mirror of
https://github.com/ovh/debian-cis.git
synced 2024-11-22 13:37:02 +01:00
107 lines
3.2 KiB
Bash
Executable File
107 lines
3.2 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
# run-shellcheck
|
|
#
|
|
# CIS Debian Hardening
|
|
#
|
|
|
|
#
|
|
# 4.1.16 Ensure kernel module loading and unloading is collected (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="Collect kernel module loading and unloading."
|
|
|
|
AUDIT_PARAMS='-w /sbin/insmod -p x -k modules
|
|
-w /sbin/rmmod -p x -k modules
|
|
-w /sbin/modprobe -p x -k modules
|
|
-a always,exit -F arch=b64 -S init_module -S delete_module -k modules'
|
|
FILES_TO_SEARCH='/etc/audit/audit.rules /etc/audit/rules.d/audit.rules'
|
|
FILE='/etc/audit/rules.d/audit.rules'
|
|
|
|
# This function will be called if the script status is on enabled / audit mode
|
|
audit() {
|
|
# define custom IFS and save default one
|
|
d_IFS=$IFS
|
|
c_IFS=$'\n'
|
|
IFS=$c_IFS
|
|
for AUDIT_VALUE in $AUDIT_PARAMS; do
|
|
debug "$AUDIT_VALUE should be in file $FILES_TO_SEARCH"
|
|
IFS=$d_IFS
|
|
SEARCH_RES=0
|
|
for FILE_SEARCHED in $FILES_TO_SEARCH; do
|
|
does_pattern_exist_in_file "$FILE_SEARCHED" "$AUDIT_VALUE"
|
|
IFS=$c_IFS
|
|
if [ "$FNRET" != 0 ]; then
|
|
debug "$AUDIT_VALUE is not in file $FILE_SEARCHED"
|
|
else
|
|
ok "$AUDIT_VALUE is present in $FILE_SEARCHED"
|
|
SEARCH_RES=1
|
|
fi
|
|
done
|
|
if [ "$SEARCH_RES" = 0 ]; then
|
|
crit "$AUDIT_VALUE is not present in $FILES_TO_SEARCH"
|
|
fi
|
|
done
|
|
IFS=$d_IFS
|
|
}
|
|
|
|
# This function will be called if the script status is on enabled mode
|
|
apply() {
|
|
# define custom IFS and save default one
|
|
d_IFS=$IFS
|
|
c_IFS=$'\n'
|
|
IFS=$c_IFS
|
|
for AUDIT_VALUE in $AUDIT_PARAMS; do
|
|
debug "$AUDIT_VALUE should be in file $FILES_TO_SEARCH"
|
|
IFS=$d_IFS
|
|
SEARCH_RES=0
|
|
for FILE_SEARCHED in $FILES_TO_SEARCH; do
|
|
does_pattern_exist_in_file "$FILE_SEARCHED" "$AUDIT_VALUE"
|
|
IFS=$c_IFS
|
|
if [ "$FNRET" != 0 ]; then
|
|
debug "$AUDIT_VALUE is not in file $FILE_SEARCHED"
|
|
else
|
|
ok "$AUDIT_VALUE is present in $FILE_SEARCHED"
|
|
SEARCH_RES=1
|
|
fi
|
|
done
|
|
if [ "$SEARCH_RES" = 0 ]; then
|
|
warn "$AUDIT_VALUE is not present in $FILES_TO_SEARCH, adding it to $FILE"
|
|
add_end_of_file "$FILE" "$AUDIT_VALUE"
|
|
eval "$(pkill -HUP -P 1 auditd)"
|
|
fi
|
|
done
|
|
IFS=$d_IFS
|
|
}
|
|
|
|
# This function will check config parameters required
|
|
check_config() {
|
|
:
|
|
}
|
|
|
|
# Source Root Dir Parameter
|
|
if [ -r /etc/default/cis-hardening ]; then
|
|
# shellcheck source=../../debian/default
|
|
. /etc/default/cis-hardening
|
|
fi
|
|
if [ -z "$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
|