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7.2.5_ignore_broadcast_requests.sh 7.2.6_enable_bad_error_message_protection.sh 7.2.7_enable_source_route_validation.sh 7.2.8_enable_tcp_syn_cookies.sh

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thibault.dewailly 2016-04-13 16:07:16 +02:00
parent 4aaa87b709
commit c119e8d0f2
8 changed files with 288 additions and 0 deletions
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70
bin/hardening/7.2.5_ignore_broadcast_requests.sh Executable file
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#!/bin/bash
#
# CIS Debian 7 Hardening
# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
#
#
# 7.2.5 Enable Ignore Broadcast Requests (Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
SYSCTL_PARAMS='net.ipv4.icmp_echo_ignore_broadcasts=1'
# This function will be called if the script status is on enabled / audit mode
audit () {
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
}
# This function will be called if the script status is on enabled mode
apply () {
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
}
# 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

70
bin/hardening/7.2.6_enable_bad_error_message_protection.sh Executable file
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#!/bin/bash
#
# CIS Debian 7 Hardening
# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
#
#
# 7.2.6 Enable Bad Error Message Protection (Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
SYSCTL_PARAMS='net.ipv4.icmp_ignore_bogus_error_responses=1'
# This function will be called if the script status is on enabled / audit mode
audit () {
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
}
# This function will be called if the script status is on enabled mode
apply () {
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
}
# 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

70
bin/hardening/7.2.7_enable_source_route_validation.sh Executable file
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#!/bin/bash
#
# CIS Debian 7 Hardening
# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
#
#
# 7.2.7 Enable RFC-recommended Source Route Validation (Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
SYSCTL_PARAMS='net.ipv4.conf.all.rp_filter=1 net.ipv4.conf.default.rp_filter=1'
# This function will be called if the script status is on enabled / audit mode
audit () {
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
}
# This function will be called if the script status is on enabled mode
apply () {
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
}
# 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

70
bin/hardening/7.2.8_enable_tcp_syn_cookies.sh Executable file
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#!/bin/bash
#
# CIS Debian 7 Hardening
# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
#
#
# 7.2.8 Enable TCP SYN Cookies (Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
SYSCTL_PARAMS='net.ipv4.tcp_syncookies=1'
# This function will be called if the script status is on enabled / audit mode
audit () {
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
}
# This function will be called if the script status is on enabled mode
apply () {
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
}
# 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/7.2.5_ignore_broadcast_requests.cfg Normal file
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# Configuration for script of same name
status=enabled

2
etc/conf.d/7.2.6_enable_bad_error_message_protection.cfg Normal file
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# Configuration for script of same name
status=enabled

2
etc/conf.d/7.2.7_enable_source_route_validation.cfg Normal file
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# Configuration for script of same name
status=enabled

2
etc/conf.d/7.2.8_enable_tcp_syn_cookies.cfg Normal file
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# Configuration for script of same name
status=enabled