Files
debian-cis/bin/hardening/shadow_group_empty.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

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#!/bin/bash
# run-shellcheck
#
# CIS Debian Hardening
#
#
# Ensure shadow group is empty (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="There is no user in shadow group (that can read /etc/shadow file)."
FILEGROUP='/etc/group'
PATTERN='^shadow:x:[[:digit:]]+:'
# This function will be called if the script status is on enabled / audit mode
audit() {
does_pattern_exist_in_file "$FILEGROUP" "$PATTERN"
if [ "$FNRET" = 0 ]; then
info "shadow group exists"
RESULT=$(grep -E "$PATTERN" $FILEGROUP | cut -d: -f4)
GROUPID=$(getent group shadow | cut -d: -f3)
debug "$RESULT $GROUPID"
if [ -n "$RESULT" ]; then
crit "Some users belong to shadow group: $RESULT"
else
ok "No user belongs to shadow group"
fi
info "Checking if a user has $GROUPID as primary group"
RESULT=$(awk -F: '($4 == shadowid) { print $1 }' shadowid="$GROUPID" /etc/passwd)
if [ -n "$RESULT" ]; then
crit "Some users have shadow id as their primary group: $RESULT"
else
ok "No user has shadow id as their primary group"
fi
else
crit "shadow group doesn't exist"
fi
}
# This function will be called if the script status is on enabled mode
apply() {
info "Editing automatically users/groups may seriously harm your system, report only here"
}
# This function will check config parameters required
check_config() {
:
}
# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
# shellcheck source=../../debian/default
. /etc/default/cis-hardening
fi
if [ -z "$CIS_LIB_DIR" ]; then
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
echo "Cannot source CIS_LIB_DIR variable, aborting."
exit 128
fi
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
# shellcheck source=../../lib/main.sh
. "${CIS_LIB_DIR}"/main.sh
else
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
exit 128
fi