debian-cis/bin/hardening/3.3.3_hosts_deny.sh
Thibault Ayanides c17d04ecc2 IMP(shellcheck): comply with shellcheck rules
I added shellcheck prefixes to fix:
 * SC1091 (following sourced files)
 * SC2034 (unused variables)
2020-11-27 09:18:00 +01:00

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#!/bin/bash
# run-shellcheck
#
# CIS Debian Hardening
#
#
# 3.3.3 Ensure /etc/hosts.deny is configured (Not Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
# shellcheck disable=2034
HARDENING_LEVEL=3
# shellcheck disable=2034
DESCRIPTION="Create /etc/hosts.deny ."
FILE='/etc/hosts.deny'
PATTERN='ALL: ALL'
# 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"
does_pattern_exist_in_file $FILE "$PATTERN"
if [ $FNRET != 0 ]; then
crit "$PATTERN is not present in $FILE, we have to deny everything"
else
ok "$PATTERN is present in $FILE"
fi
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
does_pattern_exist_in_file $FILE "$PATTERN"
if [ $FNRET != 0 ]; then
crit "$PATTERN is not present in $FILE, we have to deny everything"
add_end_of_file $FILE "$PATTERN"
warn "YOU MAY HAVE CUT YOUR ACCESS, CHECK BEFORE DISCONNECTING"
else
ok "$PATTERN is present in $FILE"
fi
}
# This function will check config parameters required
check_config() {
:
}
# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
# shellcheck source=../../debian/default
. /etc/default/cis-hardening
fi
if [ -z "$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