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checksec
executable file
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checksec
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#!/usr/bin/env bash
# Do not edit this file directly, this file is generated from the files
# in the src directory. Any updates to this file will be overwritten when generated
# sanitize the environment before run
[ "$(env | /bin/sed -r -e '/^(PWD|SHLVL|_)=/d')" ] && exec -c "$0" "$@"
# --- Modified Version ---
# Name : checksec.sh
# Version : 1.7.0
# Author : Brian Davis
# Date : Feburary 2014
# Download: https://github.com/slimm609/checksec.sh
#
# --- Modified Version ---
# Name : checksec.sh
# Version : based on 1.5
# Author : Robin David
# Date : October 2013
# Download: https://github.com/RobinDavid/checksec
#
# --- Original version ---
# Name : checksec.sh
# Version : 1.5
# Author : Tobias Klein
# Date : November 2011
# Download: http://www.trapkit.de/tools/checksec.html
# Changes : http://www.trapkit.de/tools/checksec_changes.txt
# The BSD License (http://www.opensource.org/licenses/bsd-license.php)
# specifies the terms and conditions of use for checksec.sh:
# Copyright (c) 2014-2015, Brian Davis
# Copyright (c) 2013, Robin David
# Copyright (c) 2009-2011, Tobias Klein
# All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Tobias Klein nor the name of trapkit.de may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
# DAMAGE.
# set global lang to C
export LC_ALL="C"
# version
SCRIPT_VERSION=2021101001
SCRIPT_MAJOR=2
SCRIPT_MINOR=5
SCRIPT_REVISION=0
# global vars
debug=false
verbose=false
format="cli"
SCRIPT_NAME="checksec"
SCRIPT_URL="https://github.com/slimm609/checksec.sh/raw/master/${SCRIPT_NAME}"
SIG_URL="https://github.com/slimm609/checksec.sh/raw/master/$(basename ${SCRIPT_NAME} .sh).sig"
pkg_release=false
commandsmissing=false
OPT=0
extended_checks=false
# FORTIFY_SOURCE vars
FS_end=_chk
FS_cnt_total=0
FS_cnt_checked=0
FS_cnt_unchecked=0
FS_libc=0
if [[ $(id -u) != 0 ]]; then
export PATH=${PATH}:/sbin/:/usr/sbin/
fi
# check if directory exists
dir_exists() {
if [[ -d "${1}" ]]; then
return 0
else
return 1
fi
}
# check user privileges
root_privs() {
if [[ $(/usr/bin/id -u) -eq 0 ]]; then
return 0
else
return 1
fi
}
# check for required files and deps first
# check if command exists
command_exists() {
type "${1}" > /dev/null 2>&1
}
for command in cat awk sed sysctl uname mktemp openssl grep stat file find sort head ps readlink basename id which xargs; do
if ! (command_exists ${command}); then
echo >&2 -e "\e[31mWARNING: '${command}' not found! It's required for most checks.\e[0m"
commandsmissing=true
fi
done
if [[ ${commandsmissing} == true ]]; then
echo >&2 -e "\n\e[31mWARNING: Not all necessary commands found. Some tests might not work!\e[0m\n"
sleep 2
fi
if (command_exists readelf); then
readelf="readelf -W"
elif (command_exists eu-readelf); then
readelf="eu-readelf -W"
elif (command_exists greadelf); then
readelf="greadelf -W"
else
echo -e "\n\e[31mERROR: readelf is a required tool for almost all tests. Aborting...\e[0m\n"
exit
fi
sysarch=$(uname -m)
if [[ "${sysarch}" == "x86_64" ]]; then
arch="64"
elif [[ "${sysarch}" == "i?86" ]]; then
arch="32"
elif [[ "${sysarch}" =~ "arm" ]]; then
arch="arm"
elif [[ "${sysarch}" =~ "aarch64" ]]; then
arch="aarch64"
fi
# check for system-wide ASLR support
aslrcheck() {
# PaX ASLR support
if ! (grep -q 'Name:' /proc/1/status 2> /dev/null); then
echo_message '\033[33m insufficient privileges for PaX ASLR checks\033[m\n' '' '' ''
echo_message ' Fallback to standard Linux ASLR check' '' '' ''
fi
if grep -q 'PaX:' /proc/1/status 2> /dev/null; then
if grep -q 'PaX:' /proc/1/status 2> /dev/null | grep -q 'R'; then
echo_message '\033[32mPaX ASLR enabled\033[m\n\n' '' '' ''
else
echo_message '\033[31mPaX ASLR disabled\033[m\n\n' '' '' ''
fi
else
# standard Linux 'kernel.randomize_va_space' ASLR support
# (see the kernel file 'Documentation/sysctl/kernel.txt' for a detailed description)
echo_message " (kernel.randomize_va_space): " '' '' ''
if sysctl -a 2> /dev/null | grep -q 'kernel.randomize_va_space = 1'; then
echo_message '\033[33mPartial (Setting: 1)\033[m\n\n' '' '' ''
echo_message " Description - Make the addresses of mmap base, stack and VDSO page randomized.\n" '' '' ''
echo_message " This, among other things, implies that shared libraries will be loaded to \n" '' '' ''
echo_message " random addresses. Also for PIE-linked binaries, the location of code start\n" '' '' ''
echo_message " is randomized. Heap addresses are *not* randomized.\n\n" '' '' ''
elif sysctl -a 2> /dev/null | grep -q 'kernel.randomize_va_space = 2'; then
echo_message '\033[32mFull (Setting: 2)\033[m\n\n' '' '' ''
echo_message " Description - Make the addresses of mmap base, heap, stack and VDSO page randomized.\n" '' '' ''
echo_message " This, among other things, implies that shared libraries will be loaded to random \n" '' '' ''
echo_message " addresses. Also for PIE-linked binaries, the location of code start is randomized.\n\n" '' '' ''
elif sysctl -a 2> /dev/null | grep -q 'kernel.randomize_va_space = 0'; then
echo_message '\033[31mNone (Setting: 0)\033[m\n' '' '' ''
else
echo_message '\033[31mNot supported\033[m\n' '' '' ''
fi
echo_message " See the kernel file 'Documentation/sysctl/kernel.txt' for more details.\n\n" '' '' ''
fi
}
chk_dir() {
if [[ -z "${CHK_DIR}" ]]; then
printf "\033[31mError: Please provide a valid directory.\033[m\n\n"
exit 1
fi
# follow symlink
if [[ -L "${CHK_DIR}" ]]; then
CHK_DIR=$(readlink -f "${CHK_DIR}")
fi
# remove trailing slashes
tempdir=$(echo "${CHK_DIR}" | sed -e "s/\/*$//")
if [[ ! -d "${tempdir}" ]]; then
printf "\033[31mError: The directory '%s' does not exist.\033[m\n\n" "${tempdir}"
exit 1
fi
if ${extended_checks}; then
echo_message "RELRO STACK CANARY NX PIE SELFRANDO Clang CFI SafeStack RPATH RUNPATH Symbols \tFORTIFY\tFortified\tFortifiable Filename\n" '' "<dir name='$tempdir'>\n" "{ \"dir\": { \"name\":\"$tempdir\" }"
else
echo_message "RELRO STACK CANARY NX PIE RPATH RUNPATH Symbols \tFORTIFY\tFortified\tFortifiable Filename\n" '' "<dir name='$tempdir'>\n" "{ \"dir\": { \"name\":\"$tempdir\" }"
fi
fdircount=0
fdirtotal=0
while read -r N; do
if [[ "${N}" != "[A-Za-z1-0]*" ]]; then
out=$(file "$(readlink -f "${N}")")
if [[ ${out} =~ ELF ]]; then
((fdirtotal++))
fi
fi
done < <(find "${tempdir}" -type f 2> /dev/null)
if [[ $fdirtotal -gt 0 ]]; then
echo_message "" "" "" ","
fi
while read -r N; do
if [[ "${N}" != "[A-Za-z1-0]*" ]]; then
# read permissions?
if [[ ! -r "${N}" ]]; then
printf "\033[31mError: No read permissions for '%s' (run as root).\033[m\n" ", ${N}"
else
# ELF executable?
out=$(file "$(readlink -f "${N}")")
if [[ ! ${out} =~ ELF ]]; then
if [[ "${verbose}" = "true" ]]; then
echo_message "\033[34m*** Not an ELF file: ${tempdir}/" "" "" ""
file "${N}"
echo_message "\033[m" "" "" ""
fi
else
((fdircount++))
echo_message "" "" " " ""
filecheck "${N}"
if [[ "$(find "${N}" \( -perm -004000 -o -perm -002000 \) -type f -print)" ]]; then
echo_message "\033[37;41m${N}\033[m\n" ",${N}\n" " filename='${N}' />\n" ", \"filename\":\"${N}\"}"
else
echo_message "${N}\n" ",${N}\n" " filename='${N}' />\n" ", \"filename\":\"${N}\"}"
fi
if [[ "${fdircount}" == "${fdirtotal}" ]]; then
echo_message "" "" "" ""
else
echo_message "" "" "" ","
fi
fi
fi
fi
done < <(find "${tempdir}" -type f 2> /dev/null)
echo_message "" "" "</dir>\n" "}"
}
chk_file() {
if [[ -z "${CHK_FILE}" ]]; then
printf "\033[31mError: Please provide a valid file.\033[m\n\n"
exit 1
fi
# does the file exist?
if [[ ! -e "${CHK_FILE}" ]]; then
printf "\033[31mError: The file '%s' does not exist.\033[m\n\n" "${CHK_FILE}"
exit 1
fi
# read permissions?
if [[ ! -r "${CHK_FILE}" ]]; then
printf "\033[31mError: No read permissions for '%s' (run as root).\033[m\n\n" "${CHK_FILE}"
exit 1
fi
# ELF executable?
out=$(file "$(readlink -f "${CHK_FILE}")")
if [[ ! ${out} =~ ELF ]]; then
printf "\033[31mError: Not an ELF file: "
file "${CHK_FILE}"
printf "\033[m\n"
exit 1
fi
if ${extended_checks}; then
echo_message "RELRO STACK CANARY NX PIE SELFRANDO Clang CFI SafeStack RPATH RUNPATH\tSymbols\t\tFORTIFY\tFortified\tFortifiable\tFILE\n" '' '' '{'
else
echo_message "RELRO STACK CANARY NX PIE RPATH RUNPATH\tSymbols\t\tFORTIFY\tFortified\tFortifiable\tFILE\n" '' '' '{'
fi
filecheck "${CHK_FILE}"
if [[ "$(find "${CHK_FILE}" \( -perm -004000 -o -perm -002000 \) -type f -print)" ]]; then
echo_message "\033[37;41m${CHK_FILE}\033[m\n" ",${CHK_FILE}\n" " filename='${CHK_FILE}'/>\n" " } }"
else
echo_message "${CHK_FILE}\n" ",${CHK_FILE}\n" " filename='${CHK_FILE}'/>\n" " } }"
fi
}
chk_file_list() {
if ${extended_checks}; then
echo_message "RELRO STACK CANARY NX PIE SELFRANDO Clang CFI SafeStack RPATH RUNPATH\tSymbols\t\tFORTIFY\tFortified\tFortifiable\tFILE\n" '' '' '{\n'
else
echo_message "RELRO STACK CANARY NX PIE RPATH RUNPATH\tSymbols\t\tFORTIFY\tFortified\tFortifiable\tFILE\n" '' '' '{\n'
fi
while IFS="" read -r p || [[ -n "${p}" ]]; do
CHK_FILE="${p}"
if [[ -z "${CHK_FILE}" ]]; then
printf "\033[31mError: Please provide a valid file.\033[m\n\n"
exit 1
fi
# does the file exist?
if [[ ! -e "${CHK_FILE}" ]]; then
printf "\033[31mError: The file '%s' does not exist.\033[m\n\n" "${CHK_FILE}"
exit 1
fi
# read permissions?
if [[ ! -r "${CHK_FILE}" ]]; then
printf "\033[31mError: No read permissions for '%s' (run as root).\033[m\n\n" "${CHK_FILE}"
exit 1
fi
# ELF executable?
out=$(file "$(readlink -f "${CHK_FILE}")")
if [[ ! ${out} =~ ELF ]]; then
printf "\033[31mError: Not an ELF file: "
file "${CHK_FILE}"
printf "\033[m\n"
exit 1
fi
filecheck "${CHK_FILE}"
if [[ "$(find "${CHK_FILE}" \( -perm -004000 -o -perm -002000 \) -type f -print)" ]]; then
echo_message "\033[37;41m${CHK_FILE}\033[m\n" ",${CHK_FILE}\n" " filename='${CHK_FILE}'/>\n" " } }"
else
echo_message "${CHK_FILE}\n" ",${CHK_FILE}\n" " filename='${CHK_FILE}'/>\n" " },\n"
fi
done < "${CHK_FILE_LIST}"
echo_message '' '' '' ' }\n'
}
chk_fortify_file() {
# if first char of pathname is '~' replace it with '${HOME}'
if [[ "${CHK_FORTIFY_FILE:0:1}" = '~' ]]; then
CHK_FORTIFY_FILE=${HOME}/${CHK_FORTIFY_FILE:1}
fi
if [[ -z "${CHK_FORTIFY_FILE}" ]]; then
printf "\033[31mError: Please provide a valid file.\033[m\n\n"
exit 1
fi
# does the file exist?
if [[ ! -f "${CHK_FORTIFY_FILE}" ]]; then
printf "\033[31mError: The file '%s' does not exist.\033[m\n\n" "${CHK_FORTIFY_FILE}"
exit 1
fi
# read permissions?
if [[ ! -r "${CHK_FORTIFY_FILE}" ]]; then
printf "\033[31mError: No read permissions for '%s' (run as root).\033[m\n\n" "${CHK_FORTIFY_FILE}"
exit 1
fi
# ELF executable?
out=$(file "$(readlink -f "${CHK_FORTIFY_FILE}")")
if [[ ! ${out} =~ ELF ]]; then
printf "\033[31mError: Not an ELF file: "
file "${CHK_FORTIFY_FILE}"
printf "\033[m\n"
exit 1
fi
if [[ -e /lib/libc.so.6 ]]; then
FS_libc=/lib/libc.so.6
elif [[ -e /lib64/libc.so.6 ]]; then
FS_libc=/lib64/libc.so.6
elif [[ -e /lib/i386-linux-gnu/libc.so.6 ]]; then
FS_libc=/lib/i386-linux-gnu/libc.so.6
elif [[ -e /lib/x86_64-linux-gnu/libc.so.6 ]]; then
FS_libc=/lib/x86_64-linux-gnu/libc.so.6
elif [[ -e /lib/arm-linux-gnueabihf/libc.so.6 ]]; then
FS_libc=/lib/arm-linux-gnueabihf/libc.so.6
elif [[ -e /lib/aarch64-linux-gnu/libc.so.6 ]]; then
FS_libc=/lib/aarch64-linux-gnu/libc.so.6
else
printf "\033[31mError: libc not found.\033[m\n\n"
exit 1
fi
FS_chk_func_libc=()
FS_functions=()
while IFS='' read -r line; do FS_chk_func_libc+=("$line"); done < <(${readelf} -s ${FS_libc} 2> /dev/null | grep _chk@@ | awk '{ print $8 }' | cut -c 3- | sed -e 's/_chk@.*//')
while IFS='' read -r line; do FS_functions+=("$line"); done < <(${readelf} -s "${CHK_FORTIFY_FILE}" 2> /dev/null | awk '{ print $8 }' | sed 's/_*//' | sed -e 's/@.*//')
echo_message "" "" "<fortify-test name='${CHK_FORTIFY_FILE}' " "{ \"fortify-test\": { \"name\":\"${CHK_FORTIFY_FILE}\" "
FS_libc_check
FS_binary_check
FS_comparison
FS_summary
echo_message "" "" "</fortify-test>\n" "} }"
}
chk_fortify_proc() {
if [[ -z "${CHK_FORTIFY_PROC}" ]]; then
printf "\033[31mError: Please provide a valid process ID.\033[m\n\n"
exit 1
fi
if ! (isNumeric "${CHK_FORTIFY_PROC}"); then
printf "\033[31mError: Please provide a valid process ID.\033[m\n\n"
exit 1
fi
cd /proc || exit
N=${CHK_FORTIFY_PROC}
if [[ -d "${N}" ]]; then
# read permissions?
if [[ ! -r "${N}/exe" ]]; then
if ! (root_privs); then
printf "\033[31mNo read permissions for '/proc/%s/exe' (run as root).\033[m\n\n" "${N}"
exit 1
fi
if [[ ! "$(readlink "${N}/exe")" ]]; then
printf "\033[31mPermission denied. Requested process ID belongs to a kernel thread.\033[m\n\n"
exit 1
fi
exit 1
fi
if [[ -e /lib/libc.so.6 ]]; then
FS_libc=/lib/libc.so.6
elif [[ -e /lib64/libc.so.6 ]]; then
FS_libc=/lib64/libc.so.6
elif [[ -e /lib/i386-linux-gnu/libc.so.6 ]]; then
FS_libc=/lib/i386-linux-gnu/libc.so.6
elif [[ -e /lib/x86_64-linux-gnu/libc.so.6 ]]; then
FS_libc=/lib/x86_64-linux-gnu/libc.so.6
else
printf "\033[31mError: libc not found.\033[m\n\n"
exit 1
fi
name=$(head -1 "${N}/status" | cut -b 7-)
echo_message "* Process name (PID) : ${name} (${N})\n" "" "" ""
FS_chk_func_libc=()
FS_functions=()
while IFS='' read -r line; do FS_chk_func_libc+=("$line"); done < <(${readelf} -s $FS_libc 2> /dev/null | grep _chk@@ | awk '{ print $8 }' | cut -c 3- | sed -e 's/_chk@.*//')
while IFS='' read -r line; do FS_functions+=("$line"); done < <(${readelf} -s "${CHK_FORTIFY_PROC}/exe" 2> /dev/null | awk '{ print $8 }' | sed 's/_*//' | sed -e 's/@.*//')
echo_message "" "" "<fortify-test name='${name}' pid='${N}' " "{ \"fortify-test\": { \"name\":\"${name}\", \"pid\":\"${N}\" "
FS_libc_check
FS_binary_check
FS_comparison
FS_summary
echo_message "" "" "</fortify-test>\n" "} }"
fi
}
chk_proc_all() {
cd /proc || exit
echo_message "* System-wide ASLR" "" "" ""
aslrcheck
echo_message "* Does the CPU support NX: " "" "<procs>" ""
nxcheck
echo_message "* Core-Dumps access to all users: " "" "" ""
coredumpcheck
if ${extended_checks}; then
echo_message " COMMAND PID RELRO STACK CANARY Clang CFI SafeStack SECCOMP NX/PaX PIE SELFRANDO FORTIFY\n" "" "" '{'
else
echo_message " COMMAND PID RELRO STACK CANARY SECCOMP NX/PaX PIE FORTIFY\n" "" "" '{'
fi
lastpid=0
currpid=0
for N in [1-9]*; do
if [[ "${N}" != "$$" ]] && readlink -q "${N}"/exe > /dev/null; then
((lastpid++))
fi
done
for N in [1-9]*; do
if [[ "${N}" != "$$" ]] && readlink -q "${N}"/exe > /dev/null; then
((currpid++))
name=$(head -1 "${N}"/status | cut -b 7-)
if [[ $format == "cli" ]]; then
printf "%16s" "${name}"
printf "%7d " "${N}"
else
echo_message "" "${N}," " <proc pid='${N}'" " \"${N}\": { "
echo_message "" "${name}," " name='${name}'" "\"name\":\"${name}\","
fi
proccheck "${N}"
if [[ "${lastpid}" == "${currpid}" ]]; then
echo_message "\n" "\n" "</proc>\n" ""
else
echo_message "\n" "\n" "</proc>\n" ","
fi
fi
done
echo_message "" "" "</procs>" " }\n"
if [[ ! -e /usr/bin/id ]]; then
echo_message "\n\033[33mNote: If you are running 'checksec.sh' as an unprivileged user, you\n" "" "" ""
echo_message " will not see all processes. Please run the script as root.\033[m\n\n" "" "" "\n"
else
if ! (root_privs); then
echo_message "\n\033[33mNote: You are running 'checksec.sh' as an unprivileged user.\n" "" "" ""
echo_message " Too see all processes, please run the script as root.\033[m\n\n" "" "" "\n"
fi
fi
}
chk_proc() {
if [[ -z "${CHK_PROC}" ]]; then
printf "\033[31mError: Please provide a valid process name.\033[m\n\n"
exit 1
fi
cd /proc || exit
if (isString "${CHK_PROC}"); then
IFS=" " read -r -a fpids <<< "$(pgrep -d ' ' "${CHK_PROC}")"
elif (isNumeric "${CHK_PROC}"); then
fpids=("${CHK_PROC}")
else
printf "\033[31mError: Please provide a valid process name or pid.\033[m\n\n"
exit 1
fi
if [[ ${#fpids} -eq 0 ]]; then
printf "\033[31mError: No process with the given name or pid found.\033[m\n\n"
exit 1
fi
echo_message "* System-wide ASLR" '' '' ''
aslrcheck
echo_message "* Does the CPU support NX: " '' '' ''
nxcheck
if ${extended_checks}; then
echo_message " COMMAND PID RELRO STACK CANARY Clang CFI SafeStack SECCOMP NX/PaX PIE SELFRANDO FORTIFY\n" "" "" '{'
else
echo_message " COMMAND PID RELRO STACK CANARY SECCOMP NX/PaX PIE FORTIFY\n" "" "" '{'
fi
pos=$((${#fpids[*]} - 1))
last=${fpids[$pos]}
for N in "${fpids[@]}"; do
if [[ -d "${N}" ]]; then
name=$(head -1 "${N}"/status | cut -b 7-)
if [[ $format == "cli" ]]; then
printf "%16s" "${name}"
printf "%7d " "${N}"
else
echo_message "" "${N}," "<proc pid='${N}'" " \"${N}\": {"
echo_message "" "${name}," " name='${name}'" "\"name\":\"${name}\","
fi
if [[ ! -r "${N}/exe" ]]; then
if ! (root_privs); then
printf "\033[31mNo read permissions for '/proc/%s/exe' (run as root).\033[m\n\n" "${N}"
exit 1
fi
if [[ ! "$(readlink "${N}/exe")" ]]; then
printf "\033[31mPermission denied. Requested process ID belongs to a kernel thread.\033[m\n\n"
exit 1
fi
exit 1
fi
proccheck "${N}"
if [[ "${N}" == "$last" ]]; then
echo_message "\n" "\n" "</proc>\n" ""
else
echo_message "\n" "\n" "</proc>\n" ","
fi
fi
done
echo_message "\n" "\n" "\n" "}\n"
}
chk_proc_libs() {
if [[ -z "${CHK_PROC_LIBS}" ]]; then
printf "\033[31mError: Please provide a valid process ID.\033[m\n\n"
exit 1
fi
if ! (isNumeric "${CHK_PROC_LIBS}"); then
printf "\033[31mError: Please provide a valid process ID.\033[m\n\n"
exit 1
fi
cd /proc || exit
echo_message "* System-wide ASLR" '' '' ''
aslrcheck
echo_message "* Does the CPU support NX: " '' '' ''
nxcheck
echo_message "* Process information:\n\n" "" "" ""
if ${extended_checks}; then
echo_message " COMMAND PID RELRO STACK CANARY Clang CFI SafeStack SECCOMP NX/PaX PIE Fortify Source\n" '' '' ''
else
echo_message " COMMAND PID RELRO STACK CANARY SECCOMP NX/PaX PIE Fortify Source\n" '' '' ''
fi
N=${CHK_PROC_LIBS}
if [[ -d "${N}" ]]; then
name=$(head -1 "${N}/status" | cut -b 7-)
if [[ "${format}" == "cli" ]]; then
printf "%16s" "${name}"
printf "%7d " "${N}"
else
echo_message "" "${name}," "<proc name='${name}'" "{ \"proc\": { \"name\":\"${name}\", "
echo_message "" "${N}," " pid='${N}'" "\"pid\":\"${N}\","
fi
# read permissions?
if [[ ! -r "${N}/exe" ]]; then
if ! (root_privs); then
printf "\033[31mNo read permissions for '/proc/%s/exe' (run as root).\033[m\n\n" "${N}"
exit 1
fi
if [[ ! "$(readlink "${N}"/exe)" ]]; then
printf "\033[31mPermission denied. Requested process ID belongs to a kernel thread.\033[m\n\n"
exit 1
fi
exit 1
fi
proccheck "${N}"
echo_message "\n\n\n" "\n" "\n" ","
if ${extended_checks}; then
echo_message " RELRO STACK CANARY Clang CFI SafeStack NX/PaX PIE Clang CFI SafeStack RPath RunPath Fortify Fortified Fortifiable\n" '' '' ''
else
echo_message " RELRO STACK CANARY NX/PaX PIE RPath RunPath Fortify Fortified Fortifiable\n" '' '' ''
fi
libcheck "${N}"
echo_message "\n" "\n" "</proc>\n" "} } }"
fi
}
#Check core dumps restricted?
coredumpcheck() {
coreValue=$(grep -Exic "hard[[:blank:]]+core[[:blank:]]+0" /etc/security/limits.conf)
coreValueDefault=$(grep -Exic "\*[[:blank:]]+hard[[:blank:]]+core[[:blank:]]+0" /etc/security/limits.conf)
dumpableValue=$(sysctl -b -e fs.suid_dumpable)
if { [[ "${coreValue}" == 1 ]] || [[ "${coreValueDefault}" == 1 ]]; } && { [[ "${dumpableValue}" == 0 ]] || [[ "${dumpableValue}" == 2 ]]; }; then
echo_message '\033[32mRestricted\033[m\n\n' '' '' ''
else
echo_message '\033[31mNot Restricted\033[m\n\n' '' '' ''
fi
}
debug_report() {
echo "***** Checksec debug *****"
failed=false
id
uname -a
echo "checksec version: ${SCRIPT_MAJOR}.${SCRIPT_MINOR}.${SCRIPT_REVISION} -- ${SCRIPT_VERSION}"
if [[ -f /etc/os-release ]]; then
# freedesktop.org and systemd
# shellcheck disable=SC1091
source /etc/os-release
# shellcheck disable=SC2153
OS=${NAME}
VER=${VERSION_ID}
elif type lsb_release > /dev/null 2>&1; then
# linuxbase.org
OS=$(lsb_release -si)
VER=$(lsb_release -sr)
elif [[ -f /etc/lsb-release ]]; then
# For some versions of Debian/Ubuntu without lsb_release command
# shellcheck disable=SC1091
source /etc/lsb-release
OS=${DISTRIB_ID}
VER=${DISTRIB_RELEASE}
elif [[ -f /etc/debian_version ]]; then
# Older Debian/Ubuntu/etc.
OS=Debian
VER=$(cat /etc/debian_version)
elif [[ -f /etc/SuSe-release ]]; then
# Older SuSE/etc.
OS=$(cat /etc/SuSe-release)
VER=$(uname -r)
elif [[ -f /etc/redhat-release ]]; then
# Older Red Hat, CentOS, etc.
OS=$(cat /etc/redhat-release)
VER=$(uname -r)
else
# Fall back to uname, e.g. "Linux <version>", also works for BSD, etc.
OS=$(uname -s)
VER=$(uname -r)
fi
echo "OS=${OS}"
echo "VER=${VER}"
for command in cat awk sysctl uname mktemp openssl grep stat file find head ps readlink basename id which wget curl readelf eu-readelf; do
path="$(command -v ${command})"
if [[ -e "${path}" ]]; then
ls -l "${path}"
if [[ -L "${path}" ]]; then
absolutepath=$(readlink -f "${path}")
ls -l "${absolutepath}"
file "${absolutepath}"
else
file "${path}"
fi
else
echo "*** can not find command ${command}"
failed=true
fi
done
if [[ ${failed} ]]; then
exit 1
fi
}
# check file(s)
filecheck() {
# check for RELRO support
if ${readelf} -l "${1}" 2> /dev/null | grep -q 'GNU_RELRO'; then
if ${readelf} -d "${1}" 2> /dev/null | grep -q 'BIND_NOW'; then
echo_message '\033[32mFull RELRO \033[m ' 'Full RELRO,' '<file relro="full"' " \"${1}\": { \"relro\":\"full\","
else
echo_message '\033[33mPartial RELRO\033[m ' 'Partial RELRO,' '<file relro="partial"' " \"${1}\": { \"relro\":\"partial\","
fi
else
echo_message '\033[31mNo RELRO \033[m ' 'No RELRO,' '<file relro="no"' " \"${1}\": { \"relro\":\"no\","
fi
# check for stack canary support
if ${readelf} -s "${1}" 2> /dev/null | grep -Eq '__stack_chk_fail|__stack_chk_guard|__intel_security_cookie'; then
echo_message '\033[32mCanary found \033[m ' 'Canary found,' ' canary="yes"' '"canary":"yes",'
else
echo_message '\033[31mNo canary found\033[m ' 'No Canary found,' ' canary="no"' '"canary":"no",'
fi
# check for NX support
if ${readelf} -l "${1}" 2> /dev/null | grep -q 'GNU_STACK'; then
if ${readelf} -l "${1}" 2> /dev/null | grep 'GNU_STACK' | grep -q 'RWE'; then
echo_message '\033[31mNX disabled\033[m ' 'NX disabled,' ' nx="no"' '"nx":"no",'
else
echo_message '\033[32mNX enabled \033[m ' 'NX enabled,' ' nx="yes"' '"nx":"yes",'
fi
else
echo_message '\033[31mNX disabled\033[m ' 'NX disabled,' ' nx="no"' '"nx":"no",'
fi
# check for PIE support
if ${readelf} -h "${1}" 2> /dev/null | grep -q 'Type:[[:space:]]*EXEC'; then
echo_message '\033[31mNo PIE \033[m ' 'No PIE,' ' pie="no"' '"pie":"no",'
elif ${readelf} -h "${1}" 2> /dev/null | grep -q 'Type:[[:space:]]*DYN'; then
if ${readelf} -d "${1}" 2> /dev/null | grep -q 'DEBUG'; then
echo_message '\033[32mPIE enabled \033[m ' 'PIE enabled,' ' pie="yes"' '"pie":"yes",'
else
echo_message '\033[33mDSO \033[m ' 'DSO,' ' pie="dso"' '"pie":"dso",'
fi
elif ${readelf} -h "${1}" 2> /dev/null | grep -q 'Type:[[:space:]]*REL'; then
echo_message '\033[33mREL \033[m ' 'REL,' ' pie="rel"' '"pie":"rel",'
else
echo_message '\033[33mNot an ELF file\033[m ' 'Not an ELF file,' ' pie="not_elf"' '"pie":"not_elf",'
fi
if ${extended_checks}; then
# check for selfrando support
if ${readelf} -S "${1}" 2> /dev/null | grep -c txtrp | grep -q '1'; then
echo_message '\033[32mSelfrando enabled \033[m '
else
echo_message '\033[31mNo Selfrando \033[m '
fi
fi
if ${extended_checks}; then
# check if compiled with Clang CFI
#if $readelf -s "$1" 2>/dev/null | grep -Eq '\.cfi'; then
read -r cfifunc <<< "$($readelf -s "${1}" 2> /dev/null | grep .cfi | awk '{ print $8 }')"
func=${cfifunc/.cfi/}
if [ -n "$cfifunc" ] && $readelf -s "$1" 2> /dev/null | grep -q "$func$"; then
echo_message '\033[32mClang CFI found \033[m ' 'with CFI,' ' clangcfi="yes"' '"clangcfi":"yes",'
else
echo_message '\033[31mNo Clang CFI found\033[m ' 'without CFI,' ' clangcfi="no"' '"clangcfi":"no",'
fi
# check if compiled with Clang SafeStack
if $readelf -s "$1" 2> /dev/null | grep -Eq '__safestack_init'; then
echo_message '\033[32mSafeStack found \033[m ' 'with SafeStack,' ' safestack="yes"' '"safestack":"yes",'
else
echo_message '\033[31mNo SafeStack found\033[m ' 'without SafeStack,' ' safestack="no"' '"safestack":"no",'
fi
fi
# check for rpath / run path
# search for a line that matches RPATH and extract the colon-separated path list within brackets
# example input: "0x000000000000000f (RPATH) Library rpath: [/lib/systemd:/lib/apparmor]"
IFS=: read -r -a rpath_array <<< "$(${readelf} -d "${1}" 2> /dev/null | awk -F'[][]' '/RPATH/ {print $2}')"
if [[ "${#rpath_array[@]}" -gt 0 ]]; then
if xargs stat -c %A <<< "${rpath_array[*]}" 2> /dev/null | grep -q 'rw'; then
echo_message '\033[31mRW-RPATH \033[m ' 'RPATH,' ' rpath="yes"' '"rpath":"yes",'
else
echo_message '\033[31mRPATH \033[m ' 'RPATH,' ' rpath="yes"' '"rpath":"yes",'
fi
else
echo_message '\033[32mNo RPATH \033[m ' 'No RPATH,' ' rpath="no"' '"rpath":"no",'
fi
# search for a line that matches RUNPATH and extract the colon-separated path list within brackets
IFS=: read -r -a runpath_array <<< "$(${readelf} -d "${1}" 2> /dev/null | awk -F'[][]' '/RUNPATH/ {print $2}')"
if [[ "${#runpath_array[@]}" -gt 0 ]]; then
if xargs stat -c %A <<< "${runpath_array[*]}" 2> /dev/null | grep -q 'rw'; then
echo_message '\033[31mRW-RUNPATH \033[m ' 'RUNPATH,' ' runpath="yes"' '"runpath":"yes",'
else
echo_message '\033[31mRUNPATH \033[m ' 'RUNPATH,' ' runpath="yes"' '"runpath":"yes",'
fi
else
echo_message '\033[32mNo RUNPATH \033[m ' 'No RUNPATH,' ' runpath="no"' '"runpath":"no",'
fi
# check for stripped symbols in the binary
IFS=" " read -r -a SYM_cnt <<< "$(${readelf} --symbols "${1}" 2> /dev/null | grep '\.symtab' | cut -d' ' -f5 | cut -d: -f1))"
if ${readelf} --symbols "${1}" 2> /dev/null | grep -q '\.symtab'; then
echo_message "\033[31m${SYM_cnt[0]} Symbols\t\033[m " 'Symbols,' ' symbols="yes"' '"symbols":"yes",'
else
echo_message '\033[32mNo Symbols\t\033[m ' 'No Symbols,' ' symbols="no"' '"symbols":"no",'
fi
# check for FORTIFY SOURCE
if [[ -e /lib/libc.so.6 ]]; then
FS_libc=/lib/libc.so.6
elif [[ -e /lib/libc.so.7 ]]; then
FS_libc=/lib/libc.so.7
elif [[ -e /lib/libc.so ]]; then
FS_libc=/lib/libc.so
elif [[ -e /lib64/libc.so.6 ]]; then
FS_libc=/lib64/libc.so.6
elif [[ -e /lib/i386-linux-gnu/libc.so.6 ]]; then
FS_libc=/lib/i386-linux-gnu/libc.so.6
elif [[ -e /lib/x86_64-linux-gnu/libc.so.6 ]]; then
FS_libc=/lib/x86_64-linux-gnu/libc.so.6
elif [[ -e /lib/arm-linux-gnueabihf/libc.so.6 ]]; then
FS_libc=/lib/arm-linux-gnueabihf/libc.so.6
elif [[ -e /lib/aarch64-linux-gnu/libc.so.6 ]]; then
FS_libc=/lib/aarch64-linux-gnu/libc.so.6
elif [[ -e /usr/x86_64-gentoo-linux-musl/bin/ld ]]; then
FS_libc=/usr/x86_64-gentoo-linux-musl/bin/ld
else
printf "\033[31mError: libc not found.\033[m\n\n"
exit 1
fi
FS_filechk_func_libc="$(${readelf} -s $FS_libc 2> /dev/null | sed -ne 's/.*__\(.*_chk\)@@.*/\1/p')"
FS_func_libc="${FS_filechk_func_libc//_chk/}"
FS_func="$(${readelf} --dyn-syms "${1}" 2> /dev/null | awk '{ print $8 }' | sed -e 's/_*//' -e 's/@.*//' -e '/^$/d')"
FS_cnt_checked=$(grep -cFxf <(sort <<< "${FS_filechk_func_libc}") <(sort <<< "${FS_func}"))
FS_cnt_unchecked=$(grep -cFxf <(sort <<< "${FS_func_libc}") <(sort <<< "${FS_func}"))
FS_cnt_total=$((FS_cnt_unchecked + FS_cnt_checked))
if grep -q '_chk$' <<< "$FS_func"; then
echo_message '\033[32mYes\033[m' 'Yes,' ' fortify_source="yes" ' '"fortify_source":"yes",'
else
echo_message "\033[31mNo\033[m" "No," ' fortify_source="no" ' '"fortify_source":"no",'
fi
echo_message "\t${FS_cnt_checked}\t" "${FS_cnt_checked}", "fortified=\"${FS_cnt_checked}\" " "\"fortified\":\"${FS_cnt_checked}\","
echo_message "\t${FS_cnt_total}\t\t" "${FS_cnt_total}" "fortify-able=\"${FS_cnt_total}\"" "\"fortify-able\":\"${FS_cnt_total}\""
}
# format
format() {
list="cli csv xml json"
if [[ -n "${output_format}" ]]; then
if [[ ! ${list} =~ ${output_format} ]]; then
printf "\033[31mError: Please provide a valid format {cli, csv, xml, json}.\033[m\n\n"
exit 1
fi
fi
if [[ "${output_format}" == "xml" ]]; then
echo '<?xml version="1.0" encoding="UTF-8"?>'
fi
format="${output_format}"
}
# --- FORTIFY_SOURCE subfunctions (start) ---
# is FORTIFY_SOURCE supported by libc?
FS_libc_check() {
echo_message "* FORTIFY_SOURCE support available (libc) : " "" ""
if [[ "${#FS_chk_func_libc[@]}" != "0" ]]; then
echo_message "\033[32mYes\033[m\n" "Yes," " libc_fortify_source='yes' " ', "libc_fortify_source":"yes"'
else
echo_message "\033[31mNo\033[m\n" "No," " libc_fortify_source='no' " ', "libc_fortify_source":"no"'
exit 1
fi
}
# was the binary compiled with FORTIFY_SOURCE?
FS_binary_check() {
echo_message "* Binary compiled with FORTIFY_SOURCE support: " "" "" ""
for ((FS_elem_functions = 0; FS_elem_functions < ${#FS_functions[@]}; FS_elem_functions++)); do
if [[ ${FS_functions[$FS_elem_functions]} =~ _chk$ ]]; then
echo_message "\033[32mYes\033[m\n" "Yes\n" " binary_compiled_with_fortify='yes'>\n" ', "binary_compiled_with_fortify":"yes"'
return
fi
done
echo_message "\033[31mNo\033[m\n" "No\n" " binary_compiled_with_fortify='no'>\n" ', "binary_compiled_with_fortify":"no"'
}
FS_comparison() {
echo_message "\n" "" ""
echo_message " ------ EXECUTABLE-FILE ------- . -------- LIBC --------\n" "" "" ""
echo_message " Fortifiable library functions | Checked function names\n" "" "" ""
echo_message " -------------------------------------------------------\n" "" "" ""
for ((FS_elem_libc = 0; FS_elem_libc < ${#FS_chk_func_libc[@]}; FS_elem_libc++)); do
for ((FS_elem_functions = 0; FS_elem_functions < ${#FS_functions[@]}; FS_elem_functions++)); do
FS_tmp_func=${FS_functions[$FS_elem_functions]}
FS_tmp_libc=${FS_chk_func_libc[$FS_elem_libc]}
if [[ ${FS_tmp_func} =~ ^${FS_tmp_libc}$ ]]; then
if [[ ${format} == "cli" ]]; then
printf " \033[31m%-30s\033[m | __%s%s\n" "${FS_tmp_func}" "${FS_tmp_libc}" "${FS_end}"
else
if [[ $FS_elem_functions == 0 ]]; then
echo_message "" "${FS_tmp_func},${FS_tmp_libc},yes\n" " <function name='${FS_tmp_func}' libc='${FS_tmp_libc}' fortifiable='yes' />\n" ", \"function\": { \"name\":\"${FS_tmp_func}\", \"libc\":\"${FS_tmp_libc}\", \"fortifiable\":\"yes\" }"
elif [[ $FS_elem_functions == $((${#FS_functions[@]} - 1)) ]]; then
echo_message "" "${FS_tmp_func},${FS_tmp_libc},yes\n" " <function name='${FS_tmp_func}' libc='${FS_tmp_libc}' fortifiable='yes' />\n" ", \"function\": { \"name\":\"${FS_tmp_func}\", \"libc\":\"${FS_tmp_libc}\", \"fortifiable\":\"yes\" }"
else
echo_message "" "${FS_tmp_func},${FS_tmp_libc},yes\n" " <function name='${FS_tmp_func}' libc='${FS_tmp_libc}' fortifiable='yes' />\n" ", \"function\": { \"name\":\"${FS_tmp_func}\", \"libc\":\"${FS_tmp_libc}\", \"fortifiable\":\"yes\" }"
fi
fi
((FS_cnt_total++))
((FS_cnt_unchecked++))
elif [[ ${FS_tmp_func} =~ ^${FS_tmp_libc}(_chk)$ ]]; then
if [[ ${format} == "cli" ]]; then
printf " \033[32m%-30s\033[m | __%s%s\n" "${FS_tmp_func}" "${FS_tmp_libc}" "${FS_end}"
else
if [[ $FS_elem_functions == 0 ]]; then
echo_message "" "${FS_tmp_func},${FS_tmp_libc},no\n" " <function name='${FS_tmp_func}' libc='${FS_tmp_libc}' fortifiable='no' />\n" ", \"function\": { \"name\":\"${FS_tmp_func}\", \"libc\":\"${FS_tmp_libc}\", \"fortifiable\":\"no\" }"
elif [[ $FS_elem_functions == $((${#FS_functions[@]} - 1)) ]]; then
echo_message "" "${FS_tmp_func},${FS_tmp_libc},no\n" " <function name='${FS_tmp_func}' libc='${FS_tmp_libc}' fortifiable='no' />\n" ", \"function\": { \"name\":\"${FS_tmp_func}\", \"libc\":\"${FS_tmp_libc}\", \"fortifiable\":\"no\" }"
else
echo_message "" "${FS_tmp_func},${FS_tmp_libc},no\n" " <function name='${FS_tmp_func}' libc='${FS_tmp_libc}' fortifiable='no' />\n" ", \"function\": { \"name\":\"${FS_tmp_func}\", \"libc\":\"${FS_tmp_libc}\", \"fortifiable\":\"no\" }"
fi
fi
((FS_cnt_total++))
((FS_cnt_checked++))
fi
done
done
}
FS_summary() {
echo_message "\n" "" "\n" ""
echo_message "SUMMARY:\n\n" "" "" ""
echo_message "* Number of checked functions in libc : ${#FS_chk_func_libc[@]}\n" "${#FS_chk_func_libc[@]}," " <stats nb_libc_func='${#FS_chk_func_libc[@]}'" ", \"stats\": { \"nb_libc_func\":\"${#FS_chk_func_libc[@]}\""
echo_message "* Total number of library functions in the executable: ${#FS_functions[@]}\n" "${#FS_functions[@]}," " nb_total_func='${#FS_functions[@]}'" ", \"nb_total_func\":\"${#FS_functions[@]}\""
echo_message "* Number of Fortifiable functions in the executable : ${FS_cnt_total}\n" "${FS_cnt_total}," " nb_fortifiable_func='${FS_cnt_total}'" ", \"nb_fortifiable_func\":\"${FS_cnt_total}\""
echo_message "* Number of checked functions in the executable : \033[32m${FS_cnt_checked}\033[m\n" "${FS_cnt_checked}," " nb_checked_func='${FS_cnt_checked}'" ", \"nb_checked_func\":\"${FS_cnt_checked}\""
echo_message "* Number of unchecked functions in the executable : \033[31m${FS_cnt_unchecked}\033[m\n" "${FS_cnt_unchecked}" " nb_unchecked_func='${FS_cnt_unchecked}' />" ", \"nb_unchecked_func\":\"${FS_cnt_unchecked}\" } "
echo_message "\n" "\n" "\n" ""
}
echo_message() {
if [[ ${format} == "csv" ]]; then
echo -n -e "$2"
elif [[ ${format} == "xml" ]]; then
echo -n -e "$3"
elif [[ ${format} == "json" ]]; then
echo -n -e "$4"
else #default to cli
echo -n -e "${1}"
fi
}
# check if input is numeric
isNumeric() {
echo "$@" | grep -q -v "[^0-9]"
}
# check if input is a string
isString() {
echo "$@" | grep -q -v "[^ A-Z_a-z]"
}
# help
help() {
echo "Usage: checksec [--format={cli,csv,xml,json}] [OPTION]"
echo
echo
echo "Options:"
echo
echo " ## Checksec Options"
echo " --file={file}"
echo " --dir={directory}"
echo " --listfile={text file with one file per line}"
echo " --proc={process name}"
echo " --proc-all"
echo " --proc-libs={process ID}"
echo " --kernel[=kconfig]"
echo " --fortify-file={executable-file}"
echo " --fortify-proc={process ID}"
echo " --version"
echo " --help"
if ! ${pkg_release}; then
echo " --update or --upgrade"
fi
echo
echo " ## Modifiers"
echo " --debug"
echo " --verbose"
echo " --format={cli,csv,xml,json}"
echo " --output={cli,csv,xml,json}"
echo " --extended"
echo
echo "For more information, see:"
echo " http://github.com/slimm609/checksec.sh"