mirror of
https://github.com/ovh/debian-cis.git
synced 2024-11-24 06:21:24 +01:00
32886d3a3d
* Replace CIS_ROOT_DIR by a more flexible system * Try to adapt the logic change to the functional tests
83 lines
2.3 KiB
Bash
Executable File
83 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
# run-shellcheck
|
|
#
|
|
# OVH Security audit
|
|
#
|
|
|
|
#
|
|
# 3.5.4.1.1 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
|