diff --git a/bin/hardening/7.3.2_disable_ipv6_redirect.sh b/bin/hardening/7.3.2_disable_ipv6_redirect.sh new file mode 100755 index 0000000..594bbd3 --- /dev/null +++ b/bin/hardening/7.3.2_disable_ipv6_redirect.sh @@ -0,0 +1,80 @@ +#!/bin/bash + +# +# CIS Debian 7 Hardening +# Authors : Thibault Dewailly, OVH +# + +# +# 7.3.2 Disable IPv6 Redirect Acceptance (Not Scored) +# + +set -e # One error, it's over +set -u # One variable unset, it's over + +SYSCTL_PARAMS='net.ipv6.conf.all.accept_redirects=0 net.ipv6.conf.default.accept_redirects=0' + +# This function will be called if the script status is on enabled / audit mode +audit () { + does_sysctl_param_exists "net.ipv6" + if [ $FNRET != 0 ]; then + ok "ipv6 is disabled" + else + for SYSCTL_VALUES in $SYSCTL_PARAMS; do + SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1) + SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2) + debug "$SYSCTL_PARAM must have $SYSCTL_EXP_RESULT" + has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT + if [ $FNRET != 0 ]; then + crit "$SYSCTL_PARAM has not $SYSCTL_EXP_RESULT value !" + elif [ $FNRET = 255 ]; then + warn "$SYSCTL_PARAM does not exist, typo ?" + else + ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT" + fi + done + fi +} + +# This function will be called if the script status is on enabled mode +apply () { + does_sysctl_param_exists "net.ipv6" + if [ $FNRET != 0 ]; then + ok "ipv6 is disabled" + else + for SYSCTL_VALUES in $SYSCTL_PARAMS; do + SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1) + SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2) + debug "$SYSCTL_PARAM must have $SYSCTL_EXP_RESULT" + has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT + if [ $FNRET != 0 ]; then + warn "$SYSCTL_PARAM has not $SYSCTL_EXP_RESULT value, correcting it" + set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT + sysctl -w net.ipv4.route.flush=1 > /dev/null + elif [ $FNRET = 255 ]; then + warn "$SYSCTL_PARAM does not exist, typo ?" + else + ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT" + fi + done + fi +} + +# This function will check config parameters required +check_config() { + : +} + +# Source Root Dir Parameter +if [ ! -r /etc/default/cis-hardenning ]; then + echo "There is no /etc/default/cis-hardenning file, cannot source CIS_ROOT_DIR variable, aborting" + exit 128 +else + . /etc/default/cis-hardenning + if [ -z $CIS_ROOT_DIR ]; then + echo "No CIS_ROOT_DIR variable, aborting" + fi +fi + +# Main function, will call the proper functions given the configuration (audit, enabled, disabled) +[ -r $CIS_ROOT_DIR/lib/main.sh ] && . $CIS_ROOT_DIR/lib/main.sh diff --git a/etc/conf.d/7.3.2_disable_ipv6_redirect.cfg b/etc/conf.d/7.3.2_disable_ipv6_redirect.cfg new file mode 100644 index 0000000..e1e4502 --- /dev/null +++ b/etc/conf.d/7.3.2_disable_ipv6_redirect.cfg @@ -0,0 +1,2 @@ +# Configuration for script of same name +status=enabled