mirror of https://github.com/CISOfy/lynis.git
80 lines
3.6 KiB
Bash
80 lines
3.6 KiB
Bash
#!/bin/sh
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#################################################################################
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#
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# Lynis
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# ------------------
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#
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# Copyright 2007-2013, Michael Boelen
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# Copyright 2013-2016, CISOfy
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#
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# Website : https://cisofy.com
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# Blog : http://linux-audit.com
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# GitHub : https://github.com/CISOfy/lynis
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#
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# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
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# welcome to redistribute it under the terms of the GNU General Public License.
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# See LICENSE file for usage of this software.
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#
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#################################################################################
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#
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# Kernel
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#
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#################################################################################
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#
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InsertSection "Kernel Hardening"
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#
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#################################################################################
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#
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# Test : KRNL-6000
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# Description : Check sysctl parameters
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# Sysctl : net.ipv4.icmp_ingore_bogus_error_responses (=1)
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if [ ! "${SYSCTL_READKEY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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Register --test-no KRNL-6000 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check sysctl key pairs in scan profile"
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if [ ${SKIPTEST} -eq 0 ]; then
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FOUND=0
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N=0
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Display --indent 2 --text "- Comparing sysctl key pairs with scan profile"
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for PROFILE in ${PROFILES}; do
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FIND=`grep "^sysctl:" ${PROFILE} | sed 's/ /-space-/g'`
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for I in ${FIND}; do
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tFINDkey=`echo ${I} | awk -F: '{ print $2 }'`
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tFINDexpvalue=`echo ${I} | awk -F: '{ print $3 }'`
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tFINDhp=`echo ${I} | awk -F: '{ print $4 }' | grep "[0-9]"`
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tFINDdesc=`echo ${I} | awk -F: '{ print $5 }' | sed 's/-space-/ /g'`
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tFINDcurvalue=`${SYSCTL_READKEY} ${tFINDkey} 2> /dev/null`
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if [ ! "${tFINDcurvalue}" = "" ]; then
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if [ "${tFINDexpvalue}" = "${tFINDcurvalue}" ]; then
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LogText "Result: sysctl key ${tFINDkey} contains equal expected and current value (${tFINDexpvalue})"
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Display --indent 4 --text "- ${tFINDkey} (exp: ${tFINDexpvalue})" --result OK --color GREEN
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AddHP ${tFINDhp} ${tFINDhp}
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else
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LogText "Result: sysctl key ${tFINDkey} has a different value than expected in scan profile. Expected=${tFINDexpvalue}, Real=${tFINDcurvalue}"
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Display --indent 4 --text "- ${tFINDkey} (exp: ${tFINDexpvalue})" --result DIFFERENT --color RED
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AddHP 0 ${tFINDhp}
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FOUND=1
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N=`expr ${N} + 1`
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ReportDetails --test "${TEST_NO}" --service "sysctl" --field "${tFINDkey}" --value "${tFINDcurvalue}" --preferredvalue "${tFINDexpvalue}" --description "${tFINDdesc}"
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fi
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else
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LogText "Result: key ${tFINDkey} does not exist on this machine"
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fi
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done
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done
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# Add suggestion if one or more sysctls have a different value than scan profile
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if [ ${FOUND} -eq 1 ]; then
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LogText "Result: found ${N} keys that can use tuning, according scan profile"
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ReportSuggestion ${TEST_NO} "One or more sysctl values differ from the scan profile and could be tweaked"
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fi
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fi
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#
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#################################################################################
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#
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wait_for_keypress
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#
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#================================================================================
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# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com
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