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LinEnum.sh
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#!/bin/sh
#
# LinEnum.sh - Local Linux Enumeration & Privilege Escalation Script:
# a script to enumerate local information from a Linux host
#
# Author: @rebootuser (up to version 0.982)
# @filippolauria (from version 1.0)
# @cyberpingu (porting in POSIX shell)
#
###############
# variables
###############
ECHO=`which echo`
# version number
version="1.0"
# colored output vars
_reset="\033[0m"
_red="\033[1;31m"
_green="\033[1;32m"
_yellow="\033[1;33m"
_purple="\033[1;35m"
_cyan="\033[1;36m"
_gray="\033[1;37m"
_color_flag="--color=always"
# we use sed to colorize some output
_sed_red="\o033[1;31m&\o033[0m"
_sed_green="\o033[1;32m&\o033[0m"
_sed_yellow="\o033[1;33m&\o033[0m"
_sed_cyan="\o033[1;36m&\o033[0m"
# set the number of columns
_cols="`tput cols 2> /dev/null || $ECHO -n "120"`"
if [ "$_cols" -lt "120" ]; then _cols="120"; fi
###############
# utils
###############
# usage: print_title "color" "title"
print_title()
{
eval color_var='$'_"$1"
if [ "$color_var" ]; then _color="$color_var"; else _color="${_yellow}"; fi
if [ "$2" ]; then title="### $2 "; else title="#####"; fi
title_len=`$ECHO -n "$title" | wc -c`
half_cols=`expr "$_cols" / 2`
q=`expr "$half_cols" - "$title_len"`
$ECHO -n -e "${_color}$title"
printf '#%.0s' `seq 1 "$q"`
$ECHO -e "${_reset}\n"
}
# usage: render_text "category" "keyword" "value"
render_text()
{
case "$1" in
"info") bullet="[${_cyan}-${_reset}]"; keyword_color="${_cyan}"; value_color="";;
"danger") bullet="[${_red}!${_reset}]"; keyword_color="${_red}"; value_color="";;
"warning") bullet="[${_yellow}!${_reset}]"; keyword_color="${_yellow}"; value_color="";;
"success") bullet="[${_green}+${_reset}]"; keyword_color="${_green}"; value_color="";;
"hint") bullet="[${_purple}*${_reset}]"; keyword_color="${_purple}"; value_color="";;
*) bullet="[.]"; keyword_color=""; value_color="";;
esac
$ECHO -e -n "${_gray}$bullet${_reset} ${keyword_color}$2${_reset}"
if [ "$3" ]; then
lines=`$ECHO "$3" | wc -l`
$ECHO -e -n "${_gray}:${_reset}"
if [ "$lines" -le "1" ]; then
output="`$ECHO "$3" | sed 's,\n,,'`"
total_chars=`$ECHO "[.] $2: $output" | wc -c`
if [ "$total_chars" -le "$_cols" ]; then
first_char=" "
else
first_char="\n "
fi
else
first_char="\n"
fi
$ECHO -e "$first_char${value_color}$3${_reset}\n"
else $ECHO -e "\n"; fi
}
print_ls_lh()
{
if [ "$1" ]; then
if [ "`($ECHO "$1" | wc -l) 2> /dev/null`" -le "$max_listable_files" ]; then
args="$1"
else
args="`($ECHO "$1" | head -n${max_listable_files}) 2> /dev/null`"
$ECHO "${_yellow}... (only $max_listable_files entries shown)${_reset}"
fi
OLD_IFS=$IFS; IFS='
'
find $args -exec ls -lh ${_color_flag} {} + 2> /dev/null
IFS=$OLD_IFS
fi
}
banner()
{
if [ "$quiet" ]; then
$ECHO
else
print_title "red"
$ECHO -e "${_yellow} _ ______
| | (o) | ____|
| | _ _ __ | |__ _ __ _ _ _ __ ___
| | | | \`_ \\| __| | \`_ \\| | | | '_ \` _ \\
| |____| | | | | |____| | | | |_| | | | | | |
|______|_|_| |_|______|_| |_|\\__,_|_| |_| |_| v${_yellow}$version
${_reset}
Local Linux Enumeration & Privilege Escalation Script
"
print_title "red"
fi
}
usage ()
{
banner
$ECHO -e "USAGE:
./LinEnum.sh -qCst -k <keyword> -r <report name> -e <export location> -h
OPTIONS:
-q Quiet mode
-C Disable colored output
-s Supply user password for sudo checks (INSECURE)
-t Include thorough (lengthy) tests
-k Enter keyword
-r Enter report name
-e Enter export location
-h Displays this help text
${_yellow}Running with no options = limited scans/no output file${_reset}
EXAMPLE:
./LinEnum.sh -t -k password -r report -e /tmp/
"
print_title "red"
}
common()
{
render_text "hint" "Please wait while the scan is starting..."
# maximum number of files listable
max_listable_files=70
# useful binaries (thanks to https://gtfobins.github.io/)
# update this list with:
# wget -q -O- https://gtfobins.github.io/ | grep -o 'bin-name">.*</a>' | sed 's,^.*">\(.*\)</a>,\1,g' | sed ':a;N;$!ba;s,\n,\\|,g'
interesting_binaries='ansible-playbook\|apt-get\|apt\|ar\|aria2c\|arj\|arp\|as\|ash\|at\|atobm\|awk\|base32\|base64\|basenc\|bash\|bpftrace\|bridge\|bundler\|busctl\|busybox\|byebug\|bzip2\|c89\|c99\|cancel\|capsh\|cat\|certbot\|check_by_ssh\|check_cups\|check_log\|check_memory\|check_raid\|check_ssl_cert\|check_statusfile\|chmod\|chown\|chroot\|cmp\|cobc\|column\|comm\|composer\|cowsay\|cowthink\|cp\|cpan\|cpio\|cpulimit\|crash\|crontab\|csh\|csplit\|csvtool\|cupsfilter\|curl\|cut\|dash\|date\|dd\|dialog\|diff\|dig\|dmesg\|dmidecode\|dmsetup\|dnf\|docker\|dosbox\|dpkg\|dvips\|easy_install\|eb\|ed\|emacs\|env\|eqn\|ex\|exiftool\|expand\|expect\|facter\|file\|find\|finger\|flock\|fmt\|fold\|ftp\|gawk\|gcc\|gcore\|gdb\|gem\|genisoimage\|ghc\|ghci\|gimp\|git\|grep\|gtester\|gzip\|hd\|head\|hexdump\|highlight\|hping3\|iconv\|iftop\|install\|ionice\|ip\|irb\|jjs\|join\|journalctl\|jq\|jrunscript\|knife\|ksh\|ksshell\|latex\|ld.so\|ldconfig\|less\|ln\|loginctl\|logsave\|look\|ltrace\|lua\|lualatex\|luatex\|lwp-download\|lwp-request\|mail\|make\|man\|mawk\|more\|mount\|msgattrib\|msgcat\|msgconv\|msgfilter\|msgmerge\|msguniq\|mtr\|mv\|mysql\|nano\|nasm\|nawk\|nc\|neofetch\|nice\|nl\|nmap\|node\|nohup\|npm\|nroff\|nsenter\|octave\|od\|openssl\|openvpn\|openvt\|paste\|pdb\|pdflatex\|pdftex\|perf\|perl\|pg\|php\|pic\|pico\|pip\|pkexec\|pkg\|pr\|pry\|psql\|puppet\|python\|rake\|readelf\|red\|redcarpet\|restic\|rev\|rlogin\|rlwrap\|rpm\|rpmquery\|rsync\|ruby\|run-mailcap\|run-parts\|rview\|rvim\|scp\|screen\|script\|sed\|service\|setarch\|sftp\|sg\|shuf\|slsh\|smbclient\|snap\|socat\|soelim\|sort\|split\|sqlite3\|ss\|ssh-keygen\|ssh-keyscan\|ssh\|start-stop-daemon\|stdbuf\|strace\|strings\|su\|sysctl\|systemctl\|systemd-resolve\|tac\|tail\|tar\|taskset\|tbl\|tclsh\|tcpdump\|tee\|telnet\|tex\|tftp\|tic\|time\|timedatectl\|timeout\|tmux\|top\|troff\|tshark\|ul\|unexpand\|uniq\|unshare\|update-alternatives\|uudecode\|uuencode\|valgrind\|vi\|view\|vigr\|vim\|vimdiff\|vipw\|virsh\|watch\|wc\|wget\|whiptail\|whois\|wish\|xargs\|xelatex\|xetex\|xmodmap\|xmore\|xxd\|xz\|yarn\|yelp\|yum\|zip\|zsh\|zsoelim\|zypper'
# exploitable kernel versions
# update this list with:
# wget -q -O- https://raw.githubusercontent.com/lucyoa/kernel-exploits/master/README.md | grep "Kernels:\s\+" | sed 's,Kernels:\s\+\(.*\)$,\1,g' | tr -d ',' | tr ' ' '\n' | sort -u -r | sed ':a;N;$!ba;s,\n,\\|,g'
vulnerable_kernels='3.9.6\|3.9.0\|3.9\|3.8.9\|3.8.8\|3.8.7\|3.8.6\|3.8.5\|3.8.4\|3.8.3\|3.8.2\|3.8.1\|3.8.0\|3.8\|3.7.6\|3.7.0\|3.7\|3.6.0\|3.6\|3.5.0\|3.5\|3.4.9\|3.4.8\|3.4.6\|3.4.5\|3.4.4\|3.4.3\|3.4.2\|3.4.1\|3.4.0\|3.4\|3.3\|3.2\|3.19.0\|3.16.0\|3.15\|3.14\|3.13.1\|3.13.0\|3.13\|3.12.0\|3.12\|3.11.0\|3.11\|3.10.6\|3.10.0\|3.10\|3.1.0\|3.0.6\|3.0.5\|3.0.4\|3.0.3\|3.0.2\|3.0.1\|3.0.0\|2.6.9\|2.6.8\|2.6.7\|2.6.6\|2.6.5\|2.6.4\|2.6.39\|2.6.38\|2.6.37\|2.6.36\|2.6.35\|2.6.34\|2.6.33\|2.6.32\|2.6.31\|2.6.30\|2.6.3\|2.6.29\|2.6.28\|2.6.27\|2.6.26\|2.6.25\|2.6.24.1\|2.6.24\|2.6.23\|2.6.22\|2.6.21\|2.6.20\|2.6.2\|2.6.19\|2.6.18\|2.6.17\|2.6.16\|2.6.15\|2.6.14\|2.6.13\|2.6.12\|2.6.11\|2.6.10\|2.6.1\|2.6.0\|2.4.9\|2.4.8\|2.4.7\|2.4.6\|2.4.5\|2.4.4\|2.4.37\|2.4.36\|2.4.35\|2.4.34\|2.4.33\|2.4.32\|2.4.31\|2.4.30\|2.4.29\|2.4.28\|2.4.27\|2.4.26\|2.4.25\|2.4.24\|2.4.23\|2.4.22\|2.4.21\|2.4.20\|2.4.19\|2.4.18\|2.4.17\|2.4.16\|2.4.15\|2.4.14\|2.4.13\|2.4.12\|2.4.11\|2.4.10\|2.2.24'
# vulnerable sudo versions
vulnerable_sudo='1\.\([0-7]\.[0-9]\+\|8\.\(1[0-9]*\|2[0-7]\)\)'
# interesting groups
interesting_groups="root\|sudo\|shadow\|adm\|wheel\|staff\|lxd\|lxc\|docker"
# interesting sudo keywords
interesting_sudo="env_keep+=LD_PRELOAD\|(\?ALL\s\?\(:\s\?ALL\)\?)\?\|NOPASSWD"
# interesting parts of variable names
interesting_varnames="USER\|ACCESS\|ID\|API\|SECRET\|TOKEN\|KEY\|CLIENT\|EMAIL\|AUTH\|PASS\|PW\|HASH\|DATABASE\|DEPLOY\|GPG\|ACCOUNT\|SID\|BUCKET\|PRIVATE\|GIT\|ENV\|SVN\|SSH\|LOG\|DEV"
# caching /etc/passwd content
etc_passwd_cache=`grep -v '^#\|^$' /etc/passwd`
# save all users in the users variable
users=`($ECHO "$etc_passwd_cache" | cut -d":" -f1) 2> /dev/null`
# my (current user) information
my_id=`(id || (groups | cut -d":" -f2)) 2> /dev/null`
my_username=`whoami 2> /dev/null`
my_homedir=`($ECHO "$etc_passwd_cache" | grep "^$my_username" | cut -d":" -f6) 2> /dev/null`
# writable folders
writable_folders="`find / -type d -writable \! \( -path "/proc/*" -o -path "/sys/*" \) 2> /dev/null`"
#PATH manipulation: in debian some directory (e.g. /sbin or /usr/sbin) is not added to the path
# this manipulation adds some known dir to the path, if it exists on the system
OLD_PATH=$PATH
known_good_path_dirs="/usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin /usr/games /usr/local/games /snap/bin"
path_manipulated=0
OLD_IFS=$IFS
IFS='
'
for d in $known_good_path_dirs; do
#if [[ -d "$d" ]] && [[ ! "$PATH" =~ $d ]]; then
# PATH="$PATH:$d"
# path_manipulated=1
#fi
if [ -d "$d" ]; then
#if ! "$PATH" | grep -Eq "$d" ; then
if ! printf "%s" "$PATH" | grep -q "$d"; then
PATH="$PATH:$d"
path_manipulated=1
fi
fi
done
IFS=$OLD_IFS
if [ "$path_manipulated" = "1" ]; then
render_text "warning" "Path changed to: $PATH"
fi
}
###############
# checks
###############
script_info()
{
print_title "yellow" "INFO"
if [ "$keyword" ]; then
render_text "info" "Searching for the following keyword in conf, php, ini and log files" "$keyword"
fi
if [ "$report" ]; then render_text "info" "Report name" "$report"; fi
if [ "$export" ]; then render_text "info" "Export location" "$export"; fi
render_text "info" "Thorough tests" "`if [ "$thorough" ]; then $ECHO -n "Enabled"; else $ECHO -n "Disabled"; fi`"
# prepare to export findings
if [ "$export" ]; then
mkdir "$export" 2> /dev/null
format=$export/LinEnum-export-`date +"%d-%m-%y"`
mkdir "$format" 2> /dev/null
fi
# prepare password
if [ "$sudopass" ]; then
render_text "warning" "Please enter password - INSECURE - really only for CTF use!"
# read -s -r userpassword
read -r userpassword
$ECHO
fi
}
system_info()
{
print_title "yellow" "SYSTEM INFO"
# basic kernel info
unameinfo=`(uname -a | sed "s,\s\+\($vulnerable_kernels\),${_sed_red},g") 2> /dev/null`
if [ "$unameinfo" ]; then
render_text "info" "Kernel information" "$unameinfo"
fi
# kernel info
procver=`sed "s,\s\+\($vulnerable_kernels\),${_sed_red},g" /proc/version 2> /dev/null`
if [ "$procver" ]; then
render_text "info" "Kernel information (continued)" "$procver"
fi
if (uname -a || cat /proc/version) | grep -q "\s\+\($vulnerable_kernels\)" 2> /dev/null; then
render_text "hint" "It looks like we have an unpatched kernel" "Use '${_red}searchsploit `uname -s` Kernel `uname -r | cut -d'.' -f1-2`${_reset}' to look for kernel exploits"
fi
# search all *-release files for version info
release=`cat /etc/*-release 2> /dev/null`
if [ "$release" ]; then
render_text "info" "Specific release information" "$release"
fi
# target hostname info
hostnamed=`hostname 2> /dev/null`
if [ "$hostnamed" ]; then
render_text "info" "Hostname" "$hostnamed"
fi
# memory
freeinfo=`free -h 2> /dev/null`
if [ "$freeinfo" ]; then
render_text "info" "Free and used memory in the system" "$freeinfo"
fi
# disk
dfinfo=`(df -h || lsblk) 2> /dev/null`
if [ "$dfinfo" ]; then
render_text "info" "Disk space usage" "$dfinfo"
fi
# cpu
cpuinfo=`lscpu 2> /dev/null`
if [ "$cpuinfo" ]; then
render_text "info" "CPU architecture" "$cpuinfo"
fi
# printers
printersinfo=`lpstat -a 2>/dev/null`
if [ "$printersinfo" ]; then
render_text "info" "Printer(s)" "$printersinfo"
fi
}
user_info()
{
# if we have to export something, we prepare the destination directory
if [ "$export" ]; then
mkdir "$format/etc-export/" 2> /dev/null
fi
print_title "yellow" "USER/GROUP"
#current user details
render_text "info" "Current user/group info" \
"`($ECHO "$my_id" | sed "s,\((\|\s\)\($interesting_groups\)\()\|\s\),${_sed_cyan},g") 2> /dev/null`"
#last logged on user information
lastlogedonusrs=`(lastlog | awk "NR>1" | grep -v "Never") 2> /dev/null`
if [ "$lastlogedonusrs" ]; then
render_text "info" "Users that have previously logged onto the system" "$lastlogedonusrs"
fi
#who else is logged on
loggedonusrs=`w 2> /dev/null`
if [ "`$ECHO "$loggedonusrs" | wc -l`" -gt "1" ]; then
render_text "info" "Who else is logged on" "$loggedonusrs"
fi
#lists all id's and respective group(s)
grpinfo=""
for u in $users; do
idoutput=`( (id "$u" || (groups "$u" | cut -d":" -f2) ) | sed "s,\((\|\s\)\($interesting_groups\)\()\|\s\),${_sed_yellow},g") 2> /dev/null`
entry="${_cyan}$u${_reset} : $idoutput"
# we concatenate or init the list of processes
if [ "$grpinfo" ]; then grpinfo="$grpinfo"'
'"$entry"; else grpinfo="$entry"; fi
done
if [ "$grpinfo" ]; then
render_text "info" "Group memberships" "$grpinfo"
fi
#checks to see if any hashes are stored in /etc/passwd (deprecated *nix storage method)
hashesinpasswd=`($ECHO "$etc_passwd_cache" | grep -v '^[^:]\+:[^:]\?:') 2> /dev/null`
if [ "$hashesinpasswd" ]; then
render_text "danger" "It looks like we have password hashes in /etc/passwd" "$hashesinpasswd"
fi
#checks to see if there are empty password fields in /etc/passwd
emptypassfield=`($ECHO "$etc_passwd_cache" | grep '^[^:]\+::') 2> /dev/null`
if [ "$emptypassfield" ]; then
render_text "danger" "It looks like we have a user with an empty password field in /etc/passwd" "$emptypassfield"
fi
#contents of /etc/passwd
readpasswd=`($ECHO "$etc_passwd_cache" | sed "s/.*sh$/${_sed_yellow}/") 2> /dev/null`
if [ "$readpasswd" ]; then
render_text "info" "Contents of /etc/passwd" "$readpasswd"
if [ "$export" ]; then cp /etc/passwd "$format/etc-export/passwd" 2> /dev/null; fi
fi
#checks to see if the shadow file can be read
readshadow=`cat /etc/shadow 2> /dev/null`
if [ "$readshadow" ]; then
render_text "danger" "We can read the shadow file" "$readshadow"
if [ "$export" ]; then cp /etc/shadow "$format/etc-export/shadow" 2> /dev/null; fi
fi
#checks to see if /etc/master.passwd can be read - BSD 'shadow' variant
readmasterpasswd=`cat /etc/master.passwd 2> /dev/null`
if [ "$readmasterpasswd" ]; then
render_text "danger" "We can read the master.passwd file" "$readmasterpasswd"
if [ "$export" ]; then cp /etc/master.passwd "$format/etc-export/master.passwd" 2> /dev/null; fi
fi
#all root accounts (uid 0)
superman=`($ECHO "$etc_passwd_cache" | awk -F':' '$3 == 0 {print $1}') 2> /dev/null`
if [ "$superman" ]; then
render_text "warning" "Super user account(s)" "$superman"
fi
# we proceed with sudo checks, only if we can get the sudo binary path
sudobin=`command -v sudo 2> /dev/null`
if [ "$sudobin" ]; then
# we get /etc/sudoers content,
# strip out comments and empty lines
# and highlight interesting keywords
sudoers=`grep -v '^#\|^$' /etc/sudoers 2> /dev/null`
if [ "$sudoers" ]; then
sudoers=`($ECHO "$sudoers" | sed "s,$interesting_sudo,${_sed_red},g" | sed "s,\($interesting_binaries\)\s\+,${_sed_yellow},g") 2> /dev/null`
render_text "warning" "We can read /etc/sudoers" "$sudoers"
if [ "$export" ]; then cp /etc/sudoers "$format/etc-export/sudoers" 2> /dev/null; fi
fi
# check if we can sudo without password
sudoperms=`($ECHO '' | sudo -S -l -k) 2> /dev/null`
if [ "$sudoperms" ]; then
sudoperms=`($ECHO "$sudoperms" | sed "s,$interesting_sudo,${_sed_red},g" | sed "s,\($interesting_binaries\)\s\+,${_sed_yellow},g") 2> /dev/null`
render_text "danger" "We can 'sudo -l' without supplying a password" "$sudoperms"
else
if [ "$sudopass" ]; then
# check if we can sudo with password
sudoauth=`($ECHO "$userpassword" | sudo -S -l -k) 2> /dev/null`
if [ "$sudoauth" ]; then
sudoauth=`($ECHO "$sudoauth" | sed "s,$interesting_sudo,${_sed_red},g" | sed "s,\($interesting_binaries\)\s\+,${_sed_yellow},g") 2> /dev/null`
render_text "danger" "We can sudo when supplying a password" "$sudoauth"
fi
fi
fi
# check for writable/readable files in /etc/sudoers.d
sudoersd=`find /etc/sudoers.d \! -name README -type f -exec ls ${_color_flag} -lah {} + 2> /dev/null`
if [ "$sudoersd" ]; then
render_text "danger" "Check if we can read/write files in /etc/sudoers.d" "$sudoersd"
if [ "$export" ]; then
mkdir -p "$format/etc-export/sudoers.d/" 2> /dev/null
cp /etc/sudoers.d/* "$format/etc-export/sudoers.d/" 2> /dev/null
fi
fi
# who has sudoed in the past
sudoerhomelist="`(find /home -name .sudo_as_admin_successful -type f -exec dirname {} + | sort -u) 2> /dev/null`"
if [ "$sudoerhomelist" ]; then
sudoerslist=""
for h in $sudoerhomelist; do
entry=`(ls -dl "$h" | awk 'NR==1 {print $3}') 2> /dev/null`
if [ "$sudoerslist" ]; then sudoerslist="$sudoerslist"'
'"$entry"; else sudoerslist="$entry"; fi
done
if [ "$sudoerslist" ]; then
render_text "info" "Users that have recently used sudo" "$sudoerslist"
fi
fi
fi
#checks to see if roots home directory is accessible
rthmdir=`ls ${_color_flag} -lah /root/ 2> /dev/null`
if [ "$rthmdir" ]; then
render_text "danger" "We can read root's home directory" "$rthmdir"
fi
#displays /home directory permissions - check if any are lax
homedirperms=`ls ${_color_flag} -lah /home/ 2> /dev/null`
if [ "$homedirperms" ]; then
render_text "info" "Check if permissions on /home directories are lax" "$homedirperms"
fi
# we proceed with ssh checks, only if we can read /etc/ssh/sshd_config
if [ -r "/etc/ssh/sshd_config" ]; then
ssh_interesting_keywords="PubkeyAuthentication\|AuthenticationMethods\|PermitRootLogin\|PermitEmptyPasswords\|AllowUsers\|DenyUsers"
sshdchecks="`(grep -v '^#\|^$' /etc/ssh/sshd_config | sed "s,\($ssh_interesting_keywords\)\s\+,${_sed_yellow},g") 2> /dev/null`"
if [ "$sshdchecks" ]; then
render_text "info" "Check SSH daemon configuration (condensed)" "$sshdchecks"
fi
if [ "$export" ]; then cp /etc/ssh/sshd_config "$format/etc-export/" 2> /dev/null; fi
fi
#thorough checks
if [ "$thorough" = "1" ]; then
#looks for files we can write to but that don't belong to us
grfilesall=`find / -writable \! -user "$my_username" -type f \! \( -path "/proc/*" -o -path "/sys/*" \) 2> /dev/null`
if [ "$grfilesall" ]; then
render_text "info" "File(s) not owned by our user ($my_username) but writable" "`print_ls_lh "$grfilesall"`"
fi
#looks for files that belong to us
ourfilesall=`find / -user "$my_username" -type f \! \( -path "/proc/*" -o -path "/sys/*" \) 2> /dev/null`
if [ "$ourfilesall" ]; then
render_text "info" "File(s) owned by our user ($my_username)" "`print_ls_lh "$ourfilesall"`"
fi
#looks for hidden files
hiddenfiles=`find / -name ".*" -type f \! \( -path "/proc/*" -o -path "/sys/*" \) 2> /dev/null`
if [ "$hiddenfiles" ]; then
render_text "warning" "Hidden files" "`print_ls_lh "$hiddenfiles"`"
fi
# looks for world-reabable files within /home
wrfilesinhome=`find /home/ -readable -type f 2> /dev/null`
if [ "$wrfilesinhome" ]; then
render_text "warning" "World-readable files within /home" "`print_ls_lh "$wrfilesinhome"`"
if [ "$export" ]; then
mkdir "$format/wr-files/" 2> /dev/null
OLD_IFS=$IFS; IFS='
'
for f in $wrfilesinhome; do cp --parents "$f" "$format/wr-files/"; done 2> /dev/null
IFS=$OLD_IFS
fi
fi
# lists current user's home directory contents
homedircontents=`ls ${_color_flag} -Rlah "$my_homedir" 2> /dev/null`
if [ "$homedircontents" ] ; then
render_text "info" "Home directory contents" "$homedircontents"
fi
# checks for if various ssh files (or their backups) are accessible
sshfiles=`find / \( -name "id_dsa*" -o -name "id_rsa*" -o -name "known_hosts*" -o -name "authorized_hosts*" -o -name "authorized_keys*" \) -type f 2> /dev/null`
if [ "$sshfiles" ]; then
render_text "warning" "SSH keys/host information found in the following locations" "`print_ls_lh "$sshfiles"`"
if [ "$export" ]; then
mkdir "$format/ssh-files/" 2> /dev/null
OLD_IFS=$IFS; IFS='
'
for f in $sshfiles; do cp --parents "$f" "$format/ssh-files/"; done 2> /dev/null
IFS=$OLD_IFS
fi
fi
fi
}
environmental_info()
{
print_title "yellow" "ENVIRONMENT"
# env information (we try to highlight useful variables)
envinfo=`( (env || set) | grep -v '^LS_COLORS=' | sed "s,^.*\($interesting_varnames\).*=,${_sed_yellow},Ig" ) 2> /dev/null`
if [ "$envinfo" ]; then
render_text "info" "Environment information" "$envinfo"
fi
# check if apparmor is present
apparmor=`aa-status 2> /dev/null`
if [ -z "$apparmor" ]; then
apparmor=`apparmor_status 2> /dev/null`
fi
if [ "$apparmor" ]; then
render_text "warning" "AppArmor seems to be present" "$apparmor"
apparmorls=`ls -dlah /etc/apparmor* 2> /dev/null`
if [ "$apparmorls" ]; then
render_text "info" "AppArmor dir(s)" "$apparmorls"
fi
fi
# check if selinux is present
sestatus=`sestatus 2> /dev/null`
if [ "$sestatus" ]; then
render_text "info" "SELinux seems to be present" "$sestatus"
fi
# ASLR check
aslr_enabled=`cat /proc/sys/kernel/randomize_va_space 2> /dev/null`
render_text "warning" "ASLR status" "`if [ "$aslr_enabled" -eq "0" ]; then $ECHO "disabled"; else $ECHO "enabled"; fi`"
#current path configuration
if [ "$OLD_PATH" ]; then
render_text "info" "PATH" "$OLD_PATH"
# check if some writable folder is in the PATH
wr_folder_in_path="";
OLD_IFS=$IFS
IFS='
'
for d in $writable_folders; do
# if [[ -d "$d" ]] && [[ ! -L "$d" ]] && [[ "$OLD_PATH" =~ $d ]]; then
# if [ "$wr_folder_in_path" ]; then wr_folder_in_path="$wr_folder_in_path\|$d"; else wr_folder_in_path="$d"; fi
# fi
if [ -d "$d" ]; then
if [ ! -L "$d" ]; then
BOOL=$(printf "%s" "$OLD_PATH" | grep -q "$d")
if [ -d "$BOOL" ]; then
if [ "$wr_folder_in_path" ]; then wr_folder_in_path="$wr_folder_in_path\|$d"; else wr_folder_in_path="$d"; fi
fi
fi
fi
done
IFS=$OLD_IFS
PATH_W_SPACES=`$ECHO "$OLD_PATH" | tr ':' ' '`
pathswriteable=`(ls -dlah $PATH_W_SPACES | sed "s,$wr_folder_in_path,${_sed_green},g") 2> /dev/null`
if [ "$pathswriteable" ]; then
render_text "warning" "Check if some folder of the PATH is ${_green}writable" "$pathswriteable"
fi
fi
#lists available shells
etc_shells_content=`grep -v '^#\|^$' /etc/shells 2> /dev/null`
shellinfo=`print_ls_lh "$etc_shells_content"`
if [ "$shellinfo" ]; then
render_text "info" "Available shells as specified in /etc/shells" "$shellinfo"
fi
#current umask value with both octal and symbolic output
umaskvalue=`umask -S 2> /dev/null & umask 2> /dev/null`
if [ "$umaskvalue" ]; then
render_text "info" "Current umask value" "$umaskvalue"
fi
if [ -f "/etc/login.defs" ]; then
#umask value as in /etc/login.defs
umaskdef=`(grep -i "^UMASK" /etc/login.defs | sed -E 's/\s+/ /') 2> /dev/null`
if [ "$umaskdef" ]; then
render_text "info" "umask value as specified in /etc/login.defs" "$umaskdef"
fi
#password policy information as stored in /etc/login.defs
logindefs=`grep ${_color_flag} "^PASS_MAX_DAYS\|^PASS_MIN_DAYS\|^PASS_WARN_AGE\|^ENCRYPT_METHOD" /etc/login.defs 2> /dev/null`
if [ "$logindefs" ]; then
render_text "info" "Password and storage information" "$logindefs"
if [ "$export" ]; then
mkdir "$format/etc-export/" 2> /dev/null
cp /etc/login.defs "$format/etc-export/login.defs" 2> /dev/null
fi
fi
fi
#In-memory passwords
inmemorypassword=`strings /dev/mem -n10 2> /dev/null | grep ${_color_flag} -i PASS`
if [ "$inmemorypassword" ]; then
render_text "danger" "In-memory passwords" "$inmemorypassword"
fi
}
job_info()
{
print_title "yellow" "JOBS/TASKS"
# caching all automated jobs/tasks files
automated_jobs=`find /etc/cron* /etc/anacron* /etc/at* /var/spool/anacron /var/spool/cron/crontabs \! -name ".placeholder" -type f 2> /dev/null`
if [ "$automated_jobs" ]; then
# showing jobs files
render_text "info" "Automated jobs/tasks files" "`print_ls_lh "$automated_jobs"`"
fi
if [ "$thorough" ] && [ -z "$automated_jobs" ]; then
effective_automated_jobs=$automated_jobs
else
effective_automated_jobs="/etc/crontab"'
'"/etc/anacrontab"'
'
fi
if [ "$effective_automated_jobs" ]; then
automated_jobs_output=""
writable_jobs=""
jobs_with_path=""
OLD_IFS=$IFS
IFS='
'
# showing jobs content
for f in $effective_automated_jobs; do
automated_job_output=`grep -v '^#\|^$' "$f" 2> /dev/null`
if [ "$automated_job_output" ]; then
render_text "info" "$f content (condensed)" "$automated_job_output"
fi
done
for f in $automated_jobs; do
# update writable jobs
writable_job="`find "$f" -writable 2> /dev/null`"
if [ "$writable_jobs" ]; then writable_jobs="$writable_jobs"'
'"$writable_job"; else writable_jobs="$writable_job"; fi
# update jobs with PATH
path="`(grep '^PATH=' "$f" | sed 's,^PATH=,,' | tr ':' '\n') 2> /dev/null`"
if [ "$path" ]; then
wr_folder_in_path="";
for d in $path; do
#if [[ -d "$d" ]] && [[ ! -L "$d" ]] && [[ "$writable_folders" =~ $d ]]; then
if [ -d "$d" ]; then
if [ ! -L "$d" ]; then
BOOL=$(printf "%s" "$writable_folders"|grep -q "$d")
if [ -d "$BOOL" ]; then
if [ "$wr_folder_in_path" ]; then wr_folder_in_path="$wr_folder_in_path\|$d"; else wr_folder_in_path="$d"; fi
fi
fi
fi
done
if [ "$wr_folder_in_path" ]; then
job_with_path="`( (ls ${_color_flag} -lah "$f"; $ECHO; sed "s,\([=:]\($wr_folder_in_path\)\)\+,${_sed_green},g" "$f"; $ECHO) | sed "s,$f,${_sed_cyan},g" ) 2> /dev/null`"
if [ "$jobs_with_path" ]; then jobs_with_path="$jobs_with_path"'
'"$job_with_path"; else jobs_with_path="$job_with_path"; fi
fi
fi
done
IFS=$OLD_IFS
# show writable job files
if [ "$writable_jobs" ]; then
render_text "warning" "It looks that we can manipulate some automated job/task" "`print_ls_lh "$writable_jobs"`"
fi
# show writable folder in PATHs
if [ "$jobs_with_path" ]; then
render_text "warning" "It looks that we have some writable folder in the job PATH" "$jobs_with_path"
fi
fi
#see if any users have associated cronjobs (priv command)
for u in $users; do
cronother=`crontab -l -u "$u" 2> /dev/null`
if [ "$cronother" ]; then
render_text "warning" "Jobs held by $u" "$cronother"
fi
done
# list systemd timers
if [ "$thorough" = "1" ]; then
# include inactive timers in thorough mode
systemdtimers=`systemctl list-timers --all 2> /dev/null`
else
systemdtimers=`systemctl list-timers 2> /dev/null | head -n -1 2> /dev/null`
fi
if [ "$systemdtimers" ]; then
render_text "info" "Systemd timers" "$systemdtimers"
if [ "$thorough" != "1" ]; then
# replace the info in the output with a hint towards thorough mode
render_text "hint" "Enable thorough tests to see inactive timers"
fi
fi
}
networking_info()
{
print_title "yellow" "NETWORKING"
#nic information
nicinfo=`(ifconfig -a || /sbin/ifconfig -a) 2> /dev/null`
if [ "$nicinfo" ]; then
render_text "info" "Network and IP info" "$nicinfo"
else
#nic information (using ip)
nicinfoip=`(ip addr || /sbin/ip addr) 2> /dev/null`
if [ "$nicinfoip" ]; then
render_text "info" "Network and IP info" "$nicinfoip"
fi
fi
#arp information
arpinfo=`(arp -a || /usr/sbin/arp -a) 2> /dev/null`
if [ -z "$arpinfo" ]; then
#arp information (using ip)
arpinfo=`(ip neigh || /sbin/ip neigh) 2> /dev/null`
fi
if [ "$arpinfo" ]; then
render_text "info" "ARP history" "$arpinfo"
fi
#dns settings
nsinfo=`grep ${_color_flag} "nameserver" /etc/resolv.conf 2> /dev/null`
if [ "$nsinfo" ]; then
render_text "info" "Nameserver(s)" "$nsinfo"
fi
nsinfosysd=`systemd-resolve --status 2> /dev/null`
if [ "$nsinfosysd" ]; then
render_text "info" "Nameserver(s)" "$nsinfosysd"
fi
#default route configuration
defroute=`(route -n || /usr/sbin/route -n) 2> /dev/null | grep '^\(0.\?\)\{4\}'`
if [ -z "$defroute" ]; then
#default route configuration (using ip)
defroute=`(ip r || /sbin/ip r) 2> /dev/null | grep default`
fi
if [ "$defroute" ]; then
render_text "info" "Default route" "$defroute"
fi
#listening TCP
tcpserv=`(netstat -lntp | sed "s,127.0.0.1:[0-9]\+,${_sed_yellow},") 2> /dev/null`
if [ -z "$tcpserv" ]; then
#listening TCP (using ss)
tcpserv=`(ss -lntp | sed "s,127.0.0.1:[0-9]\+,${_sed_yellow},") 2> /dev/null`
fi
if [ "$tcpserv" ]; then
render_text "info" "Listening TCP" "$tcpserv"
fi
#listening UDP
udpserv=`netstat -lnup 2> /dev/null`
if [ "$udpserv" ]; then
#listening UDP (using ss)
udpserv=`ss -lnup 2> /dev/null`
fi
if [ "$udpserv" ]; then
render_text "info" "Listening UDP" "$udpserv"
fi
}
services_info()
{
print_title "yellow" "SERVICES"
#running processes
psaux=`ps aux 2> /dev/null`
if [ "$psaux" ]; then
render_text "info" "Running processes" "$psaux"
fi
#lookup process binary path and permissisons
psoutput=`(ps -eo command | grep -v "^\(\[\|COMMAND\|(\)" | awk '{print $1}' | awk '!x[$0]++') 2> /dev/null`
if [ "$psoutput" ]; then
proclist=""
OLD_IFS=$IFS; IFS='
'
for proc in $psoutput; do
procpath="`command -v -- $proc 2> /dev/null`"
if [ "$proclist" ]; then proclist="$proclist"'
'"$procpath"; else proclist="$procpath"; fi
done
IFS=$OLD_IFS
if [ "$proclist" ]; then
render_text "info" "Process binaries and associated permissions (from the above list)" "`ls ${_color_flag} -lah $proclist 2> /dev/null`"
if [ "$export" ]; then
mkdir "$format/ps-export/" 2> /dev/null
OLD_IFS=$IFS; IFS='
'
for binary in $proclist; do cp --parents "$binary" "$format/ps-export/"; done 2> /dev/null
IFS=$OLD_IFS
fi
fi
fi
#anything 'useful' in inetd.conf
inetdread=`grep -v '^#\|^$' /etc/inetd.conf 2> /dev/null`
if [ "$inetdread" ]; then
render_text "info" "Contents of /etc/inetd.conf (condensed)" "$inetdread"
if [ "$export" ]; then
mkdir "$format/etc-export/" 2> /dev/null
cp /etc/inetd.conf "$format/etc-export/inetd.conf" 2> /dev/null
fi
fi
#very 'rough' command to extract associated binaries from inetd.conf & show permisisons of each
inetdbinperms=`awk '{print $7}' /etc/inetd.conf 2> /dev/null`
if [ "$inetdbinperms" ]; then
render_text "info" "The related inetd binary permissions" "`print_ls_lh "$inetdbinperms"`"
fi
#check /etc/xinetd.conf file content
xinetdread=`grep -v '^#\|^$' /etc/xinetd.conf 2> /dev/null`
if [ "$xinetdread" ]; then
render_text "info" "Contents of /etc/xinetd.conf" "$xinetdread"
if [ "$export" ]; then
mkdir "$format/etc-export/" 2> /dev/null
cp /etc/xinetd.conf "$format/etc-export/xinetd.conf" 2> /dev/null
fi
fi
#check /etc/xinetd.d directory content
xinetdincd=`grep ${_color_flag} "/etc/xinetd.d" /etc/xinetd.conf 2> /dev/null`
if [ "$xinetdincd" ]; then
render_text "info" "/etc/xinetd.d is included in /etc/xinetd.conf - associated binary permissions are listed below" \
"`ls ${_color_flag} -lah /etc/xinetd.d 2> /dev/null`"
fi
#very 'rough' command to extract associated binaries from xinetd.conf & show permisisons of each
xinetdbinperms=`awk '{print $7}' /etc/xinetd.conf 2> /dev/null`
if [ "$xinetdbinperms" ]; then
render_text "info" "The related xinetd binary permissions" "`print_ls_lh "$xinetdbinperms"`"
fi
initdread=`ls ${_color_flag} -lah /etc/init.d 2> /dev/null`
if [ "$initdread" ]; then
render_text "info" "/etc/init.d/ binary permissions" "$initdread"
fi
#init.d files NOT belonging to root!
initdperms=`find /etc/init.d/ \! -uid 0 -type f 2> /dev/null`
if [ "$initdperms" ]; then
render_text "info" "/etc/init.d/ files not belonging to root" "`print_ls_lh "$initdperms"`"
fi
rcdread=`ls ${_color_flag} -la /etc/rc.d/init.d 2> /dev/null`
if [ "$rcdread" ]; then
render_text "info" "/etc/rc.d/init.d binary permissions" "$rcdread"
fi
#init.d files NOT belonging to root!
rcdperms=`find /etc/rc.d/init.d \! -uid 0 -type f 2> /dev/null`
if [ "$rcdperms" ]; then
render_text "danger" "/etc/rc.d/init.d files not belonging to root" "`print_ls_lh "$rcdperms"`"
fi
usrrcdread=`ls ${_color_flag} -lah /usr/local/etc/rc.d 2> /dev/null`
if [ "$usrrcdread" ]; then
render_text "info" "/usr/local/etc/rc.d binary permissions" "$usrrcdread"
fi
#rc.d files NOT belonging to root!
usrrcdperms=`find /usr/local/etc/rc.d \! -uid 0 -type f 2> /dev/null`
if [ "$usrrcdperms" ]; then
render_text "danger" "/usr/local/etc/rc.d files not belonging to root" "`print_ls_lh "$xinetdbinperms"`"
fi
initread=`ls ${_color_flag} -la /etc/init/ 2> /dev/null`
if [ "$initread" ]; then
render_text "info" "/etc/init/ config file permissions" "$initread"
fi
# upstart scripts not belonging to root
initperms=`find /etc/init \! -uid 0 -type f 2> /dev/null`
if [ "$initperms" ]; then
render_text "danger" "/etc/init/ config files not belonging to root" "`print_ls_lh "$initdperms"`"
fi
if [ "$thorough" = "1" ]; then
systemdread="`find /lib/systemd/ /etc/systemd/ -type f 2> /dev/null`";
systemdperms="`find /lib/systemd/ /etc/systemd/ \( \! -uid 0 -o -writable \) -type f 2> /dev/null`"
else
systemdread="`find /lib/systemd/ /etc/systemd/ -name "*.service" -type f 2> /dev/null`"
systemdperms="`find /lib/systemd/ /etc/systemd/ \( \! -uid 0 -o -writable \) -name "*.service" -type f 2> /dev/null`"
fi
# systemd files
if [ "$systemdread" ]; then
render_text "info" "systemd config file permissions" "`print_ls_lh "$systemdread"`"
fi
# systemd files not belonging to root or writable
if [ "$systemdperms" ]; then
render_text "danger" "systemd config files not belonging to root or writable" "`print_ls_lh "$systemdperms"`"
fi
}
software_configs()
{
print_title "yellow" "SOFTWARE"
#sudo version - check to see if there are any known vulnerabilities with this
sudover=`(sudo -V | head -n1 | cut -d' ' -f3) 2> /dev/null`
if [ "$sudover" ]; then
render_text "info" "Sudo version" "`$ECHO "$sudover" | sed "s,$vulnerable_sudo,${_sed_red},"`"
if $ECHO "$sudover" | grep -q "$vulnerable_sudo" 2> /dev/null; then
render_text "hint" "It looks like we have a vulnearble sudo version" "Use '${_red}searchsploit sudo $sudover${_reset}' to look for available exploits"
fi
fi
#exim4 details - if installed
exim4ver=`(exim4 --version | head -n1 | cut -d' ' -f3) 2> /dev/null`
if [ "$exim4ver" ]; then
render_text "info" "Exim4 version" "$exim4ver"
fi
#mysql details - if installed
mysqlver=`mysql --version 2> /dev/null`
if [ "$mysqlver" ]; then
render_text "info" "MYSQL version" "$mysqlver"
#checks to see if we can get very low MYSQL hanging fruits
mysql_usernames="root"
#if [[ ! "$mysql_usernames" =~ $my_username ]]; then mysql_usernames="$mysql_usernames"'
#'"$my_username"; fi
BOOL=$(printf "%s" "$mysql_usernames" | grep -q "$my_username")
if [ ! "$(BOOL)" ]; then mysql_usernames="$mysql_usernames"'