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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2013-2016, 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.
#
#################################################################################
#
APPARMORFOUND=0 # Set default for test MACF-6208
MAC_FRAMEWORK_ACTIVE=0 # Default no MAC framework active
RBAC_FRAMEWORK_ACTIVE=0 # Default no RBAC framework active
SELINUXFOUND=0
InsertSection "Security frameworks"
#
#################################################################################
#
# Test : MACF-6204
# Description : Check if AppArmor is installed
Register --test-no MACF-6204 --weight L --network NO --description "Check AppArmor presence"
if [ ${SKIPTEST} -eq 0 ]; then
if [ "${AASTATUSBINARY}" = "" ]; then
APPARMORFOUND=0
LogText "Result: aa-status binary not found, AppArmor not installed"
Display --indent 2 --text "- Checking presence AppArmor" --result "NOT FOUND" --color WHITE
else
APPARMORFOUND=1
LogText "Result: aa-status binary found, AppArmor is installed"
Display --indent 2 --text "- Checking presence AppArmor" --result FOUND --color GREEN
fi
fi
#
#################################################################################
#
# Test : MACF-6208
# Description : Check AppArmor active status
if [ ${APPARMORFOUND} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no MACF-6208 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check if AppArmor is enabled"
if [ ${SKIPTEST} -eq 0 ]; then
if [ ! "${AASTATUSBINARY}" = "" ]; then
# Checking AppArmor status
# 0 if apparmor is enabled and policy is loaded.
# 1 if apparmor is not enabled/loaded.
# 2 if apparmor is enabled but no policy is loaded.
# 3 if control files are not available
# 4 if apparmor status can't be read
FIND=`${AASTATUSBINARY} > /dev/null; echo $?`
if [ ${FIND} -eq 0 ]; then
MAC_FRAMEWORK_ACTIVE=1
LogText "Result: AppArmor is enabled and a policy is loaded"
Display --indent 4 --text "- Checking AppArmor status" --result "ENABLED" --color GREEN
elif [ ${FIND} -eq 4 ]; then
LogText "Result: Can not determine status, most likely due to lacking permissions"
Display --indent 4 --text "- Checking AppArmor status" --result "UNKNOWN" --color RED
elif [ ${FIND} -eq 3 ]; then
LogText "Result: Can not check control files"
Display --indent 4 --text "- Checking AppArmor status" --result "UNKNOWN" --color RED
elif [ ${FIND} -eq 2 ]; then
LogText "Result: AppArmor is enabled, but no policy is loaded"
ReportSuggestion ${TEST_NO} "Disable AppArmor or load a policy"
Display --indent 4 --text "- Checking AppArmor status" --result "NON-ACTIVE" --color GREEN
elif [ ${FIND} -eq 1 ]; then
LogText "Result: AppArmor is disabled"
Display --indent 4 --text "- Checking AppArmor status" --result "DISABLED" --color YELLOW
else
Display --indent 4 --text "- Checking AppArmor status" --result "UNKNOWN" --color RED
ReportException "${TEST_NO}:1" "Invalid or unknown AppArmor status detected"
fi
fi
fi
#
#################################################################################
#
# Test : MACF-6232
# Description : Check SELINUX for installation
Register --test-no MACF-6232 --weight L --network NO --description "Check SELINUX presence"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: checking if we have sestatus binary"
if [ ! "${SESTATUSBINARY}" = "" ]; then
LogText "Result: found sestatus binary (${SESTATUSBINARY})"
Display --indent 2 --text "- Checking presence SELinux" --result "FOUND" --color GREEN
else
LogText "Result: sestatus binary NOT found"
Display --indent 2 --text "- Checking presence SELinux" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : MACF-6234
# Description : Check SELINUX status
if [ ! "${SESTATUSBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no MACF-6234 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check SELINUX status"
if [ ${SKIPTEST} -eq 0 ]; then
# Status: Enabled/Disabled
FIND=`${SESTATUSBINARY} | grep "^SELinux status" | awk '{ print $3 }'`
if [ "${FIND}" = "enabled" ]; then
MAC_FRAMEWORK_ACTIVE=1
LogText "Result: SELinux framework is enabled"
Report "selinux_status=1"
SELINUXFOUND=1
Display --indent 4 --text "- Checking SELinux status" --result "ENABLED" --color GREEN
FIND=`${SESTATUSBINARY} | grep "^Current mode" | awk '{ print $3 }'`
Report "selinux_mode=${FIND}"
FIND2=`${SESTATUSBINARY} | grep "^Mode from config file" | awk '{ print $5 }'`
LogText "Result: current SELinux mode is ${FIND}"
LogText "Result: mode configured in config file is ${FIND2}"
if [ "${FIND}" = "${FIND2}" ]; then
LogText "Result: Current SELinux mode is the same as in config file."
Display --indent 6 --text "- Checking current mode and config file" --result "OK" --color GREEN
else
LogText "Result: Current SELinux mode (${FIND}) is NOT the same as in config file (${FIND2})."
ReportWarning ${TEST_NO} "M" "Current SELinux mode is different from config file (current: ${FIND}, config file: ${FIND2})"
Display --indent 6 --text "- Checking current mode and config file" --result "WARNING" --color RED
fi
Display --indent 8 --text "Current SELinux mode: ${FIND}"
else
LogText "Result: SELinux framework is disabled"
Display --indent 4 --text "- Checking SELinux status" --result "DISABLED" --color YELLOW
fi
fi
#
#################################################################################
#
# Test : RBAC-6272
# Description : Check if grsecurity is installed
# Notes : We already checked grsecurity in osdetection
Register --test-no RBAC-6272 --weight L --network NO --description "Check grsecurity presence"
if [ ${SKIPTEST} -eq 0 ]; then
# Check Linux kernel configuration
if [ ! "${LINUXCONFIGFILE}" = "" -a -f "${LINUXCONFIGFILE}" ]; then
FIND=`${GREPBINARY} ^CONFIG_GRKERNSEC=y ${LINUXCONFIGFILE}`
if [ ! "${FIND}" = "" ]; then
LogText "Result: grsecurity available (in kernel config)"
GRSEC_FOUND=1
else
LogText "Result: no grsecurity found in kernel config"
fi
fi
if [ ${GRSEC_FOUND} -eq 1 ]; then
Display --indent 2 --text "- Checking presence grsecurity" --result FOUND --color GREEN
AddHP 3 3
else
Display --indent 2 --text "- Checking presence grsecurity" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : MACF-6290
# Description : Check if at least one MAC framework is implemented
Register --test-no MACF-6290 --weight L --network NO --description "Check for implemented MAC framework"
if [ ${SKIPTEST} -eq 0 ]; then
if [ ${MAC_FRAMEWORK_ACTIVE} -eq 1 ]; then
Display --indent 2 --text "- Checking for implemented MAC framework" --result OK --color GREEN
AddHP 3 3
LogText "Result: found implemented MAC framework"
else
Display --indent 2 --text "- Checking for implemented MAC framework" --result NONE --color YELLOW
AddHP 2 3
LogText "Result: found no implemented MAC framework"
fi
fi
#
#################################################################################
#
Report "framework_grsecurity=${GRSEC_FOUND}"
Report "framework_selinux=${SELINUXFOUND}"
WaitForKeyPress
#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com
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