lynis/include/tests_hardening

#!/bin/sh

#################################################################################
#
#   Lynis
# ------------------
#
# Copyright 2007-2014, 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.
#
#################################################################################
#
    InsertSection "Hardening"

    # COMPILER_INSTALLED is initialised before
    HARDEN_COMPILERS_NEEDED=0
#
#################################################################################
#
    # Test        : HRDN-7220
    # Description : Check for installed compilers
    Register --test-no HRDN-7220 --weight L --network NO --description "Check if one or more compilers are installed"
    if [ ${SKIPTEST} -eq 0 ]; then
	logtext "Test: Check if one or more compilers can be found on the system"
	if [ ${COMPILER_INSTALLED} -eq 0 ]; then
	    logtext "Result: no compilers found"
	    Display --indent 4 --text "- Installed compiler(s)..." --result "NOT FOUND" --color GREEN
	    AddHP 3 3
	  else
	    logtext "Result: found installed compiler. See top of logfile which compilers have been found or use grep to filter on 'compiler'"
	    Display --indent 4 --text "- Installed compiler(s)..." --result "FOUND" --color RED
	    ReportSuggestion ${TEST_NO} "Harden the system by removing unneeded compilers. This can decrease the chance of customized trojans, backdoors and rootkits to be compiled and installed"
	    AddHP 1 3
	fi
    fi
#
#################################################################################
#
    # Test        : HRDN-7222
    # Description : Check for permissions of installed compilers
    Register --test-no HRDN-7222 --weight L --network NO --description "Check compiler permissions"
    if [ ${SKIPTEST} -eq 0 ]; then
	logtext "Test: Check if one or more compilers can be found on the system"
	HARDEN_COMPILERS_NEEDED=0
	if [ ${COMPILER_INSTALLED} -eq 0 ]; then
	    logtext "Result: no compilers found"
	  else
	    # as
	    if [ ! "${ASBINARY}" = "" ]; then
		logtext "Test: Check file permissions for as (Assembler)"
		IsWorldExecutable ${ASBINARY}
		if [ ${SYMLINK} -eq 0 ]; then
		    logtext "Binary: ${ASBINARY} (world executable: ${FileIsWorldExecutable})"
		  else
		    logtext "Binary: ${GCCBINARY} (symlinked to: ${sFILE}) (world executable: ${FileIsWorldExecutable})"
		fi  
                if [ ${FileIsWorldExecutable} = "TRUE" ]; then
                    AddHP 2 3
                    HARDEN_COMPILERS_NEEDED=1
                  else
                    AddHP 3 3
                fi
	    fi
	    # gcc
	    if [ ! "${GCCBINARY}" = "" ]; then
		logtext "Test: Check file permissions for GCC compiler"
		IsWorldExecutable ${GCCBINARY}
		if [ ${SYMLINK} -eq 0 ]; then
		    logtext "Binary: ${GCCBINARY} (world executable: ${FileIsWorldExecutable})"
		  else
		    logtext "Binary: ${GCCBINARY} (symlinked to: ${sFILE}) (world executable: ${FileIsWorldExecutable})"
		fi  
                if [ ${FileIsWorldExecutable} = "TRUE" ]; then
                    AddHP 2 3
                    HARDEN_COMPILERS_NEEDED=1
                  else
                    AddHP 3 3
                fi
	    fi
	    # Report suggestion is one or more compilers can be better hardened
	    if [ ${HARDEN_COMPILERS_NEEDED} -eq 1 ]; then
	        logtext "Result: at least one compiler could be better hardened by restricting executable access to root or group only"
		ReportSuggestion ${TEST_NO} "Harden compilers and restrict access to world"
	    fi

	    #YYY check if compilers have a specific group (like compiler, or NOT root/wheel)
#	    Display --indent 4 --text "- Installed compiler(s)..." --result "FOUND" --color RED
	    # /usr/bin/*cc*
	    # /usr/bin/*++*
	    # /usr/bin/ld
	    # (and 700 or 750 permissions)
	fi
    fi
#
#################################################################################
#
    # Test        : HRDN-7230
    # Description : Check for installed malware scanners
    Register --test-no HRDN-7230 --weight L --network NO --description "Check for malware scanner"
    if [ ${SKIPTEST} -eq 0 ]; then
	logtext "Test: Check if one or more compilers can be found on the system"
	if [ ${MALWARE_SCANNER_INSTALLED} -eq 1 ]; then
	    logtext "Result: found at least one malware scanner"
	    Display --indent 4 --text "- Installed malware scanner..." --result "FOUND" --color GREEN
	    AddHP 3 3
	  else
	    logtext "Result: no malware scanner found"
	    Display --indent 4 --text "- Installed malware scanner..." --result "NOT FOUND" --color RED
	    ReportSuggestion ${TEST_NO} "Harden the system by installing one or malware scanners to perform periodic file system scans"
	    AddHP 1 3
	fi
    fi
#
#################################################################################
#
            
#    logtext "--------------------------------------------------------------------"
#    logtext "| System part                        | Preferred value | Actual value | Points |"
#    logtext "| [!] Compiler installed               |              0  | [${COMPILER_INSTALLED}]     | x  |"
#    logtext "| [V] Malware scanner installed        |              1  | [x]     | x  |"
#    logtext "| [V] Packet filter enabled            |              1  | [x]     | x  |"
#    logtext "--------------------------------------------------------------------"
#    logtext "| [!]: Hardening possible,  [V]: Hardening performed,  [ ]: Unknown "
#    logtext "--------------------------------------------------------------------"

    
#
#################################################################################
#

report "compiler_installed=${COMPILER_INSTALLED}"
wait_for_keypress

#
#================================================================================
# Lynis - Copyright 2007-2014, Michael Boelen - www.rootkit.nl - The Netherlands