From 0cf8bd3dd83a191cd9f24c20c237ad22c5aafa6b Mon Sep 17 00:00:00 2001
From: "thibault.dewailly" <thibault.dewailly@ovh.net>
Date: Wed, 13 Apr 2016 21:19:26 +0200
Subject: [PATCH] 7.3.3_disable_ipv6.sh

---
 bin/hardening/7.3.3_disable_ipv6.sh | 80 +++++++++++++++++++++++++++++
 etc/conf.d/7.3.3_disable_ipv6.cfg   |  2 +
 2 files changed, 82 insertions(+)
 create mode 100755 bin/hardening/7.3.3_disable_ipv6.sh
 create mode 100644 etc/conf.d/7.3.3_disable_ipv6.cfg

diff --git a/bin/hardening/7.3.3_disable_ipv6.sh b/bin/hardening/7.3.3_disable_ipv6.sh
new file mode 100755
index 0000000..a1a325d
--- /dev/null
+++ b/bin/hardening/7.3.3_disable_ipv6.sh
@@ -0,0 +1,80 @@
+#!/bin/bash
+
+#
+# CIS Debian 7 Hardening
+# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
+#
+
+#
+# 7.3.3 Disable IPv6 (Not Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+SYSCTL_PARAMS='net.ipv6.conf.all.disable_ipv6=1 net.ipv6.conf.default.disable_ipv6=1 net.ipv6.conf.lo.disable_ipv6=1'
+
+# 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
+                warn "you may want to reboot or sysctl -p a file including $SYSCTL_PARAMS"
+            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/7.3.3_disable_ipv6.cfg b/etc/conf.d/7.3.3_disable_ipv6.cfg
new file mode 100644
index 0000000..e1e4502
--- /dev/null
+++ b/etc/conf.d/7.3.3_disable_ipv6.cfg
@@ -0,0 +1,2 @@
+# Configuration for script of same name
+status=enabled