debian-cis/bin/hardening/99.4_net_fw_default_policy_drop.sh
Charles Herlin d2bbf754ac Migrate generic checks from secaudit to cis-hardening
new file:   99.3.1_acc_shadow_sha512.sh
new file:   99.3.2_acc_sudoers_no_all.sh
new file:   99.4_net_fw_default_policy_drop.sh
new file:   99.5.1_ssh_auth_pubk_only.sh
new file:   99.5.2.1_ssh_cry_kex.sh
new file:   99.5.2.2_ssh_cry_mac.sh
new file:   99.5.2.3_ssh_cry_rekey.sh
new file:   99.5.3_ssh_disable_features.sh
new file:   99.5.4_ssh_keys_from.sh
new file:   99.5.5_ssh_strict_modes.sh
new file:   99.5.6_ssh_sys_accept_env.sh
new file:   99.5.7_ssh_sys_no_legacy.sh
new file:   99.5.8_ssh_sys_sandbox.sh
new file:   99.5.9_ssh_log_level.sh

Fix descriptions in comment section for 99.* secaudit checks

Remove duplicated legacy services that are already taken care of by vanilla cis

Enable custom configuration of checks in config-file, no more hard coded conf
Add test to disable check if debian version is too old
Add excused IPs while checking "from" field of authorized_keys
Escaping dots in IPs
Manage Kex for different debian versions
Add tests for generic checks and add apply for ssh config
Apply shellcheck recommendations on audit/hardening scripts
Update script to check for allowed IPs only, remove bastion related
Fill `apply` func for ssh config related scripts
Add and update tests scenarii

Disable shellcheck test for external source 1091

As of today, the entire project is not shellcheck compliant, I prefer
disabling the test that warns about not finding external source (that
arent compliant). I will enable it again when the project library will
be shellchecked
https://github.com/koalaman/shellcheck/wiki/SC1091

Refactor password policy check with one check by feature

Previous file will now only look for bad passwords in /etc/shadow
I added two checks that look for the compliant configuration lines in
conf files /etc/logins.defs and /etc/pam.d/common-passwords

FIX: merge chained sed and fix regex

FIX: update regex to capture more output
FIX: fix pattern to ignore commented lines, add apply

Also add tests to ensure that commented lines are not detected as valid
configuration

CHORE: cleanup test situation with file and users removal
IMP: add case insensitive option when looking for patterns in files
CHORE: removed duplicated line in test file
2019-02-11 18:05:03 +01:00

79 lines
2.2 KiB
Bash
Executable File

#!/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