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Samson-W 2019-04-09 04:03:38 +08:00
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commit 3be3101d13
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bin/hardening/7.7.5_ensure_loopback_traffic_is_configured.sh Executable file
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#!/bin/bash
#
# harbian audit 9 Hardening
#
#
# 7.7.5 Ensure loopback traffic is configured (Scored)
# Include ipv4 and ipv6
# Add this feature:Authors : Samson wen, Samson <sccxboy@gmail.com>
#
set -e # One error, it's over
set -u # One variable unset, it's over
HARDENING_LEVEL=2
IPS4=$(which iptables)
IPS6=$(which ip6tables)
# This function will be called if the script status is on enabled / audit mode
audit () {
if [ $(${IPS4} -S | grep -c "^\-A INPUT \-i lo \-j ACCEPT") -eq 0 -o $(${IPS4} -S | grep -c "^\-A INPUT \-i 127.0.0.1 \-j ACCEPT") -eq 0 ]; then
crit "Ip4tables: loopback traffic INPUT is not configured!"
if [ $(${IPS6} -S | grep -c "^\-A INPUT \-i lo \-j ACCEPT") -eq 0 -o $(${IPS6} -S | grep -c "^\-A INPUT \-i 127.0.0.1 \-j ACCEPT") -eq 0 ]; then
crit "Ip6tables: loopback traffic INPUT is not configured!"
FNRET=1
return $FNRET
else
ok "Ip6tables loopback traffic INPUT has configured!"
FNRET=0
fi
else
ok "Ip4tables loopback traffic INPUT has configured!"
FNRET=0
fi
if [ $(${IPS4} -S | grep -c "^\-A INPUT \-i lo \-j ACCEPT") -eq 0 -o $(${IPS4} -S | grep -c "^\-A INPUT \-i 127.0.0.1 \-j ACCEPT") -eq 0 ]; then
crit "Ip4tables: loopback traffic INPUT is not configured!"
if [ $(${IPS6} -S | grep -c "^\-A INPUT \-i lo \-j ACCEPT") -eq 0 -o $(${IPS6} -S | grep -c "^\-A INPUT \-i 127.0.0.1 \-j ACCEPT") -eq 0 ]; then
crit "Ip6tables: loopback traffic INPUT is not configured!"
FNRET=1
return $FNRET
else
ok "Ip6tables loopback traffic INPUT has configured!"
FNRET=0
fi
else
ok "Ip4tables loopback traffic INPUT has configured!"
FNRET=0
fi
if [ $(${IPS4} -S | grep -c "^\-A INPUT \-i lo \-j ACCEPT") -eq 0 -o $(${IPS4} -S | grep -c "^\-A INPUT \-i 127.0.0.1 \-j ACCEPT") -eq 0 ]; then
crit "Ip4tables: loopback traffic INPUT is not configured!"
if [ $(${IPS6} -S | grep -c "^\-A INPUT \-i lo \-j ACCEPT") -eq 0 -o $(${IPS6} -S | grep -c "^\-A INPUT \-i 127.0.0.1 \-j ACCEPT") -eq 0 ]; then
crit "Ip6tables: loopback traffic INPUT is not configured!"
FNRET=1
return $FNRET
else
ok "Ip6tables loopback traffic INPUT has configured!"
FNRET=0
fi
else
ok "Ip4tables loopback traffic INPUT has configured!"
FNRET=0
fi
}
# This function will be called if the script status is on enabled mode
apply () {
if [ $FNRET = 0 ]; then
ok "Iptables/Ip6tables has set default deny for firewall policy!"
else
warn "Iptables/Ip6tables is not set default deny for firewall policy! need the administrator to manually add it. Howto set: iptables/ip6tables -P INPUT DROP; iptables/ip6tables -P OUTPUT DROP; iptables/ip6tables -P FORWARD DROP."
fi
}
# This function will check config parameters required
check_config() {
:
}
# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
. /etc/default/cis-hardening
fi
if [ -z "$CIS_ROOT_DIR" ]; then
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
echo "Cannot source CIS_ROOT_DIR variable, aborting."
exit 128
fi
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
. $CIS_ROOT_DIR/lib/main.sh
else
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
exit 128
fi