Files
debian-cis/bin/hardening/net_fw_default_policy_drop.sh
damcav35 be33848d81 Damcava35/set version (#257)
* feat: add "--set-version" option

This feature will allow to chose a specific cis version to run, like debian 11 or debian 12

* chore: configure current repository as a version

And use it as default version.

To this end, the scripts in bin/hardening have been made generic by removing the associated recommendation number.
Only impact is if you are used to execute scripts directly from bin/hardening.
In this case, please use the "bin/hardening.sh" wrapper as intended.

I had to rename 2.3.1_disable_nis.sh to uninstall_nis.sh, as it was conflicting with 2.3.1_disable_nis.sh

Also, there was a doublon between 1.1.1.8_disable_cramfs.sh and 99.1.1.1_disable_cramfs.sh ; the former was kept

* chore: remove CIS recommendation numbers from bin/hardening scripts

* fix: some tests are failing

find_ungrouped_files.sh and find_unowned_files.sh tests can not be executed multiple times:
- test repository is not cleaned
- configuration is updated multiple times

Those tests are also failing, because:
- the sed to change the status in the configuration was also changing the test folder path.
- missing /proc in EXCLUDED paths
- the EXCLUDED configuration doesn't have the correct format for egrep

---------

Co-authored-by: Damien Cavagnini <damien.cavagnini@corp.ovh.com>
2025-07-01 08:41:55 +02:00

83 lines
2.3 KiB
Bash
Executable File

#!/bin/bash
# run-shellcheck
#
# OVH Security audit
#
#
# Ensure default deny firewall policy (Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
# shellcheck disable=2034
HARDENING_LEVEL=2
# shellcheck disable=2034
DESCRIPTION="Check iptables firewall default policy for DROP on INPUT and FORWARD."
PACKAGE="iptables"
FW_CHAINS="INPUT FORWARD"
FW_POLICY="DROP"
FW_CMD="iptables"
FW_TIMEOUT="10"
# This function will be called if the script status is on enabled / audit mode
audit() {
is_pkg_installed "$PACKAGE"
if [ "$FNRET" != 0 ]; then
crit "$PACKAGE is not installed!"
else
ipt=$($SUDO_CMD "$FW_CMD" -w "$FW_TIMEOUT" -nL 2>/dev/null || true)
if [[ -z "$ipt" ]]; then
crit "Empty return from $FW_CMD command. Aborting..."
return
fi
for chain in $FW_CHAINS; do
regex="Chain $chain \(policy ([A-Z]+)\)"
# previous line will capture actual policy
if [[ "$ipt" =~ $regex ]]; then
actual_policy=${BASH_REMATCH[1]}
if [[ "$actual_policy" = "$FW_POLICY" ]]; then
ok "Policy correctly set to $FW_POLICY for chain $chain"
else
crit "Policy set to $actual_policy for chain $chain, should be ${FW_POLICY}."
fi
else
crit "Unable to find chain $chain"
fi
done
fi
}
# This function will be called if the script status is on enabled mode
apply() {
:
}
# This function will check config parameters required
check_config() {
:
}
# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
# shellcheck source=../../debian/default
. /etc/default/cis-hardening
fi
if [ -z "$CIS_LIB_DIR" ]; then
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
echo "Cannot source CIS_LIB_DIR variable, aborting."
exit 128
fi
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
# shellcheck source=../../lib/main.sh
. "${CIS_LIB_DIR}"/main.sh
else
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
exit 128
fi