Files
debian-cis/tests/hardening/sshd_limit_access.sh
damcav35 be33848d81 Damcava35/set version (#257)
* feat: add "--set-version" option

This feature will allow to chose a specific cis version to run, like debian 11 or debian 12

* chore: configure current repository as a version

And use it as default version.

To this end, the scripts in bin/hardening have been made generic by removing the associated recommendation number.
Only impact is if you are used to execute scripts directly from bin/hardening.
In this case, please use the "bin/hardening.sh" wrapper as intended.

I had to rename 2.3.1_disable_nis.sh to uninstall_nis.sh, as it was conflicting with 2.3.1_disable_nis.sh

Also, there was a doublon between 1.1.1.8_disable_cramfs.sh and 99.1.1.1_disable_cramfs.sh ; the former was kept

* chore: remove CIS recommendation numbers from bin/hardening scripts

* fix: some tests are failing

find_ungrouped_files.sh and find_unowned_files.sh tests can not be executed multiple times:
- test repository is not cleaned
- configuration is updated multiple times

Those tests are also failing, because:
- the sed to change the status in the configuration was also changing the test folder path.
- missing /proc in EXCLUDED paths
- the EXCLUDED configuration doesn't have the correct format for egrep

---------

Co-authored-by: Damien Cavagnini <damien.cavagnini@corp.ovh.com>
2025-07-01 08:41:55 +02:00

131 lines
7.7 KiB
Bash

# shellcheck shell=bash
# run-shellcheck
test_audit() {
describe Running on blank host
register_test retvalshouldbe 1
register_test contain "openssh-server is installed"
# shellcheck disable=2154
run blank "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
describe Correcting situation
# `apply` performs a service reload after each change in the config file
# the service needs to be started for the reload to succeed
service ssh start
# if the audit script provides "apply" option, enable and run it
sed -i 's/audit/enabled/' "${CIS_CONF_DIR}/conf.d/${script}.cfg"
"${CIS_CHECKS_DIR}/${script}.sh" || true
describe Checking resolved state
register_test retvalshouldbe 0
register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run resolved "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
describe Check and report mismatch for allowed user
useradd -s /bin/bash johnallow
sed -i "s/ALLOWED_USERS=''/ALLOWED_USERS='johnallow'/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
register_test retvalshouldbe 1
register_test contain "^AllowUsers[[:space:]]*johnallow is not present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run allowed_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
describe Correctly apply allowed user
# the previous test checked that ALLOWED_USERS is set but not correctly applied in sshd_config so we apply it now
"${CIS_CHECKS_DIR}/${script}.sh" || true
# and check again that the fix was correctly applied
register_test retvalshouldbe 0
register_test contain "^AllowUsers[[:space:]]*johnallow is present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run fix_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --apply-all
describe Check and report mismatch for multiple allowed users
useradd -s /bin/bash janeallow
sed -i "s/johnallow/johnallow janeallow/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
register_test retvalshouldbe 1
register_test contain "^AllowUsers[[:space:]]*johnallow janeallow is not present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run multi_allowed_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
describe Correctly apply multiple allowed users
# the previous test checked that ALLOWED_USERS is set but not correctly applied in sshd_config so we apply it now
"${CIS_CHECKS_DIR}/${script}.sh" || true
# and check again that the fix was correctly applied
tail -n 5 /etc/ssh/sshd_config
register_test retvalshouldbe 0
register_test contain "^AllowUsers[[:space:]]*johnallow janeallow is present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run fix_multi_allowed_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
# reset allowed users to default before continuing
sed -i "s/ALLOWED_USERS='johnallow janeallow'/ALLOWED_USERS=''/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
describe Check and report mismatch for denied user
useradd -s /bin/bash peterdeny
sed -i "s/DENIED_USERS=''/DENIED_USERS='peterdeny'/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
register_test retvalshouldbe 1
register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*peterdeny is not present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run denied_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
describe Correctly apply denied user
# the previous test checked that DENIED_USERS is set but not correctly applied in sshd_config so we apply it now
"${CIS_CHECKS_DIR}/${script}.sh" || true
# and check again that the fix was correctly applied
register_test retvalshouldbe 0
register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*peterdeny is present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run fix_denied_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --apply-all
describe Check and report mismatch for multiple denied users
useradd -s /bin/bash marrydeny
sed -i "s/peterdeny/peterdeny marrydeny/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
register_test retvalshouldbe 1
register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*peterdeny marrydeny is not present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run multi_denied_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
describe Correctly apply multiple denied users
# the previous test checked that DENIED_USERS is set but not correctly applied in sshd_config so we apply it now
"${CIS_CHECKS_DIR}/${script}.sh" || true
# and check again that the fix was correctly applied
register_test retvalshouldbe 0
register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*peterdeny marrydeny is present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run fix_multi_denied_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
# reset to prevent other test from possibly failing in the future
sed -i "s/DENIED_USERS='peterdeny marrydeny'/DENIED_USERS=''/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
"${CIS_CHECKS_DIR}/${script}.sh" || true
describe Checking resolved state
register_test retvalshouldbe 0
register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
run cleanup_resolved "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
# Cleanup
userdel johnallow
userdel janeallow
userdel peterdeny
userdel marrydeny
}