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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2007-2018, CISOfy
#
# Website : https://cisofy.com
# Blog : http://linux-audit.com
# GitHub : https://github.com/CISOfy/lynis
#
# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
# welcome to redistribute it under the terms of the GNU General Public License.
# See LICENSE file for usage of this software.
#
#################################################################################
#
# DNS
#
#################################################################################
#
SIGOKDNS="sigok.verteiltesysteme.net" # adress with good DESSEC signiture
SIGFAILDNS="sigfail.verteiltesysteme.net" # adress with bad DESSEC signiture
# TODO update it once cisofy.com records are created
# TODO after update even IP match can be checked to detect highjacking
TIMEOUT=";; connection timed out; no servers could be reached"
#
#################################################################################
#
InsertSection "DNS"
#
#################################################################################
#
# Test : DNS-1600
# Description : Validate DNSSEC signiture is checked
Register --test-no DNS-1600 --weight L --network YES --category security --description "Validate DNSSEC igniture is checked"
if [ "${SKIPTEST}" -eq 0 ]; then
if [ ! -z "${DIGBINARY}" ]; then
GOOD=$("${DIGBINARY}" +short +time=1 $SIGOKDNS)
BAD=$("${DIGBINARY}" +short +time=1 $SIGFAILDNS)
if [ "$GOOD" = "$TIMEOUT" ] && [ "$BAD" = "$TIMEOUT" ]; then
LogText "Result: Exception found, can't determine DNSSEC validation"
Display --indent 4 --text "- Checking DNSSEC validation" --result "${STATUS_UNKOWN}" --color YELLOW
ReportException "${TEST_NO}" "Exception found, both query failed, due to connection timeout"
elif [ -z "$GOOD" ] && ! [ -z "$BAD" ]; then
LogText "Result: Exception found, can't determine DNSSEC validation"
Display --indent 4 --text "- Checking DNSSEC validation" --result "${STATUS_UNKOWN}" --color YELLOW
ReportException "${TEST_NO}" "Exception found, OK failed, Bad signiture was accepted"
elif ! [ -z "$GOOD" ] && ! [ -z "$BAD" ]; then
Display --indent 4 --text "- Checking DNSSEC validation" --result "${STATUS_SUGGESTION}" --color YELLOW
LogText "Note: Useing DNSsec validation can protect from DNS highjacking"
ReportSuggestion "${TEST_NO}" "Malformated DNS querys are accepted, Configure DNSSEC valdating name servers"
AddHP 2 2
elif ! [ -z "$GOOD" ] && [ -z "$BAD" ]; then
Display --indent 4 --text "- Checking DNSSEC validation" --result "${STATUS_OK}" --color GREEN
LogText "Result: Malformated DNS responses were ignored"
AddHP 0 2
fi
else
Display --indent 4 --text "- DESSEC validation" --result "${STATUS_SKIPPED}" --color YELLOW
LogText "Result: dig not installed, test can't be fully performed"
fi
else
LogText "Result: Test was skipped"
fi
#
#################################################################################
#
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