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7.3.1_disable_ipv6_router_advertisement.sh

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This commit is contained in:
thibault.dewailly 2016-04-13 17:41:10 +02:00
parent e81778e615
commit df51ac5bcb
3 changed files with 109 additions and 6 deletions
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80
bin/hardening/7.3.1_disable_ipv6_router_advertisement.sh Executable file
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@ -0,0 +1,80 @@
#!/bin/bash
#
# CIS Debian 7 Hardening
# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
#
#
# 7.3.1 Disable IPv6 Router Advertisements (Not Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
SYSCTL_PARAMS='net.ipv6.conf.all.accept_ra=0 net.ipv6.conf.default.accept_ra=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

2
etc/conf.d/7.3.1_disable_ipv6_router_advertisement.cfg Normal file
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@ -0,0 +1,2 @@
# Configuration for script of same name
status=enabled

33
lib/utils.sh
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@ -1,7 +1,7 @@
# CIS Debian 7 Hardening Utility functions
#
# Sysctl Manipulation
# Sysctl
#
has_sysctl_param_expected_result() {
@ -19,6 +19,16 @@ has_sysctl_param_expected_result() {
fi
}
does_sysctl_param_exists() {
local SYSCTL_PARAM=$1
if [ "$(sysctl -a 2>/dev/null |grep "$SYSCTL_PARAM" -c)" = 0 ]; then
FNRET=1
else
FNRET=0
fi
}
set_sysctl_param() {
local SYSCTL_PARAM=$1
local VALUE=$2
@ -35,7 +45,18 @@ set_sysctl_param() {
}
#
# Dmesg Manipulation
# Network
#
is_ipv6_disabled_by_bootloader() {
#if
#
:
}
#
# Dmesg
#
does_pattern_exists_in_dmesg() {
@ -48,7 +69,7 @@ does_pattern_exists_in_dmesg() {
}
#
# File manipulation
# File
#
does_file_exist() {
@ -130,7 +151,7 @@ replace_in_file() {
}
#
# User manipulation
# Users and groups
#
does_user_exist() {
@ -188,7 +209,7 @@ is_kernel_option_enabled() {
}
#
# Mounting point manipulation
# Mounting point
#
# Verify $1 is a partition declared in fstab
@ -263,7 +284,7 @@ remount_partition() {
}
#
# APT manipulation
# APT
#
apt_update_if_needed()