diff --git a/bin/hardening/nftables_has_base_chains.sh b/bin/hardening/nftables_has_base_chains.sh new file mode 100755 index 0000000..f25721c --- /dev/null +++ b/bin/hardening/nftables_has_base_chains.sh @@ -0,0 +1,94 @@ +#!/bin/bash + +# run-shellcheck +# +# CIS Debian Hardening +# + +# +# Ensure nftables base chains exist (Automated) +# + +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="Ensure nftables base chains exist" + +# This function will be called if the script status is on enabled / audit mode +audit() { + INPUT_CHAIN=1 + OUTPUT_CHAIN=1 + FORWARD_CHAIN=1 + + if nft list ruleset | grep 'hook input'; then + INPUT_CHAIN=0 + ok "nft base input chain exist" + else + crit "nft base input chain does not exist" + fi + + if nft list ruleset | grep 'hook output'; then + OUTPUT_CHAIN=0 + ok "nft base output chain exist" + else + crit "nft base output chain does not exist" + fi + + if nft list ruleset | grep 'hook forward'; then + FORWARD_CHAIN=0 + ok "nft base forward chain exist" + else + crit "nft base forward chain does not exist" + fi +} + +# This function will be called if the script status is on enabled mode +apply() { + audit + if [ "$INPUT_CHAIN" -eq 1 ]; then + info "adding nft base input chain" + # shellcheck disable=1083 + nft create chain inet filter input { type filter hook input priority 0 \; } + fi + + if [ "$OUTPUT_CHAIN" -eq 1 ]; then + info "adding nft base output chain" + # shellcheck disable=1083 + nft create chain inet filter output { type filter hook output priority 0 \; } + fi + + if [ "$FORWARD_CHAIN" -eq 1 ]; then + info "adding nft base forward chain" + # shellcheck disable=1083 + nft create chain inet filter forward { type filter hook forward priority 0 \; } + fi +} + +# This function will check config parameters required +check_config() { + : +} + +# Source Root Dir Parameter +if [ -r /etc/default/cis-hardening ]; then + # shellcheck source=../../debian/default + . /etc/default/cis-hardening +fi + +if [ -z "$CIS_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 $CIS_LIB_DIR in /etc/default/cis-hardening" + exit 128 +fi diff --git a/bin/hardening/nftables_has_table.sh b/bin/hardening/nftables_has_table.sh new file mode 100755 index 0000000..e76d264 --- /dev/null +++ b/bin/hardening/nftables_has_table.sh @@ -0,0 +1,67 @@ +#!/bin/bash + +# run-shellcheck +# +# CIS Debian Hardening +# + +# +# Ensure a nftables table exists (Automated) +# + +set -e # One error, it's over +set -u # One variable unset, it's over + +# shellcheck disable=2034 +HARDENING_LEVEL=2 +# shellcheck disable=2034 +DESCRIPTION="Ensure a nftables table exists" + +# This function will be called if the script status is on enabled / audit mode +audit() { + NFTABLES_HAS_TABLES=0 + local tables + tables=$(nft list tables | wc -l) + if [ "$tables" -eq 0 ]; then + crit "There are no nft tables" + NFTABLES_HAS_TABLES=1 + else + ok "There are $tables nft tables" + fi + +} + +# This function will be called if the script status is on enabled mode +apply() { + audit + if [ "$NFTABLES_HAS_TABLES" -eq 1 ]; then + info "Adding 'filter' nft table" + nft create table inet filter + 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 "$CIS_LIB_DIR" ]; then + echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment." + echo "Cannot source CIS_LIB_DIR variable, aborting." + exit 128 +fi + +# Main function, will call the proper functions given the configuration (audit, enabled, disabled) +if [ -r "${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 $CIS_LIB_DIR in /etc/default/cis-hardening" + exit 128 +fi diff --git a/bin/hardening/nftables_is_enabled.sh b/bin/hardening/nftables_is_enabled.sh new file mode 100755 index 0000000..7f7666b --- /dev/null +++ b/bin/hardening/nftables_is_enabled.sh @@ -0,0 +1,68 @@ +#!/bin/bash + +# run-shellcheck +# +# CIS Debian Hardening +# + +# +# Ensure nftables service is enabled (Automated) +# + +set -e # One error, it's over +set -u # One variable unset, it's over + +# shellcheck disable=2034 +HARDENING_LEVEL=2 +# shellcheck disable=2034 +DESCRIPTION="Ensure nftables service is enabled" +SERVICE="nftables.service" + +# This function will be called if the script status is on enabled / audit mode +audit() { + SERVICE_ENABLED=1 + + is_service_enabled "$SERVICE" + if [ "$FNRET" -eq 0 ]; then + ok "$SERVICE is enabled" + SERVICE_ENABLED=0 + else + crit "$SERVICE is not enabled" + fi + +} + +# This function will be called if the script status is on enabled mode +apply() { + audit + if [ "$SERVICE_ENABLED" -ne 0 ]; then + manage_service unmask "$SERVICE" + manage_service enable "$SERVICE" + 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 "$CIS_LIB_DIR" ]; then + echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment." + echo "Cannot source CIS_LIB_DIR variable, aborting." + exit 128 +fi + +# Main function, will call the proper functions given the configuration (audit, enabled, disabled) +if [ -r "${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 $CIS_LIB_DIR in /etc/default/cis-hardening" + exit 128 +fi diff --git a/tests/hardening/nftables_has_base_chains.sh b/tests/hardening/nftables_has_base_chains.sh new file mode 100644 index 0000000..0bacb31 --- /dev/null +++ b/tests/hardening/nftables_has_base_chains.sh @@ -0,0 +1,11 @@ +# shellcheck shell=bash +# run-shellcheck +test_audit() { + # running on a non privilieged container, wont test much... + describe Running on blank host + register_test retvalshouldbe 1 + dismiss_count_for_test + # shellcheck disable=2154 + run blank "${CIS_CHECKS_DIR}/${script}.sh" --audit-all + +} diff --git a/tests/hardening/nftables_has_table.sh b/tests/hardening/nftables_has_table.sh new file mode 100644 index 0000000..0bacb31 --- /dev/null +++ b/tests/hardening/nftables_has_table.sh @@ -0,0 +1,11 @@ +# shellcheck shell=bash +# run-shellcheck +test_audit() { + # running on a non privilieged container, wont test much... + describe Running on blank host + register_test retvalshouldbe 1 + dismiss_count_for_test + # shellcheck disable=2154 + run blank "${CIS_CHECKS_DIR}/${script}.sh" --audit-all + +} diff --git a/tests/hardening/nftables_is_enabled.sh b/tests/hardening/nftables_is_enabled.sh new file mode 100644 index 0000000..00ec662 --- /dev/null +++ b/tests/hardening/nftables_is_enabled.sh @@ -0,0 +1,10 @@ +# shellcheck shell=bash +# run-shellcheck +test_audit() { + describe Running on blank host + register_test retvalshouldbe 0 + dismiss_count_for_test + # shellcheck disable=2154 + run blank "${CIS_CHECKS_DIR}/${script}.sh" --audit-all + +}