debian-cis/bin/hardening/13.20_shadow_group_empty.sh
2017-03-10 17:46:39 +01:00

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#!/bin/bash
#
# CIS Debian 7/8 Hardening
#
#
# 13.20 Ensure shadow group is empty (Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
ERRORS=0
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 $GROUPID"
if [ ! -z "$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 [ ! -z "$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
echo "There is no /etc/default/cis-hardening FILE, cannot source CIS_ROOT_DIR variable, aborting"
exit 128
else
. /etc/default/cis-hardening
if [ -z ${CIS_ROOT_DIR:-} ]; then
echo "No CIS_ROOT_DIR variable, aborting"
exit 128
fi
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