mirror of
https://github.com/ovh/debian-cis.git
synced 2024-12-23 14:35:26 +01:00
79 lines
2.2 KiB
Bash
79 lines
2.2 KiB
Bash
|
#!/bin/bash
|
||
|
|
# run-shellcheck
|
||
|
|
#
|
||
|
|
# OVH Security audit
|
||
|
|
#
|
||
|
|
|
||
|
|
#
|
||
|
|
# Check iptables firewall default policy for DROP on INPUT and FORWARD.
|
||
|
|
#
|
||
|
|
|
||
|
|
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"
|
||
|
|
|
||
|
|
# 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 $PACKAGE -nL || true )
|
||
|
|
if [[ -z $ipt ]]; then
|
||
|
|
crit "Empty return from $PACKAGE 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
|
||
|
|
echo "cant find chain $chain"
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
# This function will be called if the script status is on enabled mode
|
||
|
|
apply () {
|
||
|
|
:
|
||
|
|
}
|
||
|
|
|
||
|
|
# This function will check config parameters required
|
||
|
|
check_config() {
|
||
|
|
:
|
||
|
|
}
|
||
|
|
|
||
|
|
# Source Root Dir Parameter
|
||
|
|
if [ -r /etc/default/cis-hardening ]; then
|
||
|
|
. /etc/default/cis-hardening
|
||
|
|
fi
|
||
|
|
if [ -z "$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 "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||
|
|
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||
|
|
. "$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
|