#!/bin/sh

#################################################################################
#
#   Lynis
# ------------------
#
# Copyright 2007-2015, Michael Boelen (michael@rootkit.nl), The Netherlands
# Web site: http://www.rootkit.nl
#
# 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.
#
#################################################################################
#
# Kernel
#
#################################################################################
#
    InsertSection "Kernel Hardening"
#
#################################################################################
#
    # Test        : KRNL-6000
    # Description : Check sysctl parameters
    # Sysctl      : net.ipv4.icmp_ingore_bogus_error_responses (=1)
    if [ ! "${SYSCTL_READKEY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no KRNL-6000 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check sysctl key pairs in scan profile"
    if [ ${SKIPTEST} -eq 0 ]; then
        N=0
        Display --indent 2 --text "- Comparing sysctl key pairs with scan profile"
        FIND=`grep "^sysctl:" ${PROFILE} | sed 's/ /:space:/g'`
        for I in ${FIND}; do
            tFINDkey=`echo ${I} | awk -F: '{ print $2 }'`
            tFINDexpvalue=`echo ${I} | awk -F: '{ print $3 }'`
            tFINDhp=`echo ${I} | awk -F: '{ print $4 }' | grep "[0-9]"`
            tFINDdesc=`echo ${I} | awk -F: '{ print $5 }' | sed 's/:space:/ /g'`
            tFINDcurvalue=`${SYSCTL_READKEY} ${tFINDkey} 2> /dev/null`
            if [ ! "${tFINDcurvalue}" = "" ]; then
                if [ "${tFINDexpvalue}" = "${tFINDcurvalue}" ]; then
                    logtext "Result: sysctl key ${tFINDkey} contains equal expected and current value (${tFINDexpvalue})"
                    Display --indent 4 --text "- ${tFINDkey} (exp: ${tFINDexpvalue})" --result OK --color GREEN
                    AddHP ${tFINDhp} ${tFINDhp}
                  else
                    logtext "Result: sysctl key ${tFINDkey} has a different value than expected in scan profile. Expected=${tFINDexpvalue}, Real=${tFINDcurvalue}"
                    Display --indent 4 --text "- ${tFINDkey} (exp: ${tFINDexpvalue})" --result DIFFERENT --color RED
                    AddHP 0 ${tFINDhp}
                    N=1
                fi
              else
                logtext "Result: key ${tFINDkey} does not exist on this machine"
            fi
        done

        # Add suggestion if one or more sysctls have a different value than scan profile
        if [ ${N} -eq 1 ]; then
            ReportSuggestion ${TEST_NO} "One or more sysctl values differ from the scan profile and could be tweaked"
        fi
    fi
#
#################################################################################
#

wait_for_keypress

#
#================================================================================
# Lynis - Copyright 2007-2015, Michael Boelen - http://cisofy.com - The Netherlands