2016-04-14 10:40:31 +02:00
|
|
|
#!/bin/bash
|
|
|
|
|
2020-11-23 17:10:37 +01:00
|
|
|
# run-shellcheck
|
2016-04-14 10:40:31 +02:00
|
|
|
#
|
2019-02-06 15:19:14 +01:00
|
|
|
# CIS Debian Hardening
|
2016-04-14 10:40:31 +02:00
|
|
|
#
|
|
|
|
|
|
|
|
#
|
2019-09-09 16:45:54 +02:00
|
|
|
# 4.1.1.2 Ensure system is disabled when audit logs are full (Scored)
|
2016-04-14 10:40:31 +02:00
|
|
|
#
|
|
|
|
|
|
|
|
set -e # One error, it's over
|
|
|
|
set -u # One variable unset, it's over
|
|
|
|
|
2020-11-27 09:18:00 +01:00
|
|
|
# shellcheck disable=2034
|
2017-05-18 18:40:09 +02:00
|
|
|
HARDENING_LEVEL=4
|
2020-11-27 09:18:00 +01:00
|
|
|
# shellcheck disable=2034
|
2017-10-31 17:44:15 +01:00
|
|
|
DESCRIPTION="Disable system on audit log full."
|
2017-05-18 18:40:09 +02:00
|
|
|
|
2016-04-14 10:40:31 +02:00
|
|
|
FILE='/etc/audit/auditd.conf'
|
2020-11-09 11:48:48 +01:00
|
|
|
OPTIONS=''
|
2016-04-14 10:40:31 +02:00
|
|
|
|
|
|
|
# This function will be called if the script status is on enabled / audit mode
|
2020-12-04 14:08:01 +01:00
|
|
|
audit() {
|
2016-04-14 10:40:31 +02:00
|
|
|
does_file_exist $FILE
|
2020-11-27 09:29:11 +01:00
|
|
|
if [ "$FNRET" != 0 ]; then
|
2016-04-14 10:40:31 +02:00
|
|
|
crit "$FILE does not exist"
|
|
|
|
else
|
2016-04-25 15:15:49 +02:00
|
|
|
ok "$FILE exists, checking configuration"
|
2016-04-14 10:40:31 +02:00
|
|
|
for AUDIT_OPTION in $OPTIONS; do
|
2020-12-04 14:08:01 +01:00
|
|
|
AUDIT_PARAM=$(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
|
2016-04-14 10:40:31 +02:00
|
|
|
done
|
|
|
|
fi
|
|
|
|
}
|
|
|
|
|
|
|
|
# This function will be called if the script status is on enabled mode
|
2020-12-04 14:08:01 +01:00
|
|
|
apply() {
|
2016-04-14 10:40:31 +02:00
|
|
|
does_file_exist $FILE
|
2020-11-27 09:29:11 +01:00
|
|
|
if [ "$FNRET" != 0 ]; then
|
2016-04-14 10:40:31 +02:00
|
|
|
warn "$FILE does not exist, creating it"
|
|
|
|
touch $FILE
|
|
|
|
else
|
2016-04-25 15:15:49 +02:00
|
|
|
ok "$FILE exists"
|
2016-04-14 10:40:31 +02:00
|
|
|
fi
|
|
|
|
for AUDIT_OPTION in $OPTIONS; do
|
|
|
|
AUDIT_PARAM=$(echo $AUDIT_OPTION | cut -d= -f 1)
|
|
|
|
AUDIT_VALUE=$(echo $AUDIT_OPTION | cut -d= -f 2)
|
2016-04-21 18:32:36 +02:00
|
|
|
debug "$AUDIT_PARAM should be set to $AUDIT_VALUE"
|
2016-04-14 10:40:31 +02:00
|
|
|
PATTERN="^$AUDIT_PARAM[[:space:]]*=[[:space:]]*$AUDIT_VALUE"
|
2016-04-25 15:15:49 +02:00
|
|
|
does_pattern_exist_in_file $FILE "$PATTERN"
|
2020-11-27 09:29:11 +01:00
|
|
|
if [ "$FNRET" != 0 ]; then
|
2016-04-25 15:15:49 +02:00
|
|
|
warn "$PATTERN is not present in $FILE, adding it"
|
|
|
|
does_pattern_exist_in_file $FILE "^$AUDIT_PARAM"
|
2020-11-27 09:29:11 +01:00
|
|
|
if [ "$FNRET" != 0 ]; then
|
2016-04-14 13:11:56 +02:00
|
|
|
info "Parameter $AUDIT_PARAM seems absent from $FILE, adding at the end"
|
2016-04-14 10:40:31 +02:00
|
|
|
add_end_of_file $FILE "$AUDIT_PARAM = $AUDIT_VALUE"
|
|
|
|
else
|
2016-04-21 18:32:36 +02:00
|
|
|
info "Parameter $AUDIT_PARAM is present but with the wrong value -- Fixing"
|
2016-04-14 10:40:31 +02:00
|
|
|
replace_in_file $FILE "^$AUDIT_PARAM[[:space:]]*=.*" "$AUDIT_PARAM = $AUDIT_VALUE"
|
|
|
|
fi
|
|
|
|
else
|
2016-04-25 15:15:49 +02:00
|
|
|
ok "$PATTERN is present in $FILE"
|
2016-04-14 10:40:31 +02:00
|
|
|
fi
|
|
|
|
done
|
|
|
|
}
|
|
|
|
|
|
|
|
# This function will check config parameters required
|
|
|
|
check_config() {
|
|
|
|
:
|
|
|
|
}
|
|
|
|
|
2020-11-09 11:48:48 +01:00
|
|
|
create_config() {
|
2020-12-04 14:08:01 +01:00
|
|
|
cat <<EOF
|
2020-11-09 11:48:48 +01:00
|
|
|
# shellcheck disable=2034
|
|
|
|
status=audit
|
|
|
|
# Put here the conf for auditd
|
|
|
|
OPTIONS='space_left_action=email action_mail_acct=root admin_space_left_action=halt'
|
|
|
|
EOF
|
|
|
|
}
|
|
|
|
|
2016-04-14 10:40:31 +02:00
|
|
|
# Source Root Dir Parameter
|
2017-10-25 14:50:39 +02:00
|
|
|
if [ -r /etc/default/cis-hardening ]; then
|
2020-12-04 14:08:01 +01:00
|
|
|
# shellcheck source=../../debian/default
|
2016-04-18 17:39:14 +02:00
|
|
|
. /etc/default/cis-hardening
|
2017-10-25 14:50:39 +02:00
|
|
|
fi
|
|
|
|
if [ -z "$CIS_ROOT_DIR" ]; then
|
2020-12-04 14:08:01 +01:00
|
|
|
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
|
|
|
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
2017-10-25 14:50:39 +02:00
|
|
|
exit 128
|
|
|
|
fi
|
2016-04-14 10:40:31 +02:00
|
|
|
|
|
|
|
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
2020-11-27 09:29:11 +01:00
|
|
|
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
2020-12-04 14:08:01 +01:00
|
|
|
# shellcheck source=../../lib/main.sh
|
2020-11-27 09:29:11 +01:00
|
|
|
. "$CIS_ROOT_DIR"/lib/main.sh
|
2016-04-21 23:19:50 +02:00
|
|
|
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
|