@ -39,7 +41,7 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     FILES="$FILES $($SUDO_CMD find $DIRECTORY -type f)"
     FOUND=0
     for FILE in $FILES; do
@@ -50,7 +52,7 @@ apply () {
     done
     if [ "$FOUND" != 1 ]; then
         warn "$PATTERN is not present in $FILES, setting tripwire cron"
-        echo "0 10 * * * root /usr/sbin/tripwire --check > /dev/shm/tripwire_check 2>&1 " > /etc/cron.d/CIS_8.3.2_tripwire
+        echo "0 10 * * * root /usr/sbin/tripwire --check > /dev/shm/tripwire_check 2>&1 " >/etc/cron.d/CIS_8.3.2_tripwire
     else
         ok "$PATTERN is present in $FILES"
     fi
@@ -63,17 +65,18 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
 if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    # shellcheck source=/opt/debian-cis/lib/main.sh
+    # shellcheck source=../../lib/main.sh
     . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"

bin/hardening/1.5.1_bootloader_ownership.sh

@@ -1,17 +1,20 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.4.1 Ensure permissions on bootloader config are configured (Scored)
+# 1.5.1 Ensure permissions on bootloader config are configured (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=1
+# shellcheck disable=2034
 DESCRIPTION="User and group root owner of grub bootloader config."
 
 # Assertion : Grub Based.
@@ -22,38 +25,38 @@ GROUP='root'
 PERMISSIONS='400'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    has_file_correct_ownership $FILE $USER $GROUP
+    has_file_correct_ownership "$FILE" "$USER" "$GROUP"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$FILE has correct ownership"
     else
         crit "$FILE ownership was not set to $USER:$GROUP"
-    fi 
+    fi
 
-    has_file_correct_permissions $FILE $PERMISSIONS
+    has_file_correct_permissions "$FILE" "$PERMISSIONS"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$FILE has correct permissions"
     else
         crit "$FILE permissions were not set to $PERMISSIONS"
-    fi 
+    fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    has_file_correct_ownership $FILE $USER $GROUP
+    has_file_correct_ownership "$FILE" "$USER" "$GROUP"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$FILE has correct ownership"
     else
         info "fixing $FILE ownership to $USER:$GROUP"
-        chown $USER:$GROUP $FILE
+        chown "$USER":"$GROUP" "$FILE"
     fi
 
-    has_file_correct_permissions $FILE $PERMISSIONS
+    has_file_correct_permissions "$FILE" "$PERMISSIONS"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         ok "$FILE has correct permissions"
     else
         info "fixing $FILE permissions to $PERMISSIONS"
-        chmod 0$PERMISSIONS $FILE
+        chmod 0"$PERMISSIONS" "$FILE"
     fi
 }
 
@@ -61,22 +64,22 @@ apply () {
 check_config() {
 
     is_pkg_installed "grub-pc"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         warn "Grub is not installed, not handling configuration"
         exit 128
     fi
-    does_user_exist $USER
+    does_user_exist "$USER"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$USER does not exist"
         exit 128
     fi
-    does_group_exist $GROUP
+    does_group_exist "$GROUP"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$GROUP does not exist"
         exit 128
     fi
-    does_file_exist $FILE
+    does_file_exist "$FILE"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$FILE does not exist"
         exit 128
     fi
@@ -84,17 +87,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.5.2_bootloader_password.sh

@@ -1,17 +1,20 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.4.2 Ensure bootloader password is set (Scored)
+# 1.5.2 Ensure bootloader password is set (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Setting bootloader password to secure boot parameters."
 
 FILE='/boot/grub/grub.cfg'
@@ -19,15 +22,15 @@ USER_PATTERN="^set superusers"
 PWD_PATTERN="^password_pbkdf2"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    does_pattern_exist_in_file $FILE "$USER_PATTERN"
+    does_pattern_exist_in_file "$FILE" "$USER_PATTERN"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$USER_PATTERN not present in $FILE"
     else
         ok "$USER_PATTERN is present in $FILE"
     fi
-    does_pattern_exist_in_file $FILE "$PWD_PATTERN"
+    does_pattern_exist_in_file "$FILE" "$PWD_PATTERN"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$PWD_PATTERN not present in $FILE"
     else
         ok "$PWD_PATTERN is present in $FILE"
@@ -35,15 +38,15 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    does_pattern_exist_in_file $FILE "$USER_PATTERN"
+    does_pattern_exist_in_file "$FILE" "$USER_PATTERN"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         warn "$USER_PATTERN not present in $FILE, please configure password for grub"
     else
         ok "$USER_PATTERN is present in $FILE"
     fi
-    does_pattern_exist_in_file $FILE "$PWD_PATTERN"
+    does_pattern_exist_in_file "$FILE" "$PWD_PATTERN"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         warn "$PWD_PATTERN not present in $FILE, please configure password for grub"
     else
         ok "$PWD_PATTERN is present in $FILE"
@@ -54,11 +57,11 @@ apply () {
 # This function will check config parameters required
 check_config() {
     is_pkg_installed "grub-pc"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         warn "grub-pc is not installed, not handling configuration"
         exit 128
     fi
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$FILE does not exist"
         exit 128
     fi
@@ -66,17 +69,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.5.3_root_password.sh

@@ -1,26 +1,29 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.4.3 Ensure authentication required for single user mode (Scored)
+# 1.5.3 Ensure authentication required for single user mode (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Root password for single user mode."
 
 FILE="/etc/shadow"
 PATTERN="^root:[*\!]:"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    does_pattern_exist_in_file $FILE $PATTERN
+    does_pattern_exist_in_file "$FILE" "$PATTERN"
-    if [ $FNRET != 1 ]; then
+    if [ "$FNRET" != 1 ]; then
         crit "$PATTERN is present in $FILE"
     else
         ok "$PATTERN is not present in $FILE"
@@ -28,9 +31,9 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    does_pattern_exist_in_file $FILE $PATTERN
+    does_pattern_exist_in_file "$FILE" "$PATTERN"
-    if [ $FNRET != 1 ]; then
+    if [ "$FNRET" != 1 ]; then
         warn "$PATTERN is present in $FILE, please put a root password"
     else
         ok "$PATTERN is not present in $FILE"
@@ -45,17 +48,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.6.1_enable_nx_support.sh

@@ -1,17 +1,20 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.5.2 Ensure XD/NX support is enabled (Not Scored)
+# 1.6.1 Ensure XD/NX support is enabled (Not Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Enable NoExecute/ExecuteDisable to prevent buffer overflow attacks."
 
 PATTERN='NX[[:space:]]\(Execute[[:space:]]Disable\)[[:space:]]protection:[[:space:]]active'
@@ -31,11 +34,11 @@ nx_supported_and_enabled() {
 }
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    does_pattern_exist_in_dmesg $PATTERN
+    does_pattern_exist_in_dmesg "$PATTERN"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         nx_supported_and_enabled
-        if [ $FNRET != 0 ]; then
+        if [ "$FNRET" != 0 ]; then
             crit "$PATTERN is not present in dmesg and NX seems unsupported or disabled"
         else
             ok "NX is supported and enabled"
@@ -46,11 +49,11 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    does_pattern_exist_in_dmesg $PATTERN
+    does_pattern_exist_in_dmesg "$PATTERN"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         nx_supported_and_enabled
-        if [ $FNRET != 0 ]; then
+        if [ "$FNRET" != 0 ]; then
             crit "$PATTERN is not present in dmesg and NX seems unsupported or disabled"
         else
             ok "NX is supported and enabled"
@@ -67,17 +70,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.6.2_enable_randomized_vm_placement.sh

@@ -1,28 +1,31 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.5.3 Ensure address space layout randomization (ASLR) is enabled (Scored)
+# 1.6.2 Ensure address space layout randomization (ASLR) is enabled (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Enable Randomized Virtual Memory Region Placement to prevent memory page exploits."
 
 SYSCTL_PARAM='kernel.randomize_va_space'
 SYSCTL_EXP_RESULT=2
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+    has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT"
-    elif [ $FNRET = 255 ]; then
+    elif [ "$FNRET" = 255 ]; then
         warn "$SYSCTL_PARAM does not exist -- Typo?"
     else
         ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
@@ -30,12 +33,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+    has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         warn "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT -- Fixing"
-        set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+        set_sysctl_param "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-    elif [ $FNRET = 255 ]; then
+    elif [ "$FNRET" = 255 ]; then
         warn "$SYSCTL_PARAM does not exist -- Typo?"
     else
         ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
@@ -49,17 +52,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.6.3_disable_prelink.sh

@@ -1,25 +1,28 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.5.4 Ensure prelink is disabled (Scored)
+# 1.6.3 Ensure prelink is disabled (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Disable prelink to prevent libraries compromission."
 
 PACKAGE='prelink'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$PACKAGE is installed!"
     else
         ok "$PACKAGE is absent"
@@ -28,12 +31,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$PACKAGE is installed, purging it"
         /usr/sbin/prelink -ua
-        apt-get purge $PACKAGE -y
+        apt-get purge "$PACKAGE" -y
         apt-get autoremove
     else
         ok "$PACKAGE is absent"
@@ -48,17 +51,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.6.4_restrict_core_dumps.sh

@@ -1,17 +1,20 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.5.1 Ensure core dumps are restricted (Scored)
+# 1.6.4 Ensure core dumps are restricted (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Restrict core dumps."
 
 LIMIT_FILE='/etc/security/limits.conf'
@@ -21,18 +24,18 @@ SYSCTL_PARAM='fs.suid_dumpable'
 SYSCTL_EXP_RESULT=0
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     SEARCH_RES=0
     LIMIT_FILES=""
-    if $SUDO_CMD [ -d $LIMIT_DIR ]; then
+    if $SUDO_CMD [ -d "$LIMIT_DIR" ]; then
-        for file in $($SUDO_CMD ls $LIMIT_DIR/*.conf 2>/dev/null); do
+        for file in $($SUDO_CMD ls "$LIMIT_DIR"/*.conf 2>/dev/null); do
-            LIMIT_FILES="$LIMIT_FILES $LIMIT_DIR/$file"
+            LIMIT_FILES="$LIMIT_FILES $file"
         done
     fi
     debug "Files to search $LIMIT_FILE $LIMIT_FILES"
     for file in $LIMIT_FILE $LIMIT_FILES; do
-        does_pattern_exist_in_file $file $LIMIT_PATTERN
+        does_pattern_exist_in_file "$file" "$LIMIT_PATTERN"
-        if [ $FNRET != 0 ]; then
+        if [ "$FNRET" != 0 ]; then
             debug "$LIMIT_PATTERN not present in $file"
         else
             ok "$LIMIT_PATTERN present in $file"
@@ -40,13 +43,13 @@ audit () {
             break
         fi
     done
-    if [ $SEARCH_RES = 0 ]; then
+    if [ "$SEARCH_RES" = 0 ]; then
         crit "$LIMIT_PATTERN is not present in $LIMIT_FILE $LIMIT_FILES"
     fi
     has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT"
-    elif [ $FNRET = 255 ]; then
+    elif [ "$FNRET" = 255 ]; then
         warn "$SYSCTL_PARAM does not exist -- Typo?"
     else
         ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
@@ -54,23 +57,23 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    does_pattern_exist_in_file $LIMIT_FILE $LIMIT_PATTERN
+    does_pattern_exist_in_file "$LIMIT_FILE" "$LIMIT_PATTERN"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         warn "$LIMIT_PATTERN not present in $LIMIT_FILE, adding at the end of  $LIMIT_FILE"
         add_end_of_file $LIMIT_FILE "* hard core 0"
     else
         ok "$LIMIT_PATTERN present in $LIMIT_FILE"
     fi
     has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         warn "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT -- Fixing"
-        set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+        set_sysctl_param "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-    elif [ $FNRET = 255 ]; then
+    elif [ "$FNRET" = 255 ]; then
         warn "$SYSCTL_PARAM does not exist -- Typo?"
     else
         ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
-    fi 
+    fi
 
 }
 
@@ -81,17 +84,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.7.1.1_install_apparmor.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.7.1.1 Ensure AppArmor is installed (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Install AppArmor."
+
+PACKAGES='apparmor apparmor-utils'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" != 0 ]; then
+            crit "$PACKAGE is absent!"
+        else
+            ok "$PACKAGE is installed"
+        fi
+    done
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" = 0 ]; then
+            ok "$PACKAGE is installed"
+        else
+            crit "$PACKAGE is absent, installing it"
+            apt_install "$PACKAGE"
+        fi
+    done
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.7.1.2_enable_apparmor.sh

@@ -0,0 +1,111 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.7.2.2 Ensure AppArmor is enabled in the bootloader configuration (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Activate AppArmor to enforce permissions control."
+
+PACKAGES='apparmor apparmor-utils'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" != 0 ]; then
+            crit "$PACKAGE is absent!"
+        else
+            ok "$PACKAGE is installed"
+        fi
+    done
+
+    ERROR=0
+    RESULT=$($SUDO_CMD grep "^\s*linux" /boot/grub/grub.cfg)
+
+    # define custom IFS and save default one
+    d_IFS=$IFS
+    c_IFS=$'\n'
+    IFS=$c_IFS
+    for line in $RESULT; do
+        if [[ ! "$line" =~ "apparmor=1" ]] || [[ ! "$line" =~ "security=apparmor" ]]; then
+            crit "$line is not configured"
+            ERROR=1
+        fi
+    done
+    IFS=$d_IFS
+    if [ "$ERROR" = 0 ]; then
+        ok "$PACKAGES are configured"
+
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" = 0 ]; then
+            ok "$PACKAGE is installed"
+        else
+            crit "$PACKAGE is absent, installing it"
+            apt_install "$PACKAGE"
+        fi
+    done
+
+    ERROR=0
+    RESULT=$($SUDO_CMD grep "^\s*linux" /boot/grub/grub.cfg)
+
+    # define custom IFS and save default one
+    d_IFS=$IFS
+    c_IFS=$'\n'
+    IFS=$c_IFS
+    for line in $RESULT; do
+        if [[ ! $line =~ "apparmor=1" ]] || [[ ! $line =~ "security=apparmor" ]]; then
+            crit "$line is not configured"
+            ERROR=1
+        fi
+    done
+    IFS=$d_IFS
+
+    if [ $ERROR = 1 ]; then
+        $SUDO_CMD sed -i "s/GRUB_CMDLINE_LINUX=\"/GRUB_CMDLINE_LINUX=\"apparmor=1 security=apparmor /" /etc/default/grub
+        $SUDO_CMD update-grub
+    else
+        ok "$PACKAGES are configured"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.7.1.3_enforce_or_complain_apparmor.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.7.1.3 Ensure all AppArmor profiles are in enforce or complain mode (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Enforce or complain AppArmor profiles."
+
+PACKAGES='apparmor apparmor-utils'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" != 0 ]; then
+            crit "$PACKAGE is absent!"
+        else
+            ok "$PACKAGE is installed"
+        fi
+    done
+
+    RESULT_UNCONFINED=$($SUDO_CMD apparmor_status | grep "^0 processes are unconfined but have a profile defined")
+
+    if [ -n "$RESULT_UNCONFINED" ]; then
+        ok "No profiles are unconfined"
+
+    else
+        crit "Some processes are unconfined while they have defined profile"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" != 0 ]; then
+            crit "$PACKAGES is absent!"
+        else
+            ok "$PACKAGE is installed"
+        fi
+    done
+
+    RESULT_UNCONFINED=$(apparmor_status | grep "^0 processes are unconfined but have a profile defined")
+
+    if [ -n "$RESULT_UNCONFINED" ]; then
+        ok "No profiles are unconfined"
+    else
+        warn "Some processes are unconfined while they have defined profile, setting profiles to complain mode"
+        aa-complain /etc/apparmor.d/*
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.7.1.4_enforcing_apparmor.sh

@@ -0,0 +1,101 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.7.1.4 Ensure all AppArmor profiles are enforcing (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Enforce Apparmor profiles."
+
+PACKAGES='apparmor apparmor-utils'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" != 0 ]; then
+            crit "$PACKAGE is absent!"
+        else
+            ok "$PACKAGE is installed"
+        fi
+    done
+
+    RESULT_UNCONFINED=$($SUDO_CMD apparmor_status | grep "^0 processes are unconfined but have a profile defined")
+    RESULT_COMPLAIN=$($SUDO_CMD apparmor_status | grep "^0 profiles are in complain mode.")
+
+    if [ -n "$RESULT_UNCONFINED" ]; then
+        ok "No profiles are unconfined"
+    else
+        crit "Some processes are unconfined while they have defined profile"
+    fi
+
+    if [ -n "$RESULT_COMPLAIN" ]; then
+        ok "No profiles are in complain mode"
+    else
+        crit "Some processes are in complain mode"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" != 0 ]; then
+            crit "$PACKAGE is absent!"
+        else
+            ok "$PACKAGE is installed"
+        fi
+    done
+
+    RESULT_UNCONFINED=$(apparmor_status | grep "^0 processes are unconfined but have a profile defined")
+    RESULT_COMPLAIN=$(apparmor_status | grep "^0 profiles are in complain mode.")
+
+    if [ -n "$RESULT_UNCONFINED" ]; then
+        ok "No profiles are unconfined"
+    else
+        warn "Some processes are unconfined while they have defined profile, setting profiles to enforce mode"
+        aa-enforce /etc/apparmor.d/*
+    fi
+
+    if [ -n "$RESULT_COMPLAIN" ]; then
+        ok "No profiles are in complain mode"
+    else
+        warn "Some processes are in complain mode, setting profiles to enforce mode"
+        aa-enforce /etc/apparmor.d/*
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.7.1.6_etc_issue_net_perms.sh

@@ -1,87 +0,0 @@
-#!/bin/bash
-
-#
-# CIS Debian Hardening
-#
-
-#
-# 1.7.1.6 Ensure permissions on /etc/issue.net are configured (Scored)
-#
-
-set -e # One error, it's over
-set -u # One variable unset, it's over
-
-HARDENING_LEVEL=3
-DESCRIPTION="Checking root ownership and 644 permissions on banner files: /etc/motd|issue|issue.net ."
-
-PERMISSIONS='644'
-USER='root'
-GROUP='root'
-FILE='/etc/issue.net'
-
-# This function will be called if the script status is on enabled / audit mode
-audit () {
-    does_file_exist $FILE
-    if [ $FNRET != 0 ]; then
-        crit "$FILE does not exist"
-        continue
-    fi
-    has_file_correct_ownership $FILE $USER $GROUP
-    if [ $FNRET = 0 ]; then
-        ok "$FILE has correct ownership"
-    else
-        crit "$FILE ownership was not set to $USER:$GROUP"
-    fi
-    has_file_correct_permissions $FILE $PERMISSIONS
-    if [ $FNRET = 0 ]; then
-        ok "$FILE has correct permissions"
-    else
-        crit "$FILE permissions were not set to $PERMISSIONS"
-    fi
-}
-
-# This function will be called if the script status is on enabled mode
-apply () {
-    does_file_exist $FILE
-    if [ $FNRET != 0 ]; then
-        info "$FILE does not exist"
-        touch $FILE
-    fi
-    has_file_correct_ownership $FILE $USER $GROUP
-    if [ $FNRET = 0 ]; then
-        ok "$FILE has correct ownership"
-    else
-        warn "fixing $FILE ownership to $USER:$GROUP"
-        chown $USER:$GROUP $FILE
-    fi
-    has_file_correct_permissions $FILE $PERMISSIONS
-    if [ $FNRET = 0 ]; then
-        ok "$FILE has correct permissions"
-    else
-        info "fixing $FILE permissions to $PERMISSIONS"
-        chmod 0$PERMISSIONS $FILE
-    fi
-}
-
-# This function will check config parameters required
-check_config() {
-    :
-}
-
-# Source Root Dir Parameter
-if [ -r /etc/default/cis-hardening ]; then
-    . /etc/default/cis-hardening
-fi
-if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
-    exit 128
-fi
-
-# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
-else
-    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
-    exit 128
-fi

bin/hardening/1.8.1.1_remove_os_info_motd.sh

@@ -1,26 +1,29 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.7.1.1 Ensure message of the day is configured properly (Scored)
+# 1.8.1.1 Ensure message of the day is configured properly (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Remove OS information from motd"
 
 FILE='/etc/motd'
 PATTERN='(\\v|\\r|\\m|\\s)'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    does_pattern_exist_in_file $FILE "$PATTERN"
+    does_pattern_exist_in_file "$FILE" "$PATTERN"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$PATTERN is present in $FILE"
     else
         ok "$PATTERN is not present in $FILE"
@@ -28,11 +31,11 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    does_pattern_exist_in_file $FILE "$PATTERN"
+    does_pattern_exist_in_file "$FILE" "$PATTERN"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         warn "$PATTERN is present in $FILE"
-        delete_line_in_file $FILE $PATTERN
+        delete_line_in_file "$FILE" "$PATTERN"
     else
         ok "$PATTERN is not present in $FILE"
     fi
@@ -45,17 +48,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.8.1.2_remove_os_info_issue.sh

@@ -1,26 +1,29 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.7.1.2 Ensure local login warning banner is configured properly (Scored)
+# 1.8.1.2 Ensure local login warning banner is configured properly (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Remove OS information from Login Warning Banners."
 
 FILE='/etc/issue'
 PATTERN='(\\v|\\r|\\m|\\s)'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    does_pattern_exist_in_file $FILE "$PATTERN"
+    does_pattern_exist_in_file "$FILE" "$PATTERN"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$PATTERN is present in $FILE"
     else
         ok "$PATTERN is not present in $FILE"
@@ -28,11 +31,11 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     does_pattern_exist_in_file $FILE "$PATTERN"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         warn "$PATTERN is present in $FILE"
-        delete_line_in_file $FILE $PATTERN
+        delete_line_in_file "$FILE" "$PATTERN"
     else
         ok "$PATTERN is not present in $FILE"
     fi
@@ -45,17 +48,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.8.1.3_remove_os_info_issue_net.sh

@@ -1,26 +1,29 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.7.1.3 Ensure remote login warning banner is configured properly (Scored)
+# 1.8.1.3 Ensure remote login warning banner is configured properly (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Remove OS information from remote Login Warning Banners."
 
 FILE='/etc/issue.net'
 PATTERN='(\\v|\\r|\\m|\\s)'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    does_pattern_exist_in_file $FILE "$PATTERN"
+    does_pattern_exist_in_file "$FILE" "$PATTERN"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$PATTERN is present in $FILE"
     else
         ok "$PATTERN is not present in $FILE"
@@ -28,11 +31,11 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    does_pattern_exist_in_file $FILE "$PATTERN"
+    does_pattern_exist_in_file "$FILE" "$PATTERN"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         warn "$PATTERN is present in $FILE"
-        delete_line_in_file $FILE $PATTERN
+        delete_line_in_file "$FILE" "$PATTERN"
     else
         ok "$PATTERN is not present in $FILE"
     fi
@@ -45,17 +48,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.8.1.4_motd_perms.sh

@@ -0,0 +1,92 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.8.1.4 Ensure permissions on /etc/motd are configured (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Checking root ownership and 644 permissions on banner files: /etc/motd|issue|issue.net ."
+
+PERMISSIONS='644'
+USER='root'
+GROUP='root'
+FILE='/etc/motd'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    does_file_exist "$FILE"
+    if [ "$FNRET" != 0 ]; then
+        crit "$FILE does not exist"
+    else
+        has_file_correct_ownership "$FILE" "$USER" "$GROUP"
+        if [ "$FNRET" = 0 ]; then
+            ok "$FILE has correct ownership"
+        else
+            crit "$FILE ownership was not set to $USER:$GROUP"
+        fi
+        has_file_correct_permissions "$FILE" "$PERMISSIONS"
+        if [ "$FNRET" = 0 ]; then
+            ok "$FILE has correct permissions"
+        else
+            crit "$FILE permissions were not set to $PERMISSIONS"
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    does_file_exist "$FILE"
+    if [ "$FNRET" != 0 ]; then
+        info "$FILE does not exist"
+        touch "$FILE"
+    fi
+    has_file_correct_ownership "$FILE" "$USER" "$GROUP"
+    if [ "$FNRET" = 0 ]; then
+        ok "$FILE has correct ownership"
+    else
+        warn "fixing $FILE ownership to $USER:$GROUP"
+        chown "$USER":"$GROUP" "$FILE"
+    fi
+    has_file_correct_permissions "$FILE" "$PERMISSIONS"
+    if [ "$FNRET" = 0 ]; then
+        ok "$FILE has correct permissions"
+    else
+        info "fixing $FILE permissions to $PERMISSIONS"
+        chmod 0"$PERMISSIONS" "$FILE"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.8.1.5_etc_issue_perms.sh

@@ -0,0 +1,92 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.8.1.5 Ensure permissions on /etc/issue are configured (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Checking root ownership and 644 permissions on banner files: /etc/motd|issue|issue.net ."
+
+PERMISSIONS='644'
+USER='root'
+GROUP='root'
+FILE='/etc/issue'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    does_file_exist "$FILE"
+    if [ "$FNRET" != 0 ]; then
+        crit "$FILE does not exist"
+    else
+        has_file_correct_ownership "$FILE" "$USER" "$GROUP"
+        if [ "$FNRET" = 0 ]; then
+            ok "$FILE has correct ownership"
+        else
+            crit "$FILE ownership was not set to $USER:$GROUP"
+        fi
+        has_file_correct_permissions "$FILE" "$PERMISSIONS"
+        if [ "$FNRET" = 0 ]; then
+            ok "$FILE has correct permissions"
+        else
+            crit "$FILE permissions were not set to $PERMISSIONS"
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    does_file_exist "$FILE"
+    if [ "$FNRET" != 0 ]; then
+        info "$FILE does not exist"
+        touch "$FILE"
+    fi
+    has_file_correct_ownership "$FILE" "$USER" "$GROUP"
+    if [ "$FNRET" = 0 ]; then
+        ok "$FILE has correct ownership"
+    else
+        warn "fixing $FILE ownership to $USER:$GROUP"
+        chown "$USER":"$GROUP" "$FILE"
+    fi
+    has_file_correct_permissions "$FILE" "$PERMISSIONS"
+    if [ "$FNRET" = 0 ]; then
+        ok "$FILE has correct permissions"
+    else
+        info "fixing $FILE permissions to $PERMISSIONS"
+        chmod 0"$PERMISSIONS" "$FILE"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.8.1.6_etc_issue_net_perms.sh

@@ -0,0 +1,92 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 1.8.1.6 Ensure permissions on /etc/issue.net are configured (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Checking root ownership and 644 permissions on banner files: /etc/motd|issue|issue.net ."
+
+PERMISSIONS='644'
+USER='root'
+GROUP='root'
+FILE='/etc/issue.net'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    does_file_exist "$FILE"
+    if [ "$FNRET" != 0 ]; then
+        crit "$FILE does not exist"
+    else
+        has_file_correct_ownership "$FILE" "$USER" "$GROUP"
+        if [ "$FNRET" = 0 ]; then
+            ok "$FILE has correct ownership"
+        else
+            crit "$FILE ownership was not set to $USER:$GROUP"
+        fi
+        has_file_correct_permissions "$FILE" "$PERMISSIONS"
+        if [ "$FNRET" = 0 ]; then
+            ok "$FILE has correct permissions"
+        else
+            crit "$FILE permissions were not set to $PERMISSIONS"
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    does_file_exist "$FILE"
+    if [ "$FNRET" != 0 ]; then
+        info "$FILE does not exist"
+        touch "$FILE"
+    fi
+    has_file_correct_ownership "$FILE" "$USER" "$GROUP"
+    if [ "$FNRET" = 0 ]; then
+        ok "$FILE has correct ownership"
+    else
+        warn "fixing $FILE ownership to $USER:$GROUP"
+        chown "$USER":"$GROUP" "$FILE"
+    fi
+    has_file_correct_permissions "$FILE" "$PERMISSIONS"
+    if [ "$FNRET" = 0 ]; then
+        ok "$FILE has correct permissions"
+    else
+        info "fixing $FILE permissions to $PERMISSIONS"
+        chmod 0"$PERMISSIONS" "$FILE"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/1.8.2_graphical_warning_banners.sh

@@ -1,26 +1,29 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.7.2 Ensure GDM login banner is configured (Scored)
+# 1.8.2 Ensure GDM login banner is configured (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Set graphical warning banner."
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Not implemented yet"
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     info "Not implemented yet"
 }
 
@@ -31,17 +34,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/1.9_install_updates.sh

@@ -1,26 +1,29 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 1.8 Ensure updates, patches and additional security software are installed (Not Scored)
+# 1.9 Ensure updates, patches and additional security software are installed (Not Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure updates, patches, and additional security software are installed (Not Scored)"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Checking if apt needs an update"
-    apt_update_if_needed 
+    apt_update_if_needed
     info "Fetching upgrades ..."
     apt_check_updates "CIS_APT"
-    if [ $FNRET -gt 0 ]; then
+    if [ "$FNRET" -gt 0 ]; then
         crit "$RESULT"
         FNRET=1
     else
@@ -30,8 +33,8 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    if [ $FNRET -gt 0 ]; then 
+    if [ "$FNRET" -gt 0 ]; then
         info "Applying Upgrades..."
         DEBIAN_FRONTEND='noninteractive' apt-get -o Dpkg::Options::='--force-confdef' -o Dpkg::Options::='--force-confold' upgrade -y
     else
@@ -47,17 +50,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.1.1_disable_xinetd.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,15 +12,17 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure xinetd is not enabled."
 
 PACKAGE='xinetd'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$PACKAGE is installed"
     else
         ok "$PACKAGE is absent"
@@ -27,11 +30,11 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         warn "$PACKAGE is installed, purging"
-        apt-get purge $PACKAGE -y
+        apt-get purge "$PACKAGE" -y
         apt-get autoremove
     else
         ok "$PACKAGE is absent"
@@ -45,17 +48,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.1.2_disable_bsd_inetd.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,16 +12,18 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure bsd-inetd is not enabled."
 
 PACKAGES='openbsd-inetd inetutils-inetd'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed"
         else
             ok "$PACKAGE is absent"
@@ -29,12 +32,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             warn "$PACKAGE is installed, purging"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
             apt-get autoremove
         else
             ok "$PACKAGE is absent"
@@ -49,17 +52,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.1.1_use_time_sync.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,28 +12,30 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure time synchronization is in use"
 
 PACKAGES="ntp chrony"
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     FOUND=false
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             ok "Time synchronization is available through $PACKAGE"
             FOUND=true
         fi
     done
-    if [  "$FOUND" = false ]; then
+    if [ "$FOUND" = false ]; then
         crit "None of the following time sync packages are installed: $PACKAGES"
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     :
 }
 
@@ -43,14 +46,20 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-[ -r "$CIS_ROOT_DIR"/lib/main.sh ] && . $CIS_ROOT_DIR/lib/main.sh
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/2.2.1.2_configure_ntp.sh

@@ -1,95 +0,0 @@
-#!/bin/bash
-
-#
-# CIS Debian Hardening
-#
-
-#
-# 2.2.1.2 Ensure ntp is configured (Scored)
-#
-
-set -e # One error, it's over
-set -u # One variable unset, it's over
-
-HARDENING_LEVEL=3
-DESCRIPTION="Configure Network Time Protocol (ntp). Check restrict parameters and ntp daemon runs ad unprivileged user."
-HARDENING_EXCEPTION=ntp
-
-PACKAGE='ntp'
-NTP_CONF_DEFAULT_PATTERN='^restrict -4 default (kod nomodify notrap nopeer noquery|ignore)'
-NTP_CONF_FILE='/etc/ntp.conf'
-NTP_INIT_PATTERN='RUNASUSER=ntp'
-NTP_INIT_FILE='/etc/init.d/ntp'
-
-# This function will be called if the script status is on enabled / audit mode
-audit () {
-    is_pkg_installed $PACKAGE
-    if [ $FNRET != 0 ]; then
-        crit "$PACKAGE is not installed!"
-    else
-        ok "$PACKAGE is installed, checking configuration"
-        does_pattern_exist_in_file $NTP_CONF_FILE $NTP_CONF_DEFAULT_PATTERN
-        if [ $FNRET != 0 ]; then
-            crit "$NTP_CONF_DEFAULT_PATTERN not found in $NTP_CONF_FILE"
-        else
-            ok "$NTP_CONF_DEFAULT_PATTERN found in $NTP_CONF_FILE"
-        fi
-        does_pattern_exist_in_file $NTP_INIT_FILE "^$NTP_INIT_PATTERN"
-        if [ $FNRET != 0 ]; then
-            crit "$NTP_INIT_PATTERN not found in $NTP_INIT_FILE"
-        else
-            ok "$NTP_INIT_PATTERN found in $NTP_INIT_FILE"
-        fi
-    fi
-}
-
-# This function will be called if the script status is on enabled mode
-apply () {
-        is_pkg_installed $PACKAGE
-        if [ $FNRET = 0 ]; then
-            ok "$PACKAGE is installed"
-        else
-            crit "$PACKAGE is absent, installing it"
-            apt_install $PACKAGE
-            info "Checking $PACKAGE configuration"
-        fi
-        does_pattern_exist_in_file $NTP_CONF_FILE $NTP_CONF_DEFAULT_PATTERN
-        if [ $FNRET != 0 ]; then
-            warn "$NTP_CONF_DEFAULT_PATTERN not found in $NTP_CONF_FILE, adding it"
-            backup_file $NTP_CONF_FILE
-            add_end_of_file $NTP_CONF_FILE "restrict -4 default kod notrap nomodify nopeer noquery"
-        else
-            ok "$NTP_CONF_DEFAULT_PATTERN found in $NTP_CONF_FILE"
-        fi
-        does_pattern_exist_in_file $NTP_INIT_FILE "^$NTP_INIT_PATTERN"
-        if [ $FNRET != 0 ]; then
-            warn "$NTP_INIT_PATTERN not found in $NTP_INIT_FILE, adding it"
-            backup_file $NTP_INIT_FILE
-            add_line_file_before_pattern $NTP_INIT_FILE $NTP_INIT_PATTERN "^UGID" 
-        else
-            ok "$NTP_INIT_PATTERN found in $NTP_INIT_FILE"
-        fi
-}
-
-# This function will check config parameters required
-check_config() {
-    :
-}
-
-# Source Root Dir Parameter
-if [ -r /etc/default/cis-hardening ]; then
-    . /etc/default/cis-hardening
-fi
-if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
-    exit 128
-fi
-
-# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
-else
-    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
-    exit 128
-fi

bin/hardening/2.2.1.2_configure_systemd-timesyncd.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 2.2.1.2 Ensure systemd-timesyncd is configured (Not Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=4
+# shellcheck disable=2034
+DESCRIPTION="Configure systemd-timesyncd."
+
+SERVICE_NAME="systemd-timesyncd"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    is_service_enabled "$SERVICE_NAME"
+    if [ "$FNRET" = 0 ]; then
+        ok "$SERVICE_NAME is enabled"
+    else
+        crit "$SERVICE_NAME is disabled"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    :
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/2.2.1.3_configure_chrony.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,8 +12,11 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Configure Network Time Protocol (ntp). Check restrict parameters and ntp daemon runs ad unprivileged user."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=ntp
 
 PACKAGE=chrony
@@ -20,14 +24,14 @@ CONF_DEFAULT_PATTERN='^(server|pool)'
 CONF_FILE='/etc/chrony/chrony.conf'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         crit "$PACKAGE is not installed!"
     else
         ok "$PACKAGE is installed, checking configuration"
-        does_pattern_exist_in_file $CONF_FILE $CONF_DEFAULT_PATTERN
+        does_pattern_exist_in_file "$CONF_FILE" "$CONF_DEFAULT_PATTERN"
-        if [ $FNRET != 0 ]; then
+        if [ "$FNRET" != 0 ]; then
             crit "$CONF_DEFAULT_PATTERN not found in $CONF_FILE"
         else
             ok "$CONF_DEFAULT_PATTERN found in $CONF_FILE"
@@ -36,7 +40,7 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     :
 }
 
@@ -47,17 +51,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.1.4_configure_ntp.sh

@@ -0,0 +1,101 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 2.2.1.2 Ensure ntp is configured (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Configure Network Time Protocol (ntp). Check restrict parameters and ntp daemon runs ad unprivileged user."
+# shellcheck disable=2034
+HARDENING_EXCEPTION=ntp
+
+PACKAGE='ntp'
+NTP_CONF_DEFAULT_PATTERN='^restrict -4 default (kod nomodify notrap nopeer noquery|ignore)'
+NTP_CONF_FILE='/etc/ntp.conf'
+NTP_INIT_PATTERN='RUNASUSER=ntp'
+NTP_INIT_FILE='/etc/init.d/ntp'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    is_pkg_installed "$PACKAGE"
+    if [ "$FNRET" != 0 ]; then
+        crit "$PACKAGE is not installed!"
+    else
+        ok "$PACKAGE is installed, checking configuration"
+        does_pattern_exist_in_file "$NTP_CONF_FILE" "$NTP_CONF_DEFAULT_PATTERN"
+        if [ "$FNRET" != 0 ]; then
+            crit "$NTP_CONF_DEFAULT_PATTERN not found in $NTP_CONF_FILE"
+        else
+            ok "$NTP_CONF_DEFAULT_PATTERN found in $NTP_CONF_FILE"
+        fi
+        does_pattern_exist_in_file "$NTP_INIT_FILE" "^$NTP_INIT_PATTERN"
+        if [ "$FNRET" != 0 ]; then
+            crit "$NTP_INIT_PATTERN not found in $NTP_INIT_FILE"
+        else
+            ok "$NTP_INIT_PATTERN found in $NTP_INIT_FILE"
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    is_pkg_installed "$PACKAGE"
+    if [ "$FNRET" = 0 ]; then
+        ok "$PACKAGE is installed"
+    else
+        crit "$PACKAGE is absent, installing it"
+        apt_install "$PACKAGE"
+        info "Checking $PACKAGE configuration"
+    fi
+    does_pattern_exist_in_file "$NTP_CONF_FILE" "$NTP_CONF_DEFAULT_PATTERN"
+    if [ "$FNRET" != 0 ]; then
+        warn "$NTP_CONF_DEFAULT_PATTERN not found in $NTP_CONF_FILE, adding it"
+        backup_file "$NTP_CONF_FILE"
+        add_end_of_file "$NTP_CONF_FILE" "restrict -4 default kod notrap nomodify nopeer noquery"
+    else
+        ok "$NTP_CONF_DEFAULT_PATTERN found in $NTP_CONF_FILE"
+    fi
+    does_pattern_exist_in_file "$NTP_INIT_FILE" "^$NTP_INIT_PATTERN"
+    if [ "$FNRET" != 0 ]; then
+        warn "$NTP_INIT_PATTERN not found in $NTP_INIT_FILE, adding it"
+        backup_file "$NTP_INIT_FILE"
+        add_line_file_before_pattern "$NTP_INIT_FILE" "$NTP_INIT_PATTERN" "^UGID"
+    else
+        ok "$NTP_INIT_PATTERN found in $NTP_INIT_FILE"
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/2.2.10_disable_http_server.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,18 +12,21 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure HTTP server is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=http
 
 # Based on aptitude search '~Phttpd'
 PACKAGES='nginx apache2 lighttpd micro-httpd mini-httpd yaws boa bozohttpd'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -31,13 +35,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -51,17 +55,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.11_disable_imap_pop.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,18 +12,21 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure IMAP and POP servers are not installed"
+# shellcheck disable=2034
 HARDENING_EXCEPTION=mail
 
 # Based on aptitude search '~Pimap-server' and  aptitude search '~Ppop3-server'
 PACKAGES='citadel-server courier-imap cyrus-imapd-2.4 dovecot-imapd mailutils-imap4d courier-pop cyrus-pop3d-2.4 dovecot-pop3d heimdal-servers mailutils-pop3d popa3d solid-pop3d xmail'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -31,13 +35,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -51,17 +55,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.12_disable_samba.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,25 +12,28 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure Samba is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=samba
 
 PACKAGES='samba'
 SERVICE='smbd'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
         fi
     done
-    is_service_enabled $SERVICE
+    is_service_enabled "$SERVICE"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "Service $SERVICE is enabled!"
     else
         ok "Service $SERVICE is disabled"
@@ -37,21 +41,21 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
     done
-    is_service_enabled $SERVICE
+    is_service_enabled "$SERVICE"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "Service $SERVICE is enabled!"
-        systemctl disable $SERVICE
+        systemctl disable "$SERVICE"
     else
         ok "Service $SERVICE is disabled"
     fi
@@ -64,17 +68,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.13_disable_http_proxy.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,17 +12,20 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure HTTP-proxy is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=http
 
 PACKAGES='squid3 squid'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -30,12 +34,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
             apt-get autoremove
         else
             ok "$PACKAGE is absent"
@@ -50,17 +54,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.14_disable_snmp_server.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,17 +12,20 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Enure SNMP server is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=snmp
 
 PACKAGES='snmpd'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -30,13 +34,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -50,17 +54,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.15_mta_localhost.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,12 +12,15 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Configure Mail Transfert Agent for Local-Only Mode."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=mail
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Checking netport ports opened"
     RESULT=$($SUDO_CMD netstat -an | grep LIST | grep ":25[[:space:]]") || :
     RESULT=${RESULT:-}
@@ -25,7 +29,7 @@ audit () {
         ok "Nothing listens on 25 port, probably unix socket configured"
     else
         info "Checking $RESULT"
-        if  $(grep -q "127.0.0.1" <<< $RESULT); then
+        if grep -q "127.0.0.1" <<<"$RESULT"; then
             ok "MTA is configured to localhost only"
         else
             crit "MTA listens worldwide"
@@ -34,7 +38,7 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     info "Checking netport ports opened"
     RESULT=$(netstat -an | grep LIST | grep ":25[[:space:]]") || :
     RESULT=${RESULT:-}
@@ -43,7 +47,7 @@ apply () {
         ok "Nothing listens on 25 port, probably unix socket configured"
     else
         info "Checking $RESULT"
-        if  $(grep -q "127.0.0.1" <<< $RESULT); then
+        if grep -q "127.0.0.1" <<<"$RESULT"; then
             ok "MTA is configured to localhost only"
         else
             warn "MTA listens worldwide, correct this considering your MTA"
@@ -59,17 +63,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.16_disable_rsync.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,8 +12,11 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure rsync service is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=rsync
 
 PACKAGE='rsync'
@@ -21,14 +25,14 @@ RSYNC_DEFAULT_FILE='/etc/default/rsync'
 RSYNC_DEFAULT_PATTERN_TO_SEARCH='RSYNC_ENABLE=true'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         ok "$PACKAGE is not installed"
     else
         ok "$PACKAGE is installed, checking configuration"
-        does_pattern_exist_in_file $RSYNC_DEFAULT_FILE "^$RSYNC_DEFAULT_PATTERN"
+        does_pattern_exist_in_file "$RSYNC_DEFAULT_FILE" "^$RSYNC_DEFAULT_PATTERN"
-        if [ $FNRET != 0 ]; then
+        if [ "$FNRET" != 0 ]; then
             crit "$RSYNC_DEFAULT_PATTERN not found in $RSYNC_DEFAULT_FILE"
         else
             ok "$RSYNC_DEFAULT_PATTERN found in $RSYNC_DEFAULT_FILE"
@@ -37,17 +41,17 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         ok "$PACKAGE is not installed"
     else
         ok "$PACKAGE is installed, checking configuration"
-        does_pattern_exist_in_file $RSYNC_DEFAULT_FILE "^$RSYNC_DEFAULT_PATTERN"
+        does_pattern_exist_in_file "$RSYNC_DEFAULT_FILE" "^$RSYNC_DEFAULT_PATTERN"
-        if [ $FNRET != 0 ]; then
+        if [ "$FNRET" != 0 ]; then
             warn "$RSYNC_DEFAULT_PATTERN not found in $RSYNC_DEFAULT_FILE, adding it"
-            backup_file $RSYNC_DEFAULT_FILE
+            backup_file "$RSYNC_DEFAULT_FILE"
-            replace_in_file $RSYNC_DEFAULT_FILE $RSYNC_DEFAULT_PATTERN_TO_SEARCH $RSYNC_DEFAULT_PATTERN
+            replace_in_file "$RSYNC_DEFAULT_FILE" "$RSYNC_DEFAULT_PATTERN_TO_SEARCH" "$RSYNC_DEFAULT_PATTERN"
         else
             ok "$RSYNC_DEFAULT_PATTERN found in $RSYNC_DEFAULT_FILE"
         fi
@@ -61,17 +65,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.17_disable_nis.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# 2.2.17 Ensure NIS Server is not enabled (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Disable NIS Server."
+
+PACKAGES='nis'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" = 0 ]; then
+            crit "$PACKAGE is installed!"
+        else
+            ok "$PACKAGE is absent"
+        fi
+    done
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    for PACKAGE in $PACKAGES; do
+        is_pkg_installed "$PACKAGE"
+        if [ "$FNRET" = 0 ]; then
+            crit "$PACKAGE is installed, purging it"
+            apt-get purge "$PACKAGE" -y
+            apt-get autoremove -y
+        else
+            ok "$PACKAGE is absent"
+        fi
+    done
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_ROOT_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
+    exit 128
+fi

bin/hardening/2.2.2_disable_xwindow_system.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,18 +12,21 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure the X Window system is not installed."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=x11
 
 # Based on aptitude search '~Pxserver'
 PACKAGES='xserver-xorg-core xserver-xorg-core-dbg xserver-common xserver-xephyr xserver-xfbdev tightvncserver vnc4server fglrx-driver xvfb xserver-xorg-video-nvidia-legacy-173xx xserver-xorg-video-nvidia-legacy-96xx xnest'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -31,13 +35,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -51,17 +55,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.3_disable_avahi_server.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,16 +12,18 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure Avahi server is not enabled."
 
 PACKAGES='avahi-daemon libavahi-common-data libavahi-common3 libavahi-core7'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -29,13 +32,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -49,17 +52,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.4_disable_print_server.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,17 +12,20 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure print server (Common Unix Print System) is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=cups
 
 PACKAGES='libcups2 libcupscgi1 libcupsimage2 libcupsmime1 libcupsppdc1 cups-common cups-client cups-ppdc libcupsfilters1 cups-filters cups'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -30,13 +34,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -50,17 +54,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.5_disable_dhcp.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,17 +12,20 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure DHCP server is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=dhcp
 
 PACKAGES='udhcpd isc-dhcp-server'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -30,13 +34,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -50,17 +54,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.6_disable_ldap.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,17 +12,20 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure LDAP is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=ldap
 
 PACKAGES='slapd'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -30,13 +34,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -50,17 +54,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.7_disable_nfs_rpc.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,17 +12,20 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure Network File System (nfs) and RPC are not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=nfs
 
 PACKAGES='rpcbind nfs-kernel-server'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -30,13 +34,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -50,17 +54,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.8_disable_dns_server.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,17 +12,20 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure Domain Name System (dns) server is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=dns
 
 PACKAGES='bind9 unbound'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -30,13 +34,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -50,17 +54,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.2.9_disable_ftp.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,18 +12,21 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure File Transfer Protocol (ftp) is not enabled."
+# shellcheck disable=2034
 HARDENING_EXCEPTION=ftp
 
 # Based on aptitude search '~Pftp-server'
 PACKAGES='ftpd ftpd-ssl heimdal-servers inetutils-ftpd krb5-ftpd muddleftpd proftpd-basic pure-ftpd pure-ftpd-ldap pure-ftpd-mysql pure-ftpd-postgresql twoftpd-run vsftpd wzdftpd'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed!"
         else
             ok "$PACKAGE is absent"
@@ -31,13 +35,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed, purging it"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -51,17 +55,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.3.1_disable_nis.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,15 +12,17 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Ensure that Network Information Service is not installed. Recommended alternative : LDAP."
 
 PACKAGE='nis'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$PACKAGE is installed!"
     else
         ok "$PACKAGE is absent"
@@ -28,12 +31,12 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    is_pkg_installed $PACKAGE
+    is_pkg_installed "$PACKAGE"
-    if [ $FNRET = 0 ]; then
+    if [ "$FNRET" = 0 ]; then
         crit "$PACKAGE is installed, purging it"
-        apt-get purge $PACKAGE -y
+        apt-get purge "$PACKAGE" -y
-        apt-get autoremove
+        apt-get autoremove -y
     else
         ok "$PACKAGE is absent"
     fi
@@ -46,17 +49,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.3.2_disable_rsh_client.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,17 +12,19 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Ensure rsh client is not installed, Recommended alternative : ssh."
 
 # Based on aptitude search '~Prsh-client', exluding ssh-client OFC
 PACKAGES='rsh-client rsh-redone-client heimdal-clients'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    for PACKAGE in $PACKAGES; do 
+    for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed"
         else
             ok "$PACKAGE is absent"
@@ -30,13 +33,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    for PACKAGE in $PACKAGES; do 
+    for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             warn "$PACKAGE is installed, purging"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -50,17 +53,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.3.3_disable_talk_client.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,16 +12,18 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Ensure talk client is not installed."
 
 PACKAGES='talk inetutils-talk'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed"
         else
             ok "$PACKAGE is absent"
@@ -29,13 +32,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             warn "$PACKAGE is installed, purging"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -49,17 +52,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.3.4_disable_telnet_client.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,16 +12,18 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Ensure telnet client is not installed."
 
 PACKAGES='telnet'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed"
         else
             ok "$PACKAGE is absent"
@@ -29,13 +32,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             warn "$PACKAGE is installed, purging"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -49,17 +52,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/2.3.5_disable_ldap_client.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
@@ -11,16 +12,18 @@
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Ensure ldap client is not installed."
 
 PACKAGES='ldap-utils'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             crit "$PACKAGE is installed"
         else
             ok "$PACKAGE is absent"
@@ -29,13 +32,13 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for PACKAGE in $PACKAGES; do
-        is_pkg_installed $PACKAGE
+        is_pkg_installed "$PACKAGE"
-        if [ $FNRET = 0 ]; then
+        if [ "$FNRET" = 0 ]; then
             warn "$PACKAGE is installed, purging"
-            apt-get purge $PACKAGE -y
+            apt-get purge "$PACKAGE" -y
-            apt-get autoremove
+            apt-get autoremove -y
         else
             ok "$PACKAGE is absent"
         fi
@@ -49,17 +52,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/3.1.1_disable_ip_forwarding.sh

@@ -1,73 +0,0 @@
-#!/bin/bash
-
-#
-# CIS Debian Hardening
-#
-
-#
-# 3.1.1 Ensure IP forwarding is disabled (Scored)
-#
-
-set -e # One error, it's over
-set -u # One variable unset, it's over
-
-HARDENING_LEVEL=3
-HARDENING_EXCEPTION=gw
-DESCRIPTION="Disable IP forwarding."
-
-SYSCTL_PARAMS='net.ipv4.ip_forward net.ipv6.conf.all.forwarding'
-SYSCTL_EXP_RESULT=0
-
-# This function will be called if the script status is on enabled / audit mode
-audit () {
-    for SYSCTL_PARAM in $SYSCTL_PARAMS; do
-    does_sysctl_param_exists "net.ipv6"
-    if [ $FNRET = 0 ] || [[ ! $SYSCTL_VALUES =~ .*ipv6.* ]]; then # IPv6 is enabled or SYSCTL_VALUES doesn't contain ipv6
-        has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
-            if [ $FNRET != 0 ]; then
-                crit "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT"
-            elif [ $FNRET = 255 ]; then
-                warn "$SYSCTL_PARAM does not exist -- Typo?"
-            else
-                ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
-            fi
-        fi
-    done
-}
-
-# This function will be called if the script status is on enabled mode
-apply () {
-    has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
-    if [ $FNRET != 0 ]; then
-        warn "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT -- Fixing"
-        set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT
-        sysctl -w net.ipv4.route.flush=1 > /dev/null
-    elif [ $FNRET = 255 ]; then
-        warn "$SYSCTL_PARAM does not exist -- Typo?"
-    else
-        ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
-    fi
-}
-
-# This function will check config parameters required
-check_config() {
-    :
-}
-
-# Source Root Dir Parameter
-if [ -r /etc/default/cis-hardening ]; then
-    . /etc/default/cis-hardening
-fi
-if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
-    exit 128
-fi
-
-# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
-else
-    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
-    exit 128
-fi

bin/hardening/3.1.1_disable_ipv6.sh

@@ -1,59 +1,50 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 3.7 Disable IPv6 (Not Scored)
+# 3.1.1 Disable IPv6 (Not Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Disable IPv6."
 
 SYSCTL_PARAMS='net.ipv6.conf.all.disable_ipv6=1 net.ipv6.conf.default.disable_ipv6=1 net.ipv6.conf.lo.disable_ipv6=1'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
-    does_sysctl_param_exists "net.ipv6"
+    is_ipv6_enabled
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         ok "ipv6 is disabled"
     else
-        for SYSCTL_VALUES in $SYSCTL_PARAMS; do
+        crit "ipv6 is enabled"
-            SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
-            SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
-            debug "$SYSCTL_PARAM should be set to $SYSCTL_EXP_RESULT"
-            has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
-            if [ $FNRET != 0 ]; then
-                crit "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT"
-            elif [ $FNRET = 255 ]; then
-                warn "$SYSCTL_PARAM does not exist -- Typo?"
-            else
-                ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
-            fi
-        done
     fi
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
-    does_sysctl_param_exists "net.ipv6"
+    is_ipv6_enabled
-    if [ $FNRET != 0 ]; then
+    if [ "$FNRET" != 0 ]; then
         ok "ipv6 is disabled"
     else
         for SYSCTL_VALUES in $SYSCTL_PARAMS; do
-            SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
+            SYSCTL_PARAM=$(echo "$SYSCTL_VALUES" | cut -d= -f 1)
-            SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
+            SYSCTL_EXP_RESULT=$(echo "$SYSCTL_VALUES" | cut -d= -f 2)
             debug "$SYSCTL_PARAM should be set to $SYSCTL_EXP_RESULT"
-            has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+            has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-            if [ $FNRET != 0 ]; then
+            if [ "$FNRET" != 0 ]; then
                 warn "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT value, fixing"
-                set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+                set_sysctl_param "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
                 warn "you may want to reboot or sysctl -p a file including $SYSCTL_PARAMS"
-            elif [ $FNRET = 255 ]; then
+            elif [ "$FNRET" = 255 ]; then
                 warn "$SYSCTL_PARAM does not exist -- Typo?"
             else
                 ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
@@ -69,17 +60,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/3.1.2_disable_wireless.sh

@@ -1,26 +1,29 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 3.6 Ensure wireless interfaces are disabled (Not Scored)
+# 3.1.2 Ensure wireless interfaces are disabled (Not Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=3
+# shellcheck disable=2034
 DESCRIPTION="Deactivate wireless interfaces."
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     info "Not implemented yet"
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     info "Not implemented yet"
 }
 
@@ -31,28 +34,31 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-	 echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment." 
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-	 echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
-	exit 128
+    exit 128
-fi 
+fi
 ## Source Root Dir Parameter
 #if [ ! -r /etc/default/cis-hardening ]; then
 #    echo "There is no /etc/default/cis-hardening file, cannot source CIS_ROOT_DIR variable, aborting"
 #    exit 128
 #else
+# shellcheck source=../../debian/default
 #    . /etc/default/cis-hardening
 #    if [ -z ${CIS_ROOT_DIR:-} ]; then
 #        echo "No CIS_ROOT_DIR variable, aborting"
 #        exit 128
 #    fi
-#fi 
+#fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128

bin/hardening/3.2.1_disable_send_packet_redirects.sh

@@ -1,17 +1,20 @@
 #!/bin/bash
 
+# run-shellcheck
 #
 # CIS Debian Hardening
 #
 
 #
-# 3.1.2 Ensure packet redirect sending is disabled (Scored)
+# 3.2.1 Ensure packet redirect sending is disabled (Scored)
 #
 
 set -e # One error, it's over
 set -u # One variable unset, it's over
 
+# shellcheck disable=2034
 HARDENING_LEVEL=2
+# shellcheck disable=2034
 DESCRIPTION="Disable send packet redirects to prevent malicious ICMP corruption."
 
 #net.ipv4.conf.all.send_redirects = 0
@@ -19,15 +22,15 @@ DESCRIPTION="Disable send packet redirects to prevent malicious ICMP corruption.
 SYSCTL_PARAMS='net.ipv4.conf.all.send_redirects=0 net.ipv4.conf.default.send_redirects=0'
 
 # This function will be called if the script status is on enabled / audit mode
-audit () {
+audit() {
     for SYSCTL_VALUES in $SYSCTL_PARAMS; do
-        SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
+        SYSCTL_PARAM=$(echo "$SYSCTL_VALUES" | cut -d= -f 1)
-        SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
+        SYSCTL_EXP_RESULT=$(echo "$SYSCTL_VALUES" | cut -d= -f 2)
         debug "$SYSCTL_PARAM should be set to $SYSCTL_EXP_RESULT"
-        has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+        has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-        if [ $FNRET != 0 ]; then
+        if [ "$FNRET" != 0 ]; then
             crit "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT"
-        elif [ $FNRET = 255 ]; then
+        elif [ "$FNRET" = 255 ]; then
             warn "$SYSCTL_PARAM does not exist -- Typo?"
         else
             ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
@@ -36,17 +39,17 @@ audit () {
 }
 
 # This function will be called if the script status is on enabled mode
-apply () {
+apply() {
     for SYSCTL_VALUES in $SYSCTL_PARAMS; do
-        SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
+        SYSCTL_PARAM=$(echo "$SYSCTL_VALUES" | cut -d= -f 1)
-        SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
+        SYSCTL_EXP_RESULT=$(echo "$SYSCTL_VALUES" | cut -d= -f 2)
         debug "$SYSCTL_PARAM should be set to $SYSCTL_EXP_RESULT"
-        has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+        has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-        if [ $FNRET != 0 ]; then
+        if [ "$FNRET" != 0 ]; then
             warn "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT -- Fixing"
-            set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+            set_sysctl_param "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
-            sysctl -w net.ipv4.route.flush=1 > /dev/null
+            sysctl -w net.ipv4.route.flush=1 >/dev/null
-        elif [ $FNRET = 255 ]; then
+        elif [ "$FNRET" = 255 ]; then
             warn "$SYSCTL_PARAM does not exist -- Typo?"
         else
             ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
@@ -61,17 +64,19 @@ check_config() {
 
 # Source Root Dir Parameter
 if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
     . /etc/default/cis-hardening
 fi
 if [ -z "$CIS_ROOT_DIR" ]; then
-     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
-     echo "Cannot source CIS_ROOT_DIR variable, aborting."
+    echo "Cannot source CIS_ROOT_DIR variable, aborting."
     exit 128
 fi
 
 # Main function, will call the proper functions given the configuration (audit, enabled, disabled)
-if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
+if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
-    . $CIS_ROOT_DIR/lib/main.sh
+    # shellcheck source=../../lib/main.sh
+    . "$CIS_ROOT_DIR"/lib/main.sh
 else
     echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
     exit 128