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170 lines
6.0 KiB
Groff
170 lines
6.0 KiB
Groff
.\" Automatically generated by Pandoc 2.6
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.\"
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.TH "CIS-HARDENING" "8" "2016" "" ""
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.hy
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.SH NAME
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.PP
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cis-hardening - CIS Debian 9/10 Hardening
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.SH SYNOPSIS
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.PP
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\f[B]hardening.sh\f[R] RUN_MODE OPTIONS
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.SH DESCRIPTION
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.PP
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Modular Debian 9/10 security hardening scripts based on the CIS
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(https://www.cisecurity.org) recommendations.
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.PP
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We use it at OVHcloud (https://www.ovhcloud.com) to harden our PCI-DSS
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infrastructure.
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.SH SCRIPTS CONFIGURATION
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.PP
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Hardening scripts are in \f[C]bin/hardening\f[R].
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Each script has a corresponding configuration file in
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\f[C]etc/conf.d/[script_name].cfg\f[R].
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.PP
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Each hardening script can be individually enabled from its configuration
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file.
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For example, this is the default configuration file for
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\f[C]disable_system_accounts\f[R]:
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.IP
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.nf
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\f[C]
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# Configuration for script of same name
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status=disabled
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# Put here your exceptions concerning admin accounts shells separated by spaces
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EXCEPTIONS=\[dq]\[dq]
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\f[R]
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.fi
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.PP
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\f[B]status\f[R] parameter may take 3 values:
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.IP \[bu] 2
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\f[C]disabled\f[R] (do nothing): The script will not run.
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.IP \[bu] 2
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\f[C]audit\f[R] (RO): The script will check if any change should be
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applied.
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.IP \[bu] 2
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\f[C]enabled\f[R] (RW): The script will check if any change should be
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done and automatically apply what it can.
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.PP
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Global configuration is in \f[C]etc/hardening.cfg\f[R].
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This file controls the log level as well as the backup directory.
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Whenever a script is instructed to edit a file, it will create a
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timestamped backup in this directory.
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.SH RUN MODE
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.TP
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.B \f[C]-h\f[R], \f[C]--help\f[R]
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Display a friendly help message.
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.TP
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.B \f[C]--apply\f[R]
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Apply hardening for enabled scripts.
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Beware that NO confirmation is asked whatsoever, which is why you\[cq]re
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warmly advised to use \f[C]--audit\f[R] before, which can be regarded as
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a dry-run mode.
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.TP
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.B \f[C]--audit\f[R]
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Audit configuration for enabled scripts.
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No modification will be made on the system, we\[cq]ll only report on
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your system compliance for each script.
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.TP
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.B \f[C]--audit-all\f[R]
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Same as \f[C]--audit\f[R], but for \f[I]all\f[R] scripts, even disabled
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ones.
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This is a good way to peek at your compliance level if all scripts were
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enabled, and might be a good starting point.
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.TP
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.B \f[C]--audit-all-enable-passed\f[R]
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Same as \f[C]--audit-all\f[R], but in addition, will \f[I]modify\f[R]
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the individual scripts configurations to enable those which passed for
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your system.
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This is an easy way to enable scripts for which you\[cq]re already
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compliant.
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However, please always review each activated script afterwards, this
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option should only be regarded as a way to kickstart a configuration
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from scratch.
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Don\[cq]t run this if you have already customized the scripts
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enable/disable configurations, obviously.
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.TP
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.B \f[C]--create-config-files-only\f[R]
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Create the config files in etc/conf.d Must be run as root, before
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running the audit with user secaudit
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.TP
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.B \f[C]-set-hardening-level=level\f[R]
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Modifies the configuration to enable/disable tests given an hardening
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level, between 1 to 5.
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Don\[cq]t run this if you have already customized the scripts
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enable/disable configurations.
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1: very basic policy, failure to pass tests at this level indicates
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severe misconfiguration of the machine that can have a huge security
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impact 2: basic policy, some good practice rules that, once applied,
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shouldn\[cq]t break anything on most systems 3: best practices policy,
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passing all tests might need some configuration modifications (such as
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specific partitioning, etc.) 4: high security policy, passing all tests
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might be time-consuming and require high adaptation of your workflow 5:
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placebo, policy rules that might be very difficult to apply and
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maintain, with questionable security benefits
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.TP
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.B \f[C]--allow-service=service\f[R]
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Use with \f[C]--set-hardening-level\f[R].
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Modifies the policy to allow a certain kind of services on the machine,
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such as http, mail, etc.
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Can be specified multiple times to allow multiple services.
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Use \[en]allow-service-list to get a list of supported services.
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.SH OPTIONS
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.TP
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.B \f[C]--allow-service-list\f[R]
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Get a list of supported service.
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.TP
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.B \f[C]--only test-number\f[R]
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Modifies the RUN_MODE to only work on the test_number script.
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Can be specified multiple times to work only on several scripts.
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The test number is the numbered prefix of the script, i.e.\ the test
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number of 1.2_script_name.sh is 1.2.
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.TP
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.B \f[C]--sudo\f[R]
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This option lets you audit your system as a normal user, but allows sudo
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escalation to gain read-only access to root files.
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Note that you need to provide a sudoers file with NOPASSWD option in
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/etc/sudoers.d/ because the -n option instructs sudo not to prompt for a
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password.
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Finally note that \f[C]--sudo\f[R] mode only works for audit mode.
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.TP
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.B \f[C]--batch\f[R]
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While performing system audit, this option sets LOGLEVEL to `ok' and
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captures all output to print only one line once the check is done,
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formatted like : OK|KO OK|KO|WARN{subcheck results} [OK|KO|WARN{\&...}]
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.SH AUTHORS
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.IP \[bu] 2
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Thibault Dewailly, OVHcloud <thibault.dewailly@ovhcloud.com>
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.IP \[bu] 2
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St\['e]phane Lesimple, OVHcloud <stephane.lesimple@ovhcloud.com>
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.IP \[bu] 2
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Thibault Ayanides, OVHcloud <thibault.ayanides@ovhcloud.com>
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.IP \[bu] 2
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Kevin Tanguy, OVHcloud <kevin.tanguy@ovhcloud.com>
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.SH COPYRIGHT
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.PP
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Copyright 2020 OVHcloud
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.PP
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Licensed under the Apache License, Version 2.0 (the \[lq]License\[rq]);
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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.IP
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.nf
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\f[C]
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http://www.apache.org/licenses/LICENSE-2.0
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\f[R]
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.fi
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.PP
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an \[lq]AS IS\[rq]
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BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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# SEE ALSO
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.IP \[bu] 2
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\f[B]Center for Internet Security\f[R]: https://www.cisecurity.org/
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.IP \[bu] 2
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\f[B]CIS recommendations\f[R]: https://learn.cisecurity.org/benchmarks
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.IP \[bu] 2
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\f[B]Project repository\f[R]: https://github.com/ovh/debian-cis
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