debian-cis/bin/hardening/4.1.1.3_keep_all_audit_logs.sh
2020-12-10 09:50:33 +01:00

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#!/bin/bash
# run-shellcheck
#
# CIS Debian Hardening
#
#
# 4.1.1.3 Ensure audit logs are not automatically deleted (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="Keep all auditing information."
FILE='/etc/audit/auditd.conf'
OPTIONS='max_log_file_action=keep_logs'
# This function will be called if the script status is on enabled / audit mode
audit() {
does_file_exist "$FILE"
if [ "$FNRET" != 0 ]; then
crit "$FILE does not exist"
else
ok "$FILE exists, checking configuration"
for AUDIT_OPTION in $OPTIONS; do
AUDIT_PARAM=$(echo "$AUDIT_OPTION" | cut -d= -f 1)
AUDIT_VALUE=$(echo "$AUDIT_OPTION" | cut -d= -f 2)
PATTERN="^${AUDIT_PARAM}[[:space:]]*=[[:space:]]*$AUDIT_VALUE"
debug "$AUDIT_PARAM should be set to $AUDIT_VALUE"
does_pattern_exist_in_file "$FILE" "$PATTERN"
if [ "$FNRET" != 0 ]; then
crit "$PATTERN is not present in $FILE"
else
ok "$PATTERN is present in $FILE"
fi
done
fi
}
# This function will be called if the script status is on enabled mode
apply() {
does_file_exist "$FILE"
if [ "$FNRET" != 0 ]; then
warn "$FILE does not exist, creating it"
touch $FILE
else
ok "$FILE exists"
fi
for AUDIT_OPTION in $OPTIONS; do
AUDIT_PARAM=$(echo "$AUDIT_OPTION" | cut -d= -f 1)
AUDIT_VALUE=$(echo "$AUDIT_OPTION" | cut -d= -f 2)
debug "$AUDIT_PARAM should be set to $AUDIT_VALUE"
PATTERN="^${AUDIT_PARAM}[[:space:]]*=[[:space:]]*$AUDIT_VALUE"
does_pattern_exist_in_file $FILE "$PATTERN"
if [ "$FNRET" != 0 ]; then
warn "$PATTERN is not present in $FILE, adding it"
does_pattern_exist_in_file "$FILE" "^$AUDIT_PARAM"
if [ "$FNRET" != 0 ]; then
info "Parameter $AUDIT_PARAM seems absent from $FILE, adding at the end"
add_end_of_file "$FILE" "$AUDIT_PARAM = $AUDIT_VALUE"
else
info "Parameter $AUDIT_PARAM is present but with the wrong value -- Fixing"
replace_in_file "$FILE" "^${AUDIT_PARAM}[[:space:]]*=.*" "$AUDIT_PARAM = $AUDIT_VALUE"
fi
else
ok "$PATTERN is present in $FILE"
fi
done
}
# This function will check config parameters required
check_config() {
:
}
# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
# shellcheck source=../../debian/default
. /etc/default/cis-hardening
fi
if [ -z "$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