debian-cis/bin/hardening/2.2.15_mta_localhost.sh
Thibault Ayanides c17d04ecc2 IMP(shellcheck): comply with shellcheck rules
I added shellcheck prefixes to fix:
 * SC1091 (following sourced files)
 * SC2034 (unused variables)
2020-11-27 09:18:00 +01:00

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#!/bin/bash
# run-shellcheck
#
# CIS Debian Hardening
#
#
# 2.2.15 Ensure Mail Transfer Agent is configured for Local-Only Mode (Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
# shellcheck disable=2034
HARDENING_LEVEL=3
# shellcheck disable=2034
DESCRIPTION="Configure Mail Transfert Agent for Local-Only Mode."
# shellcheck disable=2034
HARDENING_EXCEPTION=mail
# This function will be called if the script status is on enabled / audit mode
audit () {
info "Checking netport ports opened"
RESULT=$($SUDO_CMD netstat -an | grep LIST | grep ":25[[:space:]]") || :
RESULT=${RESULT:-}
debug "Result is $RESULT"
if [ -z "$RESULT" ]; then
ok "Nothing listens on 25 port, probably unix socket configured"
else
info "Checking $RESULT"
if $(grep -q "127.0.0.1" <<< $RESULT); then
ok "MTA is configured to localhost only"
else
crit "MTA listens worldwide"
fi
fi
}
# This function will be called if the script status is on enabled mode
apply () {
info "Checking netport ports opened"
RESULT=$(netstat -an | grep LIST | grep ":25[[:space:]]") || :
RESULT=${RESULT:-}
debug "Result is $RESULT"
if [ -z "$RESULT" ]; then
ok "Nothing listens on 25 port, probably unix socket configured"
else
info "Checking $RESULT"
if $(grep -q "127.0.0.1" <<< $RESULT); then
ok "MTA is configured to localhost only"
else
warn "MTA listens worldwide, correct this considering your MTA"
fi
fi
:
}
# This function will check config parameters required
check_config() {
:
}
# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
# shellcheck source=../../debian/default
. /etc/default/cis-hardening
fi
if [ -z "$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
# shellcheck source=../../lib/main.sh
. $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