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checksec
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#!/usr/bin/env bash
#
# 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.
#
# --- 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
#set global lang to C
export LC_ALL="C"
# global vars
debug=false
have_readelf=1
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"
SCRIPT_VERSION=2018012401
SCRIPT_MAJOR=1
SCRIPT_MINOR=8
SCRIPT_REVISION=0
pkg_release=false
if [[ $(id -u) != 0 ]]; then
export PATH=$PATH:/sbin/:/usr/sbin/
fi
sysarch=$(uname -m)
if [[ "$sysarch" == "x86_64" ]]; then
arch="64"
elif [[ "$sysarch" == "i?86" ]]; then
arch="32"
elif [[ "$sysarch" =~ "arm" ]]; then
arch="arm"
fi
#openssl public key for verification of updates
read -r PUBKEY <<EOF
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
EOF
# FORTIFY_SOURCE vars
FS_end=_chk
FS_cnt_total=0
FS_cnt_checked=0
FS_cnt_unchecked=0
FS_chk_func_libc=0
FS_functions=0
FS_libc=0
# check if command exists
command_exists () {
type "${1}" > /dev/null 2>&1;
}
# Fetch the update
fetch() {
if type wget > /dev/null 2>&1 ; then
$debug && echo "fetching update via wget"
wget --no-check-certificate -O "${2}" "${1}" >/dev/null 2>&1
elif type curl > /dev/null 2>&1 ; then
$debug && echo "fetching update via curl"
curl --insecure --remote-name -o "${2}" "${1}" >/dev/null 2>&1
else
echo 'Warning: Neither wget nor curl is available. online updates unavailable' >&2
exit 1
fi
}
# version information
version() {
echo "checksec v${SCRIPT_MAJOR}.${SCRIPT_MINOR}.${SCRIPT_REVISION}, Brian Davis, github.com/slimm609/checksec.sh, Dec 2015"
echo "Based off checksec v1.5, Tobias Klein, www.trapkit.de, November 2011"
echo
}
# help
help() {
echo "Usage: checksec [--output {cli|csv|xml|json}] [OPTION]"
echo
echo
echo "Options:"
echo
echo " --file (-f) <executable-file>"
echo " --dir (-d) <directory> [-v]"
echo " --proc (-p) <process name>"
echo " --proc-all (-pa)"
echo " --proc-libs (-pl) <process ID>"
echo " --kernel (-k) [kconfig]"
echo " --fortify-file (-ff)<executable-file>"
echo " --fortify-proc (-fp) <process ID>"
echo " --version"
echo " --help"
if ! $pkg_release; then
echo " --update"
fi
echo
echo "For more information, see:"
echo " http://github.com/slimm609/checksec.sh"
echo
}
#run help if nothing is passed
if [[ $# -lt 1 ]]; then
help
exit 1
fi
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 selinux status
getsestatus() {
$debug && echo -e "\n***fuction getsestatus"
if (command_exists getenforce); then
$debug && echo "***fuction getsestatus->getenforce"
sestatus=$(getenforce)
if [[ "$sestatus" == "Disabled" ]]; then
status=0
elif [[ "$sestatus" == "Permissive" ]]; then
status=1
elif [[ "$sestatus" == "Enforcing" ]]; then
status=2
fi
elif (command_exists sestatus); then
$debug && echo "***fuction getsestatus->sestatus"
sestatus=$(sestatus | grep "SELinux status" | awk '{ print $3}')
if [[ "$sestatus" == "disabled" ]]; then
status=0
elif [[ "$sestatus" == "enabled" ]]; then
sestatus2=$(sestatus | grep "Current" | awk '{ print $3}')
if [[ "$sestatus2" == "permissive" ]]; then
status=1
elif [[ "$sestatus2" == "enforcing" ]]; then
status=2
fi
fi
fi
return $status
}
# check if directory exists
dir_exists () {
$debug && echo "fuction dir_exists"
if [[ -d "$1" ]] ; then
return 0
else
return 1
fi
}
# check user privileges
root_privs () {
$debug && echo "***function root_privs"
if [[ $(/usr/bin/id -u) -eq 0 ]] ; then
return 0
else
return 1
fi
}
# check if input is numeric
isNumeric () {
$debug && echo "***function isNumeric"
echo "$@" | grep -q -v "[^0-9]"
}
# check if input is a string
isString () {
$debug && echo "***function isString"
echo "$@" | grep -q -v "[^ A-Z_a-z]"
}
FS_count() {
$debug && echo "***function FS_Count"
for ((FS_elem_libc=0; FS_elem_libc<${#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
(( FS_cnt_total++ ))
(( FS_cnt_unchecked++ ))
elif [[ $FS_tmp_func =~ ^$FS_tmp_libc(_chk) ]] ; then
(( FS_cnt_total++ ))
(( FS_cnt_checked++ ))
fi
done
done
}
# check file(s)
filecheck() {
$debug && echo "***function filecheck"
# check for RELRO support
$debug && echo "***function filecheck->RELRO"
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"' ' "file": { "relro":"full",'
else
echo_message '\033[33mPartial RELRO\033[m ' 'Partial RELRO,' '<file relro="partial"' ' "file": { "relro":"partial",'
fi
else
echo_message '\033[31mNo RELRO \033[m ' 'No RELRO,' '<file relro="no"' ' "file": { "relro":"no",'
fi
# check for stack canary support
$debug && echo -e "\n***function filecheck->canary"
if $readelf -s "$1" 2>/dev/null | grep -q '__stack_chk_fail'; 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
$debug && echo -e "\n***function filecheck->nx"
if $readelf -W -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
# check for PIE support
$debug && echo -e "\n***function filecheck->pie"
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
else
echo_message '\033[33mNot an ELF file\033[m ' 'Not an ELF file,' ' pie="not_elf"' '"pie":"not_elf",'
fi
# check for rpath / run path
$debug && echo -e "\n***function filecheck->rpath"
if $readelf -d "$1" 2>/dev/null | grep -q 'rpath'; then
echo_message '\033[31mRPATH \033[m ' 'RPATH,' ' rpath="yes"' '"rpath":"yes",'
else
echo_message '\033[32mNo RPATH \033[m ' 'No RPATH,' ' rpath="no"' '"rpath":"no",'
fi
$debug && echo -e "\n***function filecheck->runpath"
if $readelf -d "$1" 2>/dev/null | grep -q 'runpath'; then
echo_message '\033[31mRUNPATH \033[m ' 'RUNPATH,' ' runpath="yes"' '"runpath":"yes",'
else
echo_message '\033[32mNo RUNPATH \033[m ' 'No RUNPATH,' ' runpath="no"' '"runpath":"no",'
fi
# check for FORTIFY SOURCE
$debug && echo "***function filecheck->fortify"
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
else
printf "\033[31mError: libc not found.\033[m\n\n"
exit 1
fi
FS_cnt_checked=0
FS_cnt_total=0
FS_chk_func_libc=( $($readelf -s $FS_libc | grep _chk@@ | awk '{ print $8 }' | cut -c 3- | sed -e 's/_chk@.*//') )
FS_functions=( $($readelf -s "$1" | awk '{ print $8 }' | sed 's/_*//' | sed -e 's/@.*//') )
FS_count
for ((FS_elem_functions=0; FS_elem_functions<${#FS_functions[@]}; FS_elem_functions++))
do
if [[ ${FS_functions[$FS_elem_functions]} =~ _chk ]] ; then
echo_message '\033[32mYes\033[m' 'Yes,' ' fortify_source="yes" ' '"fortify_source":"yes",'
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" ${FS_cnt_total} "fortify-able=\"$FS_cnt_total\"" "\"fortify-able\":\"$FS_cnt_total\""
return
fi
done
echo_message "\033[31mNo\033[m" "No," ' fortify_source="no" ' '"fortify_source":"no",'
echo_message "\t$FS_cnt_checked\t" ${FS_cnt_checked}, "fortified=\"$FS_cnt_checked\" " "\"fortified\":\"${FS_cnt_checked}\","
echo_message "\t${FS_cnt_total}\t" ${FS_cnt_total} "fortify-able=\"$FS_cnt_total\"" "\"fortify-able\":\"$FS_cnt_total\""
}
# check process(es)
proccheck() {
$debug && echo -e "\n***function proccheck"
# check for RELRO support
$debug && echo "***function proccheck->RELRO"
if $readelf -l "$1/exe" 2>/dev/null | grep -q 'Program Headers'; then
if $readelf -l "$1/exe" 2>/dev/null | grep -q 'GNU_RELRO'; then
if $readelf -d "$1/exe" 2>/dev/null | grep -q 'BIND_NOW'; then
echo_message '\033[32mFull RELRO \033[m ' 'Full RELRO,' ' relro="full"' '"relro":"full",'
else
echo_message '\033[33mPartial RELRO\033[m ' 'Partial RELRO,' ' relro="partial"' '"relro":"partial",'
fi
else
echo_message '\033[31mNo RELRO \033[m ' 'No RELRO,' ' relro="no"' '"relro":"no",'
fi
else
echo -n -e '\033[31mPermission denied (please run as root)\033[m\n'
exit 1
fi
# check for stack canary support
$debug && echo -e "\n***function proccheck->canary"
if $readelf -s "$1/exe" 2>/dev/null | grep -q 'Symbol table'; then
if $readelf -s "$1/exe" 2>/dev/null | grep -q '__stack_chk_fail'; 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
else
if [[ "$1" == "1" ]] ; then
echo -n -e '\033[33mPermission denied \033[m '
else
echo -n -e '\033[33mNo symbol table found \033[m '
fi
fi
# check for Seccomp mode
$debug && echo -e "\n***function proccheck->Seccomp"
seccomp=$(grep 'Seccomp:' "$1/status" 2> /dev/null | cut -b10)
if [[ "$seccomp" == "1" ]] ; then
echo_message '\033[32mSeccomp strict\033[m ' 'Seccomp strict,' ' seccomp="strict"' '"seccomp":"strict",'
elif [[ "$seccomp" == "2" ]] ; then
echo_message '\033[32mSeccomp-bpf \033[m ' 'Seccomp-bpf,' ' seccomp="bpf"' '"seccomp":"bpf",'
else
echo_message '\033[31mNo Seccomp \033[m ' 'No Seccomp,' ' seccomp="no"' '"seccomp":"no",'
fi
# first check for PaX support
$debug && echo -e "\n***function proccheck->PAX"
if grep -q 'PaX:' "$1/status" 2> /dev/null ; then
pageexec=$(grep 'PaX:' "$1/status" 2> /dev/null | cut -b6)
segmexec=$(grep 'PaX:' "$1/status" 2> /dev/null | cut -b10)
mprotect=$(grep 'PaX:' "$1/status" 2> /dev/null | cut -b8)
randmmap=$(grep 'PaX:' "$1/status" 2> /dev/null | cut -b9)
if [[ "$pageexec" = "P" || "$segmexec" = "S" ]] && [[ "$mprotect" = "M" && "$randmmap" = "R" ]] ; then
echo_message '\033[32mPaX enabled\033[m ' 'Pax enabled,' ' pax="yes"' '"pax":"yes",'
elif [[ "$pageexec" = "p" && "$segmexec" = "s" && "$randmmap" = "R" ]] ; then
echo_message '\033[33mPaX ASLR only\033[m ' 'Pax ASLR only,' ' pax="aslr_only"' '"pax":"aslr_only",'
elif [[ "$pageexec" = "P" || "$segmexec" = "S" ]] && [[ "$mprotect" = "m" && "$randmmap" = "R" ]] ; then
echo_message '\033[33mPaX mprot off \033[m' 'Pax mprot off,' ' pax="mprot_off"' '"pax":"mprot_off",'
elif [[ "$pageexec" = "P" || "$segmexec" = "S" ]] && [[ "$mprotect" = "M" && "$randmmap" = "r" ]] ; then
echo_message '\033[33mPaX ASLR off\033[m ' 'Pax ASLR off,' ' pax="aslr_off"' '"pax":"aslr_off",'
elif [[ "$pageexec" = "P" || "$segmexec" = "S" ]] && [[ "$mprotect" = "m" && "$randmmap" = "r" ]] ; then
echo_message '\033[33mPaX NX only\033[m ' 'Pax NX only,' ' pax="nx_only"' '"pax":"nx_only",'
else
echo_message '\033[31mPaX disabled\033[m ' 'Pax disabled,' ' pax="no"' '"pax":"no",'
fi
# fallback check for NX support
$debug && echo -e "\n***function proccheck->NX"
elif $readelf -W -l "$1/exe" 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,' ' pax="yes"' '"nx":"yes",'
fi
# check for PIE support
$debug && echo -e "\n***function proccheck->PIE"
if $readelf -h "$1/exe" 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/exe" 2>/dev/null | grep -q 'Type:[[:space:]]*DYN'; then
if $readelf -d "$1/exe" 2>/dev/null | grep -q 'DEBUG'; then
echo_message '\033[32mPIE enabled \033[m ' 'PIE enabled,' ' pie="yes"' '"pie":"yes",'
else
echo_message '\033[33mDynamic Shared Object\033[m ' 'Dynamic Shared Object,' ' pie="dso"' '"pie":"dso",'
fi
else
echo_message '\033[33mNot an ELF file \033[m ' 'Not an ELF file,' ' pie="not_elf"' '"pie":"not_elf",'
fi
#check for forifty source support
FS_functions=( $($readelf -s "$1/exe" | awk '{ print $8 }' | sed 's/_*//' | sed -e 's/@.*//') )
for ((FS_elem_functions=0; FS_elem_functions<${#FS_functions[@]}; FS_elem_functions++))
do
if [[ ${FS_functions[$FS_elem_functions]} =~ _chk ]] ; then
echo_message '\033[32mYes\033[m' 'Yes' " fortify_source='yes'>" '"fortify_source":"yes" }'
return
fi
done
echo_message "\033[31mNo\033[m" "No" " fortify_source='no'>" '"fortify_source":"no" }'
}
# check mapped libraries
libcheck() {
$debug && echo "***function libcheck"
libs=( $(awk '{ print $6 }' "/proc/$1/maps" | grep '/' | sort -u | xargs file | grep ELF | awk '{ print $1 }' | sed 's/:/ /') )
echo_message "\n* Loaded libraries (file information, # of mapped files: ${#libs[@]}):\n\n" "" "" ""
for ((element=0; element<${#libs[@]}; element++))
do
echo_message " ${libs[$element]}:\n" "${libs[$element]}," "" ""
echo_message " " "" " " ""
filecheck "${libs[$element]}"
echo_message "\n\n" "\n" " filename='${libs[$element]}' />\n" "\"filename\"=\"${libs[$element]}\""
done
}
# check for system-wide ASLR support
aslrcheck() {
$debug && echo "***function aslrcheck"
# PaX ASLR support
$debug && echo -e "\n***function aslrcheck->PAX ASLR"
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
$debug && echo -e "\n***function aslrcheck->randomize_va_space"
# 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
}
# check cpu nx flag
nxcheck() {
$debug && echo -e "\n***function nxcheck"
if grep -q nx /proc/cpuinfo; then
echo_message '\033[32mYes\033[m\n\n' '' '' ''
else
echo_message '\033[31mNo\033[m\n\n' '' '' ''
fi
}
# check for kernel protection mechanisms
kernelcheck() {
$debug && echo "***function kernelcheck"
echo_message " Description - List the status of kernel protection mechanisms. Rather than\n" '' '' ''
echo_message " inspect kernel mechanisms that may aid in the prevention of exploitation of\n" '' '' ''
echo_message " userspace processes, this option lists the status of kernel configuration\n" '' '' ''
echo_message " options that harden the kernel itself against attack.\n\n" '' '' ''
echo_message " Kernel config:\n" '' '' '{ "kernel": '
if [[ ! "$1" == "" ]] ; then
kconfig="cat $1"
echo_message " Warning: The config $1 on disk may not represent running kernel config!\n\n" "$1" "<kernel config=\"$1\"" "{ \"KernelConfig\":\"$1\","
elif [[ -f /proc/config.gz ]] ; then
kconfig="zcat /proc/config.gz"
echo_message "\033[32m/proc/config.gz\033[m\n\n" '/proc/config.gz' '<kernel config="/proc/config.gz"' '{ "KernelConfig":"/proc/config.gz",'
elif [[ -f /boot/config-"$(uname -r)" ]] ; then
kconfig="cat /boot/config-$(uname -r)"
kern=$(uname -r)
echo_message "\033[33m/boot/config-$kern\033[m\n\n" "/boot/config-$kern," "<kernel config='/boot/config-$kern'" "{ \"KernelConfig\":\"/boot/config-$kern\","
echo_message " Warning: The config on disk may not represent running kernel config!\n\n" "" "" ""
elif [[ -f "${KBUILD_OUTPUT:-/usr/src/linux}"/.config ]] ; then
kconfig="cat ${KBUILD_OUTPUT:-/usr/src/linux}/.config"
echo_message "\033[33m${KBUILD_OUTPUT:-/usr/src/linux}/.config\033[m\n\n" "${KBUILD_OUTPUT:-/usr/src/linux}/.config," "<kernel config='${KBUILD_OUTPUT:-/usr/src/linux}/.config'" "{ \"KernelConfig\":\"${KBUILD_OUTPUT:-/usr/src/linux}/.config\","
echo_message " Warning: The config on disk may not represent running kernel config!\n\n" "" "" ""
else
echo_message "\033[31mNOT FOUND\033[m\n\n" "NOT FOUND,,,,,,," "<kernel config='not_found' />" '{ "KernelConfig":"not_found",'
exit 0
fi
$debug && $kconfig | grep "CONFIG_GRKERNSEC"
$debug && $kconfig | grep "CONFIG_PAX"
echo_message " Vanilla Kernel ASLR: " "" "" ""
randomize_va=$(sysctl -b -e kernel.randomize_va_space)
if [[ "x$randomize_va" == "x2" ]]; then
echo_message "\033[32mFull\033[m\n" "Full," " randomize_va_space='full'" '"randomize_va_space":"full",'
elif [[ "x$randomize_va" == "x1" ]]; then
echo_message "\033[33mPartial\033[m\n" "Partial," " randomize_va_space='partial'" '"randomize_va_space":"partial",'
else
echo_message "\033[31mNone\033[m\n" "None," " randomize_va_space='none'" '"randomize_va_space":"none",'
fi
echo_message " Protected symlinks: " "" "" ""
symlink=$(sysctl -b -e fs.protected_symlinks)
if [[ "x$symlink" == "x1" ]]; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " protect_symlinks='yes'" '"protect_symlinks":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " protect_symlinks='no'" '"protect_symlinks":"no",'
fi
echo_message " Protected hardlinks: " "" "" ""
hardlink=$(sysctl -b -e fs.protected_hardlinks)
if [[ "x$hardlink" == "x1" ]]; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " protect_hardlinks='yes'" '"protect_hardlinks":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " protect_hardlinks='no'" '"protect_hardlinks":"no",'
fi
echo_message " Ipv4 reverse path filtering: " "" "" ""
ipv4_rpath=$(sysctl -b -e net.ipv4.conf.all.rp_filter)
if [[ "x$ipv4_rpath" == "x1" ]]; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " ipv4_rpath='yes'" '"ipv4_rpath":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " ipv4_rpath='no'" '"ipv4_rpath":"no",'
fi
echo_message " Ipv6 reverse path filtering: " "" "" ""
ipv6_rpath=$(sysctl -b -e net.ipv6.conf.all.rp_filter)
if [[ "x$ipv6_rpath" == "x1" ]]; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " ipv6_rpath='yes'" '"ipv6_rpath":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " ipv6_rpath='no'" '"ipv6_rpath":"no",'
fi
echo_message " Kernel heap randomization: " "" "" ""
# NOTE: y means it turns off kernel heap randomization for backwards compatability (libc5)
if $kconfig | grep -qi 'CONFIG_COMPAT_BRK=y'; then
echo_message "\033[31mDisabled\033[m\n" "Disabled," " kernel_heap_randomization='no'" '"kernel_heap_randomization":"no",'
else
echo_message "\033[32mEnabled\033[m\n" "Enabled," " kernel_heap_randomization='yes'" '"kernel_heap_randomization":"yes",'
fi
echo_message " GCC stack protector support: " "" "" ""
if $kconfig | grep -qi 'CONFIG_CC_STACKPROTECTOR=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " gcc_stack_protector='yes'" '"gcc_stack_protector":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " gcc_stack_protector='no'" '"gcc_stack_protector":"no",'
fi
if ! $kconfig | grep -qi 'CONFIG_PAX'; then
echo_message " Enforce read-only kernel data: " "" "" ""
if $kconfig | grep -qi 'CONFIG_DEBUG_RODATA=y\|CONFIG_STRICT_KERNEL_RWX=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " ro_kernel_data='yes'" '"ro_kernel_data":"yes",'
echo_message " Enforce read-only module data: " "" "" ""
if $kconfig | grep -qi 'CONFIG_STRICT_MODULE_RWX=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " ro_module_data='yes'" '"ro_module_data":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " ro_module_data='no'" '"ro_module_data":"no",'
fi
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " ro_kernel_data='no'" '"ro_kernel_data":"no",'
fi
fi
echo_message " Hardened Usercopy: " "" "" ""
if $kconfig | grep -qi 'CONFIG_HARDENED_USERCOPY=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " hardened_usercopy='yes'" '"hardened_usercopy":"yes",'
echo_message " Hardened Usercopy Pagespan: " "" "" ""
if $kconfig | grep -qi 'CONFIG_HARDENED_USERCOPY_PAGESPAN=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " hardened_usercopy_pagespan='yes'" '"hardened_usercopy_pagespan":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " hardened_usercopy_pagespan='no'" '"hardened_usercopy_pagespan":"no",'
fi
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " hardened_usercopy='no'" '"hardened_usercopy":"no",'
fi
echo_message " Restrict /dev/mem access: " "" "" ""
if $kconfig | grep -qi 'CONFIG_STRICT_DEVMEM=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " restrict_dev_mem_access='yes'" '"restrict_dev_mem_access":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " restrict_dev_mem_access='no'" '"restrict_dev_mem_access":"no",'
fi
echo_message " Restrict /dev/kmem access: " "" "" ""
if $kconfig | grep -qi 'CONFIG_DEVKMEM=y'; then
echo_message "\033[31mDisabled\033[m\n" "Disabled" " restrict_dev_kmem_access='no'" '"restrict_dev_kmem_access":"no" },'
else
echo_message "\033[32mEnabled\033[m\n" "Enabled" " restrict_dev_kmem_access='yes'" '"restrict_dev_kmem_access":"yes" },'
fi
#x86 only
if [[ "$arch" == "32" ]] || [[ "$arch" == "64" ]]; then
echo_message "\n" "\n" "" ""
echo_message "* X86 only: \n" "" "" ""
if ! $kconfig | grep -qi 'CONFIG_PAX_SIZE_OVERFLOW=y'; then
if $kconfig | grep -qi 'CONFIG_DEBUG_STRICT_USER_COPY_CHECKS'; then
echo_message " Strict user copy checks: " "" "" ""
if $kconfig | grep -qi 'CONFIG_DEBUG_STRICT_USER_COPY_CHECKS=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " strict_user_copy_check='yes'" '"strict_user_copy_check":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " strict_user_copy_check='no'" '"strict_user_copy_check":"no",'
fi
fi
fi
echo_message " Address space layout randomization: " "" "" ""
if $kconfig | grep -qi 'CONFIG_RANDOMIZE_BASE=y\|CONFIG_PAX_ASLR=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled" " random_address_space_layout='yes'>" '"random_address_space_layout":"yes" },'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " random_address_space_layout='no'>" '"random_address_space_layout":"no",'
fi
fi
#ARM only
if [[ "$arch" == "arm" ]]; then
echo_message "\n" "\n" "\n" ""
echo_message "* ARM only: \n" "" "" ""
echo_message " Restrict kernel memory permissions: " "" "" ""
if $kconfig | grep -qi 'CONFIG_ARM_KERNMEM_PERMS=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled" " arm_kernmem_perms='yes'>" '"arm_kernmem_perms":"yes" },'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " arm_kernmem_perms='no'>" '"arm_kernmem_perms":"no",'
fi
fi
echo_message "\n" "\n" "\n" ""
echo_message "* SELinux: " "" "" ""
if $kconfig | grep -qi 'CONFIG_SECURITY_SELINUX=y'; then
getsestatus
sestatus=$?
if [[ $sestatus == 0 ]]; then
echo_message "\033[31mDisabled\033[m\n" "Disabled,," " <selinux enabled='no'" '"selinux":{ "enabled":"no"'
echo_message "\n SELinux infomation available here: \n" "" "" ""
echo_message " http://selinuxproject.org/\n" "" "" ""
elif [[ $sestatus == 1 ]]; then
echo_message "\033[33mPermissive\033[m\n" "Permissive," " <selinux enabled='yes' mode='permissive'" '"selinux":{ "enabled":"yes", "mode":"permissive"'
elif [[ $sestatus == 2 ]]; then
echo_message "\033[32mEnforcing\033[m\n" "Enforcing," " <selinux enabled='yes' mode='enforcing'" '"selinux":{ "enabled":"yes", "mode":"enforcing"'
fi
else
echo_message "\033[31mNo SELinux\033[m\n" "Disabled,," " <selinux enabled='no'" '"selinux":{ "enabled":"no"'
echo_message "\n SELinux infomation available here: \n" "" "" ""
echo_message " http://selinuxproject.org/\n" "" "" ""
fi
if [[ $sestatus == 1 ]] || [[ $sestatus == 2 ]]; then
echo_message " Checkreqprot: " "" "" ""
if [[ $(cat /sys/fs/selinux/checkreqprot) == 0 ]]; then
echo_message "\033[32m Enabled\033[m\n" "Enabled," " checkreqprot='yes'" ', "checkreqprot":"yes"'
else
echo_message "\033[31m Disabled\033[m\n" "Disabled," " checkreqprot='no'" ', "checkreqprot":"no"'
fi
echo_message " Deny Unknown: " "" "" ""
if [[ $(cat /sys/fs/selinux/deny_unknown) == 1 ]]; then
echo_message "\033[32m Enabled\033[m\n" "Enabled" " deny_unknown='yes'" ', "deny_unknown":"yes"'
else
echo_message "\033[31m Disabled\033[m\n" "Disabled" " deny_unknown='no'" ', "deny_unknown":"no"'
fi
fi
echo_message "\n" "\n" " />\n" " },"
echo_message "* grsecurity / PaX: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC=y'; then
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_HIGH=y'; then
echo_message "\033[32mHigh GRKERNSEC\033[m\n\n" "High GRKERNSEC," " <grsecurity config='high'" '"grsecurity": { "grsecurity_config":"high",'
elif $kconfig | grep -qi 'CONFIG_GRKERNSEC_MEDIUM=y'; then
echo_message "\033[33mMedium GRKERNSEC\033[m\n\n" "Medium GRKERNSEC," " <grsecurity config='medium'" '"grsecurity": { "grsecurity_config":"medium",'
elif $kconfig | grep -qi 'CONFIG_GRKERNSEC_LOW=y'; then
echo_message "\033[31mLow GRKERNSEC\033[m\n\n" "Low GRKERNSEC," " <grsecurity config='low'" '"grsecurity": { "grsecurity_config":"low",'
elif $kconfig | grep -qi 'CONFIG_GRKERNSEC_CONFIG_AUTO=y'; then
echo_message "\033[33mAuto GRKERNSEC\033[m\n\n" "Auto GRKERNSEC," " <grsecurity config='auto'" '"grsecurity": { "grsecurity_config":"auto",'
elif $kconfig | grep -qi 'CONFIG_GRKERNSEC_CONFIG_CUSTOM=y'; then
echo_message "\033[33mCustom GRKERNSEC\033[m\n\n" "Custom GRKERNSEC," " <grsecurity config='custom'" '"grsecurity": { "grsecurity_config":"custom",'
else
echo_message "\033[33mCustom GRKERNSEC\033[m\n\n" "Custom GRKERNSEC," " <grsecurity config='custom'" '"grsecurity": { "grsecurity_config":"custom",'
fi
echo_message " Non-executable kernel pages: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_KERNEXEC=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_kernexec='yes'" '"config_pax_kernexec":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_kernexec='no'" '"config_pax_kernexec":"no",'
fi
echo_message " Non-executable pages: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_NOEXEC=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_noexec='yes'" '"config_pax_noexec":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_noexec='no'" '"config_pax_noexec":"no",'
fi
echo_message " Paging Based Non-executable pages: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_PAGEEXEC=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_pageexec='yes'" '"config_pax_pageexec":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_pageexec='no'" '"config_pax_pageexec":"no",'
fi
echo_message " Restrict MPROTECT: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_MPROTECT=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_mprotect='yes'" '"config_pax_mprotect":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_mprotect='no'" '"config_pax_mprotect":"no",'
fi
echo_message " Address Space Layout Randomization: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_ASLR=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_aslr='yes'" '"config_pax_aslr":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_aslr='no'" '"config_pax_aslr":"no",'
fi
echo_message " Randomize Kernel Stack: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_RANDKSTACK=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_randkstack='yes'" '"config_pax_randkstack":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_randkstack='no'" '"config_pax_randkstack":"no",'
fi
echo_message " Randomize User Stack: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_RANDUSTACK=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_randustack='yes'" '"config_pax_randustack":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_randustack='no'" '"config_pax_randustack":"no",'
fi
echo_message " Randomize MMAP Stack: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_RANDMMAP=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_randmmap='yes'" '"config_pax_randmmap":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_randmmap='no'" '"config_pax_randmmap":"no",'
fi
echo_message " Sanitize freed memory: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_MEMORY_SANITIZE=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_memory_sanitize='yes'" '"config_pax_memory_sanitize":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_memory_sanitize='no'" '"config_pax_memory_sanitize":"no",'
fi
echo_message " Sanitize Kernel Stack: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_MEMORY_STACKLEAK=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_memory_stackleak='yes'" '"config_pax_memory_stackleak":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_memory_stackleak='no'" '"config_pax_memory_stackleak":"no",'
fi
echo_message " Prevent userspace pointer deref: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_MEMORY_UDEREF=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_memory_uderef='yes'" '"config_pax_memory_uderef":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_memory_uderef='no'" '"config_pax_memory_uderef":"no",'
fi
echo_message " Prevent kobject refcount overflow: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_REFCOUNT=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_refcount='yes'" '"config_pax_refcount":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_refcount='no'" '"config_pax_refcount":"yes",'
fi
echo_message " Bounds check heap object copies: " "" "" ""
if $kconfig | grep -qi 'CONFIG_PAX_USERCOPY=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_pax_usercopy='yes'" '"config_pax_usercopy":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_pax_usercopy='no'" '"config_pax_usercopy":"no",'
fi
echo_message " JIT Hardening: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_JIT_HARDEN=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_jit_harden='yes'" '"config_grkernsec_jit_harden":"yes",'
else
if $kconfig | grep -qi 'CONFIG_BPF_JIT=y'; then
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_jit_harden='no'" '"config_grkernsec_jit_harden":"no",'
else
echo_message "\033[32mNo BPF JIT\033[m\n" "No BPF JIT," " config_bpf_jit='no'" '"config_bpf_jit":"no",'
fi
fi
echo_message " Thread Stack Random Gaps: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_RAND_THREADSTACK=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_rand_threadstack='yes'" '"config_grkernsec_rand_threadstack":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_rand_threadstack='no'" '"config_grkernsec_rand_threadstack":"no",'
fi
echo_message " Disable writing to kmem/mem/port: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_KMEM=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_kmem='yes'" '"config_grkernsec_kmem":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_kmem='no'" '"config_grkernsec_kmem":"no",'
fi
echo_message " Disable privileged I/O: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_IO=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_io='yes'" '"config_grkernsec_io":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_io='no'" '"config_grkernsec_io":"no",'
fi
echo_message " Harden module auto-loading: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_MODHARDEN=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_modharden='yes'" '"config_grkernsec_modharden":"yes",'
else
if $kconfig | grep -qi 'CONFIG_MODULES=y'; then
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_modharden='no'" '"config_grkernsec_modharden":"no",'
else
echo_message "\033[32mNo module support\033[m\n" "No module support, " " config_modules='no'" '"config_modules":"no",'
fi
fi
echo_message " Chroot Protection: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_CHROOT=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_chroot='yes'" '"config_grkernsec_chroot":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_chroot='no'" '"config_grkernsec_chroot":"no",'
fi
echo_message " Deter ptrace process snooping: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_HARDEN_PTRACE=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_harden_ptrace='yes'" '"config_grkernsec_harden_ptrace":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_harden_ptrace='no'" '"config_grkernsec_harden_ptrace":"no",'
fi
echo_message " Larger Entropy Pools: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_RANDNET=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_randnet='yes'" '"config_grkernsec_randnet":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_randnet='no'" '"config_grkernsec_randnet":"no",'
fi
echo_message " TCP/UDP Blackhole: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_BLACKHOLE=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_blackhole='yes'" '"config_grkernsec_blackhole":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_blackhole='no'" '"config_grkernsec_blackhole":"no",'
fi
echo_message " Deter Exploit Bruteforcing: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_BRUTE=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " config_grkernsec_brute='yes'" '"config_grkernsec_brute":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " config_grkernsec_brute='no'" '"config_grkernsec_brute":"no",'
fi
echo_message " Hide kernel symbols: " "" "" ""
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_HIDESYM=y'; then
echo_message "\033[32mEnabled\033[m\n" "Enabled" " config_grkernsec_hidesym='yes'" '"config_grkernsec_hidesym":"yes",'
else
echo_message "\033[31mDisabled\033[m\n" "Disabled" " config_grkernsec_hidesym='no'" '"config_grkernsec_hidesym":"no",'
fi
echo_message " Pax softmode: " "" "" ""
paxsoft=$(sysctl -b -e kernel.pax.softmode)
if [[ "x$paxsoft" == "x1" ]]; then
echo_message "\033[31mEnabled\033[m\n" "Enabled" " pax_softmode='yes'" '"pax_softmode":"yes" },'
else
echo_message "\033[32mDisabled\033[m\n" "Disabled" " pax_softmode='no'" '"pax_softmode":"no" },'
fi
if $kconfig | grep -qi 'CONFIG_GRKERNSEC_SYSCTL=y'; then
echo_message " Grsec sysctl options:\n" "" "" '"grsecurity_sysctl": {'
for command in audit_chdir audit_gid audit_group audit_mount audit_ptrace chroot_caps chroot_deny_bad_rename chroot_deny_chmod chroot_deny_chroot chroot_deny_fchdir chroot_deny_mknod chroot_deny_mount chroot_deny_pivot chroot_deny_shmat chroot_deny_sysctl chroot_deny_unix chroot_enforce_chdir chroot_execlog chroot_findtask chroot_restrict_nice consistent_setxid deny_new_usb deter_bruteforce disable_priv_io dmesg enforce_symlinksifowner exec_logging fifo_restrictions forkfail_logging grsec_lock harden_ipc harden_ptrace ip_blackhole lastack_retries linking_restrictions ptrace_readexec resource_logging romount_protect rwxmap_logging signal_logging socket_all socket_all_gid socket_client socket_client_gid socket_server socket_server_gid symlinkown_gid timechange_logging harden_tty tpe tpe_gid tpe_invert tpe_restrict_all; do
if [[ $(echo grsecurity.$command | wc -c) -gt 27 ]]; then
echo_message " grsecurity.$command:\t " "" "" ""
elif [[ $(echo grsecurity.$command | wc -c) -le 20 ]]; then
echo_message " grsecurity.$command:\t\t\t " "" "" ""
else
echo_message " grsecurity.$command:\t\t " "" "" ""
fi
grcheck=$(sysctl -b kernel.grsecurity.$command 2>/dev/null || echo $?)
if [[ "x$grcheck" != "x255" ]] && [[ "x$grcheck" != "x0" ]]; then
echo_message "\033[32mEnabled\033[m\n" "Enabled," " grsec_sysctl_$command='yes'" "\"grsec_sysctl_$command\":\"yes\""
else
echo_message "\033[31mDisabled\033[m\n" "Disabled," " grsec_sysctl_$command='no'" "\"grsec_sysctl_$command\":\"no\""
fi
if [[ "$command" == "tpe_restrict_all" ]]; then
echo_message "" "" "" " } }"
else
echo_message "" "" "" ","
fi
done
echo_message "" "" " />\n</kernel>\n" ""
fi
else
echo_message "\033[31mNo GRKERNSEC\033[m\n\n" "No GRKERNSEC,,,,,,,," " <grsecurity config='no' />\n</kernel>\n" '"grsecurity": { "grsecurity_config":"no" } }'
echo_message " The grsecurity / PaX patchset is available here:\n" "" "" ""
echo_message " http://grsecurity.net/\n" "" "" ""
fi
}
# --- FORTIFY_SOURCE subfunctions (start) ---
# is FORTIFY_SOURCE supported by libc?
FS_libc_check() {
$debug && echo "***function FS_libc_check"
echo_message "* FORTIFY_SOURCE support available (libc) : " "" ""
if [[ "${#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() {
$debug && echo "***function FS_binary_check"
echo_message "* Binary compiled with FORTIFY_SOURCE support: " "" "" ""
for ((FS_elem_functions=0; FS_elem_functions<${#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",'
exit 1
}
FS_comparison() {
$debug && echo "***function FS_comparison"
echo_message "\n" "" ""
echo_message " ------ EXECUTABLE-FILE ------- . -------- LIBC --------\n" "" "" ""
echo_message " Fortifiable library functions | Checked function names\n" "" "" ""
echo_message " -------------------------------------------------------\n" "" "" ""
$debug && echo -e "\n***function FS_comparison->FS_elem_libc"
for ((FS_elem_libc=0; FS_elem_libc<${#FS_chk_func_libc[@]}; FS_elem_libc++))
do
$debug && echo -e "\n***function FS_comparison->FS_elem_libc->FS_elem_functions"