unix-privesc-check/lib/misc/binary

#!/bin/sh
# $Revision: 332 $
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
# (c) Tim Brown, 2012
# <mailto:timb@nth-dimension.org.uk>
# <http://www.nth-dimension.org.uk/> / <http://www.machine.org.uk/>
#
# Supports: Linux, AIX, Solaris

if [ -z "${binaryincluded}" ]
then

binaryincluded=1

. lib/misc/dependencies
. lib/misc/validate

binary_list_rpath () {
	filename="${1}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	# skip textual files (bash scripts, python scripts, etc)
	if [ "`file_is_textual \"${filename}\"`" -eq 1 ]
	then
		printf -- ""
	elif [ "`uname`" = "AIX" ]
	then
		dumpflag=0
		dump -Hv -X 32_64 "${filename}" | while read line
		do
			if [ "${dumpflag}" -eq 1 ]
			then
				printf -- "${line}\n" | while read index base member
				do
					if [ "${index}" -eq 0 ]
					then
						printf -- "${base}\n" | tr ":" "\n" | while read filename
						do
							printf -- "${filename}\n"
						done
					fi
				done
			fi
			if [ -n "`printf -- "${line}\n" | grep "INDEX"`" ]
			then
				dumpflag=1
			fi
		done | sort | uniq
	elif [ "`uname`" = "SunOS" ]
	then
		dump -Lv "${filename}" | grep "RPATH" | while read _ header rpath
		do
			printf -- "${rpath}\n" | tr ":" "\n" | while read filename
			do
				printf -- "${filename}\n"
			done
		done | sort | uniq
		dump -Lv "${filename}" | grep "RUNPATH" | while read _ header rpath
		do
			printf -- "${rpath}\n" | tr ":" "\n" | while read filename
			do
				printf -- "${filename}\n"
			done
		done | sort | uniq
	else
		objdump -x "${filename}" | grep -i "RPATH" | while read header rpath
		do
			printf -- "${rpath}\n" | tr ":" "\n" | while read filename
			do
				printf -- "${filename}\n"
			done
		done | sort | uniq
		objdump -x "${filename}" | grep -i "RUNPATH" | while read header rpath
		do
			printf -- "${rpath}\n" | tr ":" "\n" | while read filename
			do
				printf -- "${filename}\n"
			done
		done | sort | uniq
	fi
}

binary_pie() {
	filename="${1}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	# skip textual files (bash scripts, python scripts, etc)
	if [ "`file_is_textual \"${filename}\"`" -eq 1 ]
	then
		printf -- "1\n"
	elif [ "`uname`" = "Linux" ]
	then
		if [ -n "`objdump -x "${filename}" | head -5 | grep "DYNAMIC"`" ]
		then
			printf -- "1\n"
		else
			printf -- "0\n"
		fi
	else
		printf -- "0\n"
	fi
}

binary_relro_full() {
	filename="${1}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	# skip textual files (bash scripts, python scripts, etc)
	if [ "`file_is_textual \"${filename}\"`" -eq 1 ]
	then
		printf -- "1\n"
	elif [ "`uname`" = "Linux" ]
	then
		if [ -n "`objdump -x "${filename}" | grep "BIND_NOW"`" ]
		then
			printf -- "1\n"
		else
			printf -- "0\n"
		fi
	else
		printf -- "0\n"
	fi
}

binary_relro() {
	filename="${1}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	# skip textual files (bash scripts, python scripts, etc)
	if [ "`file_is_textual \"${filename}\"`" -eq 1 ]
	then
		printf -- "1\n"
	elif [ "`uname`" = "Linux" ]
	then
		if [ -n "`objdump -x "${filename}" | head -30 | grep "RELRO"`" ]
		then
			printf -- "1\n"
		else
			printf -- "0\n"
		fi
	else
		printf -- "0\n"
	fi
}

binary_nx() {
	filename="${1}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	# skip textual files (bash scripts, python scripts, etc)
	if [ "`file_is_textual \"${filename}\"`" -eq 1 ]
	then
		printf -- "1\n"
	elif [ "`uname`" = "Linux" ]
	then
		isstackline="0"
		oldifs="${IFS}"
		IFS="\n"
		objdump -x "${filename}" | head -30 | while read line
		do
			if [ "${isstackline}" -eq 1 ]
			then
				if [ -n "`printf -- \"${line}\" | egrep -- \" rw-$\"`" ]
				then
					printf -- "1\n"
				else
					printf -- "0\n"
				fi
				break
			elif [ -n "`printf -- \"${line}\" | grep "STACK "`" ]
			then
				isstackline="1"
			fi
		done
		IFS="${oldifs}"
	else
		printf -- "0\n"
	fi
}

binary_matches_string () {
	filename="${1}"
	pattern="${2}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	[ "`validate_is_string \"${pattern}\"`" ] || false
	if [ -n "`strings \"${filename}\" | egrep -- \"${pattern}\"`" ]
	then
		printf -- "1\n"
	else
		printf -- "0\n"
	fi
}

binary_matches_string_grep () {
	filename="${1}"
	pattern="${2}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	[ "`validate_is_string \"${pattern}\"`" ] || false
	if [ -n "`strings \"${filename}\" | grep -- \"${pattern}\"`" ]
	then
		printf -- "1\n"
	else
		printf -- "0\n"
	fi
}

binary_matches_function () {
	filename="${1}"
	pattern="${2}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	[ "`validate_is_string \"${pattern}\"`" ] || false
	# skip textual files (bash scripts, python scripts, etc)
	if [ "`file_is_textual \"${filename}\"`" -eq 1 ]
	then
		printf -- "0\n"
	elif [ -n "`objdump -T "${filename}" | egrep "${pattern}"`" ]
	then
		printf -- "1\n"
	else
		printf -- "0\n"
	fi
}

binary_banned_api () {
	filename="${1}"
	pattern="${2}"
	[ "`file_is_regular_file \"${filename}\"`" ] || false
	[ "`validate_is_string \"${pattern}\"`" ] || false
	# skip textual files (bash scripts, python scripts, etc)
	if [ "`file_is_textual \"${filename}\"`" -eq 1 ]
	then
		printf -- ""
	else
		printf -- "`objdump -T "${filename}" | egrep -o "${pattern}" | sort -u | xargs | tr " " ","`"
	fi
}

fi