lynis/include/tests_file_integrity

#!/bin/sh

#################################################################################
#
#   Lynis
# ------------------
#
# Copyright 2007-2015, Michael Boelen (michael.boelen@cisofy.com)
# Web site: https://cisofy.com
#
# 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.
#
#################################################################################
#
    CSF_CONFIG="/etc/csf/csf.conf"
    FILE_INT_TOOL=""
    FILE_INT_TOOL_FOUND=0     # Boolean, file integrity tool found
#
#################################################################################
#
    InsertSection "Software: file integrity"
    Display --indent 2 --text "- Checking file integrity tools"
#
#################################################################################
#
    # Test        : FINT-4310
    # Description : Check if AFICK is installed
    Register --test-no FINT-4310 --weight L --network NO --description "AFICK availability"
    if [ ${SKIPTEST} -eq 0 ]; then
        logtext "Test: Checking AFICK binary"
        if [ ! "${AFICKBINARY}" = "" ]; then
            logtext "Result: AFICK is installed (${AFICKBINARY})"
            FILE_INT_TOOL="afick"
            FILE_INT_TOOL_FOUND=1
            Display --indent 4 --text "- AFICK" --result FOUND --color GREEN
          else
            logtext "Result: AFICK is not installed"
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4314
    # Description : Check if AIDE is installed
    Register --test-no FINT-4314 --weight L --network NO --description "AIDE availability"
    if [ ${SKIPTEST} -eq 0 ]; then
        logtext "Test: Checking AIDE binary"
        if [ ! "${AIDEBINARY}" = "" ]; then
            logtext "Result: AIDE is installed (${AIDEBINARY})"
            FILE_INT_TOOL="aide"
            FILE_INT_TOOL_FOUND=1
            Display --indent 4 --text "- AIDE" --result FOUND --color GREEN
          else
            logtext "Result: AIDE is not installed"
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4315
    # Description : Check AIDE configuration file
    if [ ! "${AIDEBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no FINT-4315 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check AIDE configuration file"
    if [ ${SKIPTEST} -eq 0 ]; then
        AIDE_CONFIG_LOCS="/etc /etc/aide /usr/local/etc"
        logtext "Test: search for aide.conf in ${AIDE_CONFIG_LOCS}"
        for I in ${AIDE_CONFIG_LOCS}; do
            if [ -f ${I}/aide.conf ]; then
                 logtext "Result: found aide.conf in directory ${I}"
                 AIDECONFIG="${I}/aide.conf"
            fi
        done
        if [ "${AIDECONFIG}" = "" ]; then
            Display --indent 6 --text "- AIDE config file" --result "NOT FOUND" --color YELLOW
          else
            logtext "Checking configuration file ${AIDECONFIG} for errors"
            FIND=`${AIDEBINARY} --config=${AIDECONFIG} -D; echo $?`
            if [ "${FIND}" = "0" ]; then
                Display --indent 6 --text "- AIDE config file" --result FOUND --color GREEN
              else
                Display --indent 6 --text "- AIDE config file" --result WARNING --color YELLOW
                ReportSuggestion "${TEST_NO}" "Check the AIDE configuratio file as it may contain errors"
            fi
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4316
    # Description : Check if AIDE is configured to use SHA256 or SHA512 checksums
    if [ ! "${AIDEBINARY}" = "" -a ! "${AIDECONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no FINT-4316 --preqs-met ${PREQS_MET} --weight L --network NO --description "AIDE configuration: Checksums (SHA256 or SHA512)"
    if [ ${SKIPTEST} -eq 0 ]; then
        FIND=`${GREPBINARY} "^Checksums" ${AIDECONFIG}`
        FIND2=`${GREPBINARY} "^Checksums" ${AIDECONFIG} | ${EGREPBINARY} "sha256|sha512"`
        if [ "${FIND}" = "" ]; then
            logtext "Result: Unclear how AIDE is dealing with checksums"
            Display --indent 6 --text "- AIDE config (Checksums)" --result UNKNOWN --color YELLOW
          else
            if [ "${FIND2}" = "" ]; then
                logtext "Result: No SHA256 or SHA512 found for creating checksums"
                Display --indent 6 --text "- AIDE config (Checksum)" --result WARNING --color RED
                ReportSuggestion ${TEST_NO} "Use SHA256 or SHA512 to create checksums in AIDE"
                AddHP 1 3
              else
                logtext "Result: Found SHA256 or SHA512 found for creating checksums"
                Display --indent 6 --text "- AIDE config (Checksum)" --result OK --color GREEN
                AddHP 2 2
            fi
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4318
    # Description : Check if Osiris is installed
    Register --test-no FINT-4318 --weight L --network NO --description "Osiris availability"
    if [ ${SKIPTEST} -eq 0 ]; then
        logtext "Test: Checking Osiris binary"
        if [ ! "${OSIRISBINARY}" = "" ]; then
            logtext "Result: Osiris is installed (${OSIRISBINARY})"
            FILE_INT_TOOL="osiris"
            FILE_INT_TOOL_FOUND=1
            Display --indent 4 --text "- Osiris" --result FOUND --color GREEN
          else
            logtext "Result: Osiris is not installed"
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4322
    # Description : Check if Samhain is installed
    Register --test-no FINT-4322 --weight L --network NO --description "Samhain availability"
    if [ ${SKIPTEST} -eq 0 ]; then
        logtext "Test: Checking Samhain binary"
        if [ ! "${SAMHAINBINARY}" = "" ]; then
            logtext "Result: Samhain is installed (${SAMHAINBINARY})"
            FILE_INT_TOOL="samhain"
            FILE_INT_TOOL_FOUND=1
            Display --indent 4 --text "- Samhain" --result FOUND --color GREEN
          else
            logtext "Result: Samhain is not installed"
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4326
    # Description : Check if Tripwire is installed
    Register --test-no FINT-4326 --weight L --network NO --description "Tripwire availability"
    if [ ${SKIPTEST} -eq 0 ]; then
        logtext "Test: Checking Tripwire binary"
        if [ ! "${TRIPWIREBINARY}" = "" ]; then
            logtext "Result: Tripwire is installed (${TRIPWIREBINARY})"
            FILE_INT_TOOL="tripwire"
            FILE_INT_TOOL_FOUND=1
            Display --indent 4 --text "- Tripwire" --result FOUND --color GREEN
          else
            logtext "Result: Tripwire is not installed"
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4328
    # Description : Check if OSSEC system integrity tool is running
    Register --test-no FINT-4328 --weight L --network NO --description "OSSEC syscheck daemon running"
    if [ ${SKIPTEST} -eq 0 ]; then
        logtext "Test: Checking if OSSEC syscheck daemon is running"
        IsRunning ossec-syscheckd
        if [ ${RUNNING} -eq 1 ]; then
            logtext "Result: syscheck (OSSEC) installed"
            FILE_INT_TOOL="ossec-syscheck"
            FILE_INT_TOOL_FOUND=1
            Display --indent 4 --text "- OSSEC (syscheck)" --result FOUND --color GREEN
          else
            logtext "Result: syscheck (OSSEC) not installed"
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4330
    # Description : Check if mtree is installed
    # Note        : Usually on BSD and similar
    Register --test-no FINT-4330 --weight L --network NO --description "mtree availability"
    if [ ${SKIPTEST} -eq 0 ]; then
        logtext "Test: Checking mtree binary"
        if [ ! "${MTREEBINARY}" = "" ]; then
            logtext "Result: mtree is installed (${MTREEBINARY})"
            FILE_INT_TOOL="mtree"
            FILE_INT_TOOL_FOUND=1
            Display --indent 4 --text "- mtree" --result FOUND --color GREEN
          else
            logtext "Result: mtree is not installed"
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4334
    # Description : Check if LFD is used (part of CSF suite)
    if [ -f ${CSF_CONFIG} ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no FINT-4334 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check lfd daemon status"
    if [ ${SKIPTEST} -eq 0 ]; then
        Display --indent 4 --text "- lfd (CSF)" --result FOUND --color GREEN
        IsRunning 'lfd '
        if [ ${RUNNING} -eq 1 ]; then
            logtext "Result: lfd daemon is running (CSF)"
            Display --indent 6 --text "- Daemon status" --result RUNNING --color GREEN
            FILE_INT_TOOL="csf-lfd"
            FILE_INT_TOOL_FOUND=1
          else
            Display --indent 6 --text "- Daemon status" --result "NOT RUNNING" --color YELLOW
        fi
    fi
    # Test        : FINT-4336
    # Description : Check if LFD is enabled (part of CSF suite)
    if [ -f ${CSF_CONFIG} ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no FINT-4336 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check lfd configuration status"
    if [ ${SKIPTEST} -eq 0 ]; then
        # LFD configuration parameters
        ENABLED=`grep "^LF_DAEMON = \"1\"" ${CSF_CONFIG}`
        if [ ! "${ENABLED}" = "" ]; then
            logtext "Result: lfd service is configured to run"
            Display --indent 6 --text "- Configuration status" --result ENABLED --color GREEN
          else
            logtext "Result: lfd service is configured NOT to run"
            Display --indent 6 --text "- Configuration status" --result DISABLED --color YELLOW
        fi
        ENABLED=`grep "^LF_DIRWATCH =" ${CSF_CONFIG} | awk '{ print $3 }' | sed 's/\"//g'`
        if [ ! "${ENABLED}" = "0" -a ! "${ENABLED}" = "" ]; then
            logtext "Result: lfd directory watching is enabled (value: ${ENABLED})"
            Display --indent 6 --text "- Temporary directory watches" --result ENABLED --color GREEN
          else
            logtext "Result: lfd directory watching is disabled"
            Display --indent 6 --text "- Temporary directory watches" --result DISABLED --color YELLOW
        fi
        ENABLED=`grep "^LF_DIRWATCH_FILE =" ${CSF_CONFIG} | awk '{ print $3 }' | sed 's/\"//g'`
        if [ ! "${ENABLED}" = "0" -a ! "${ENABLED}" = "" ]; then
            Display --indent 6 --text "- Directory/File watches" --result ENABLED --color GREEN
          else
            Display --indent 6 --text "- Directory/File watches" --result DISABLED --color YELLOW
        fi
    fi
#
#################################################################################
#
    # Test        : FINT-4350
    # Description : Check if at least one file integrity tool is installed
    Register --test-no FINT-4350 --weight L --network NO --description "File integrity software installed"
    if [ ${SKIPTEST} -eq 0 ]; then
        logtext "Test: Check if at least on file integrity tool is available/installed"
        if [ ${FILE_INT_TOOL_FOUND} -eq 1 ]; then
            logtext "Result: found at least one file integrity tool"
            Display --indent 2 --text "- Checking presence integrity tool" --result FOUND --color GREEN
            AddHP 5 5
          else
            logtext "Result: No file integrity tools found"
            Display --indent 2 --text "- Checking presence integrity tool" --result "NOT FOUND" --color YELLOW
            ReportSuggestion ${TEST_NO} "Install a file integrity tool to monitor changes to critical and sensitive files"
            AddHP 0 5
        fi
    fi
#
#################################################################################
#

report "file_integrity_tool=${FILE_INT_TOOL}"
report "file_integrity_tool_installed=${FILE_INT_TOOL_FOUND}"
wait_for_keypress

#
#================================================================================
# Lynis - Copyright 2007-2015 Michael Boelen, CISOfy - https://cisofy.com