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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright (c) Michael Boelen, CISOfy, and many contributors.
#
# Website : https://cisofy.com
# Blog : https://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.
#
#################################################################################
#
# Memory and processes
#
#################################################################################
#
InsertSection "${SECTION_MEMORY_AND_PROCESSES}"
#
#################################################################################
#
# Test : PROC-3602
# Description : Query /proc/meminfo
Register --test-no PROC-3602 --os Linux --weight L --network NO --category security --description "Checking /proc/meminfo for memory details"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f ${ROOTDIR}proc/meminfo ]; then
LogText "Result: found ${ROOTDIR}proc/meminfo"
Display --indent 2 --text "- Checking ${ROOTDIR}proc/meminfo" --result "${STATUS_FOUND}" --color GREEN
FIND=$(${AWKBINARY} '/^MemTotal/ { print $2, $3 }' ${ROOTDIR}proc/meminfo)
MEMORY_SIZE=$(echo ${FIND} | ${AWKBINARY} '{ print $1 }')
MEMORY_UNITS=$(echo ${FIND} | ${AWKBINARY} '{ print $2 }')
LogText "Result: Found ${MEMORY_SIZE} ${MEMORY_UNITS} memory"
Report "memory_size=${MEMORY_SIZE}"
Report "memory_units=${MEMORY_UNITS}"
else
LogText "Result: ${ROOTDIR}proc/meminfo file not found on this system"
fi
fi
#
#################################################################################
#
# Test : PROC-3604
# Description : Query /proc/meminfo
# Notes : TODO - prtconf replacement
Register --test-no PROC-3604 --os Solaris --weight L --network NO --category security --description "Query prtconf for memory details"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Searching /usr/sbin/prtconf"
if [ -x /usr/sbin/prtconf ]; then
Display --indent 2 --text "- Querying prtconf for installed memory" --result "${STATUS_DONE}" --color GREEN
MEMORY_SIZE=$(/usr/sbin/prtconf | ${GREPBINARY} "^Memory size:" | ${CUTBINARY} -d ' ' -f3)
MEMORY_UNITS=$(/usr/sbin/prtconf | ${GREPBINARY} "^Memory size:" | ${CUTBINARY} -d ' ' -f4)
LogText "Result: Found ${MEMORY_SIZE} ${MEMORY_UNITS} memory"
Report "memory_size=${MEMORY_SIZE}"
Report "memory_units=${MEMORY_UNITS}"
else
Display --indent 2 --text "- Querying prtconf for installed memory" --result "${STATUS_SKIPPED}" --color WHITE
LogText "Result: /usr/sbin/prtconf not found"
fi
fi
#
#################################################################################
#
# Test : PROC-3612
# Description : Searching for dead and zombie processes
# Notes : Don't perform test on Solaris
if [ ! "${OS}" = "Solaris" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PROC-3612 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check dead or zombie processes"
if [ ${SKIPTEST} -eq 0 ]; then
if [ "${OS}" = "AIX" ]; then
FIND=$(${PSBINARY} -Ae -o pid,stat,comm | ${AWKBINARY} '{ if ($2 ~ /Z|X/) print $1 }' | ${XARGSBINARY})
else
FIND=$(${PSBINARY} x -o pid,stat,comm | ${AWKBINARY} '{ if ($2 ~ /Z|X/) print $1 }' | ${XARGSBINARY})
fi
if [ -z "${FIND}" ]; then
LogText "Result: no zombie processes found"
Display --indent 2 --text "- Searching for dead/zombie processes" --result "${STATUS_NOT_FOUND}" --color GREEN
else
LogText "Result: found one or more dead or zombie processes"
LogText "Output: PIDs ${FIND}"
Display --indent 2 --text "- Searching for dead/zombie processes" --result "${STATUS_FOUND}" --color RED
ReportSuggestion "${TEST_NO}" "Check the output of ps for dead or zombie processes"
fi
fi
#
#################################################################################
#
# Test : PROC-3614
# Description : Searching for heavy IO based waiting processes
# Notes : Don't perform test on Solaris
if [ ! "${OS}" = "Solaris" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PROC-3614 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check heavy IO waiting based processes"
if [ ${SKIPTEST} -eq 0 ]; then
if [ "${OS}" = "AIX" ]; then
FIND=$(${PSBINARY} -Ae -o pid,stat,comm | ${AWKBINARY} '{ if ($2=="D") print $1 }' | ${XARGSBINARY})
else
FIND=$(${PSBINARY} x -o pid,stat,comm | ${AWKBINARY} '{ if ($2=="D") print $1 }' | ${XARGSBINARY})
fi
if [ -z "${FIND}" ]; then
LogText "Result: No processes were waiting for IO requests to be handled first"
Display --indent 2 --text "- Searching for IO waiting processes" --result "${STATUS_NOT_FOUND}" --color GREEN
else
LogText "Result: found one or more processes which were waiting to get IO requests handled first"
LogText "More info: processes which show up with the status flag 'D' are often stuck, until a disk IO event finished. This can happen for example with network storage, where the connection or protocol settings are not logtext well configured."
LogText "Output: PIDs ${FIND}"
Display --indent 2 --text "- Searching for IO waiting processes" --result "${STATUS_FOUND}" --color RED
ReportSuggestion "${TEST_NO}" "Check process listing for processes waiting for IO requests"
fi
fi
#
#################################################################################
#
# Test : PROC-3802
# Description : Check presence of prelink tooling
Register --test-no PROC-3802 --package-manager-required --os Linux --weight L --network NO --category security --description "Check presence of prelink tooling"
if [ ${SKIPTEST} -eq 0 ]; then
if PackageIsInstalled "prelink"; then
LogText "Result: prelink packages is installed"
# TODO
# - Add item to website with rationale
#ReportSuggestion "${TEST_NO}" "Disable and remove prelinking of binaries"
AddHP 1 3
Display --indent 2 --text "- Search prelink tooling" --result "${STATUS_FOUND}" --color YELLOW
else
Display --indent 2 --text "- Search prelink tooling" --result "${STATUS_NOT_FOUND}" --color GREEN
LogText "Result: prelink package is NOT installed"
AddHP 3 3
fi
fi
#
#################################################################################
#
WaitForKeyPress
#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com
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