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lse.sh
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#!/bin/sh
# shellcheck disable=1003,1091,2006,2016,2034,2039
# vim: set ts=2 sw=2 sts=2 et:
# Author: Diego Blanco <[email protected]>
# GitHub: https://github.com/diego-treitos/linux-smart-enumeration
#
lse_version="3.7"
#( Colors
#
# fg
red='\e[31m'
lred='\e[91m'
green='\e[32m'
lgreen='\e[92m'
yellow='\e[33m'
lyellow='\e[93m'
blue='\e[34m'
lblue='\e[94m'
magenta='\e[35m'
lmagenta='\e[95m'
cyan='\e[36m'
lcyan='\e[96m'
grey='\e[90m'
lgrey='\e[37m'
white='\e[97m'
black='\e[30m'
#
# bg
b_red='\e[41m'
b_lred='\e[101m'
b_green='\e[42m'
b_lgreen='\e[102m'
b_yellow='\e[43m'
b_lyellow='\e[103m'
b_blue='\e[44m'
b_lblue='\e[104m'
b_magenta='\e[45m'
b_lmagenta='\e[105m'
b_cyan='\e[46m'
b_lcyan='\e[106m'
b_grey='\e[100m'
b_lgrey='\e[47m'
b_white='\e[107m'
b_black='\e[40m'
#
# special
reset='\e[0;0m'
bold='\e[01m'
italic='\e[03m'
underline='\e[04m'
inverse='\e[07m'
conceil='\e[08m'
crossedout='\e[09m'
bold_off='\e[22m'
italic_off='\e[23m'
underline_off='\e[24m'
inverse_off='\e[27m'
conceil_off='\e[28m'
crossedout_off='\e[29m'
#)
#( Globals
#
# user
lse_user_id="$UID"
[ -z "$lse_user_id" ] && lse_user_id="`id -u`"
lse_user="$USER"
[ -z "$lse_user" ] && lse_user="`id -nu`"
lse_pass=""
lse_home="$HOME"
[ -z "$lse_home" ] && lse_home="`(grep -E "^$lse_user:" /etc/passwd | cut -d: -f6)2>/dev/null`"
# system
lse_arch="`uname -m`"
lse_linux="`uname -r`"
lse_hostname="`hostname`"
lse_distro=`command -v lsb_release >/dev/null 2>&1 && lsb_release -d | sed 's/Description:\s*//' 2>/dev/null`
[ -z "$lse_distro" ] && lse_distro="`(source /etc/os-release && echo "$PRETTY_NAME")2>/dev/null`"
# lse
lse_passed_tests=""
lse_executed_tests=""
lse_DEBUG=false
lse_procmon_data=`mktemp`
lse_procmon_lock=`mktemp`
# printf
printf "%s" "$reset" | grep -q '\\' && alias printf="env printf"
# internal data
lse_common_setuid="
/bin/fusermount
/bin/mount
/bin/ntfs-3g
/bin/ping
/bin/ping6
/bin/su
/bin/umount
/lib64/dbus-1/dbus-daemon-launch-helper
/sbin/mount.ecryptfs_private
/sbin/mount.nfs
/sbin/pam_timestamp_check
/sbin/pccardctl
/sbin/unix2_chkpwd
/sbin/unix_chkpwd
/usr/bin/Xorg
/usr/bin/arping
/usr/bin/at
/usr/bin/beep
/usr/bin/chage
/usr/bin/chfn
/usr/bin/chsh
/usr/bin/crontab
/usr/bin/expiry
/usr/bin/firejail
/usr/bin/fusermount
/usr/bin/fusermount-glusterfs
/usr/bin/gpasswd
/usr/bin/kismet_capture
/usr/bin/mount
/usr/bin/mtr
/usr/bin/newgidmap
/usr/bin/newgrp
/usr/bin/newuidmap
/usr/bin/passwd
/usr/bin/pkexec
/usr/bin/pmount
/usr/bin/procmail
/usr/bin/pumount
/usr/bin/staprun
/usr/bin/su
/usr/bin/sudo
/usr/bin/sudoedit
/usr/bin/traceroute6.iputils
/usr/bin/umount
/usr/bin/weston-launch
/usr/lib/chromium-browser/chrome-sandbox
/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/usr/lib/dbus-1/dbus-daemon-launch-helper
/usr/lib/eject/dmcrypt-get-device
/usr/lib/openssh/ssh-keysign
/usr/lib/policykit-1/polkit-agent-helper-1
/usr/lib/polkit-1/polkit-agent-helper-1
/usr/lib/pt_chown
/usr/lib/snapd/snap-confine
/usr/lib/spice-gtk/spice-client-glib-usb-acl-helper
/usr/lib/x86_64-linux-gnu/lxc/lxc-user-nic
/usr/lib/xorg/Xorg.wrap
/usr/libexec/Xorg.wrap
/usr/libexec/abrt-action-install-debuginfo-to-abrt-cache
/usr/libexec/cockpit-session
/usr/libexec/dbus-1/dbus-daemon-launch-helper
/usr/libexec/gstreamer-1.0/gst-ptp-helper
/usr/libexec/openssh/ssh-keysign
/usr/libexec/polkit-1/polkit-agent-helper-1
/usr/libexec/polkit-agent-helper-1
/usr/libexec/pt_chown
/usr/libexec/qemu-bridge-helper
/usr/libexec/spice-client-glib-usb-acl-helper
/usr/libexec/spice-gtk-x86_64/spice-client-glib-usb-acl-helper
/usr/local/share/panasonic/printer/bin/L_H0JDUCZAZ
/usr/sbin/exim4
/usr/sbin/grub2-set-bootflag
/usr/sbin/mount.nfs
/usr/sbin/mtr-packet
/usr/sbin/pam_timestamp_check
/usr/sbin/pppd
/usr/sbin/pppoe-wrapper
/usr/sbin/suexec
/usr/sbin/unix_chkpwd
/usr/sbin/userhelper
/usr/sbin/usernetctl
/usr/sbin/uuidd
"
#regex rules for common setuid
lse_common_setuid="$lse_common_setuid
/snap/core.*
/var/tmp/mkinitramfs.*
"
#critical writable files
lse_critical_writable="
/etc/apache2/apache2.conf
/etc/apache2/httpd.conf
/etc/bash.bashrc
/etc/bash_completion
/etc/bash_completion.d/*
/etc/environment
/etc/environment.d/*
/etc/hosts.allow
/etc/hosts.deny
/etc/httpd/conf/httpd.conf
/etc/httpd/httpd.conf
/etc/incron.conf
/etc/incron.d/*
/etc/logrotate.d/*
/etc/modprobe.d/*
/etc/pam.d/*
/etc/passwd
/etc/php*/fpm/pool.d/*
/etc/php/*/fpm/pool.d/*
/etc/profile
/etc/profile.d/*
/etc/rc*.d/*
/etc/rsyslog.d/*
/etc/shadow
/etc/skel/*
/etc/sudoers
/etc/sudoers.d/*
/etc/supervisor/conf.d/*
/etc/supervisor/supervisord.conf
/etc/sysctl.conf
/etc/sysctl.d/*
/etc/uwsgi/apps-enabled/*
/root/.ssh/authorized_keys
"
#critical writable directories
lse_critical_writable_dirs="
/etc/bash_completion.d
/etc/cron.d
/etc/cron.daily
/etc/cron.hourly
/etc/cron.weekly
/etc/environment.d
/etc/logrotate.d
/etc/modprobe.d
/etc/pam.d
/etc/profile.d
/etc/rsyslog.d/
/etc/sudoers.d/
/etc/sysctl.d
/root
"
#)
#( Options
lse_color=true
lse_alt_color=false
lse_interactive=true
lse_proc_time=60
lse_level=0 #Valid levels 0:default, 1:interesting, 2:all
lse_selection="" #Selected tests to run. Empty means all.
lse_find_opts='-path /proc -prune -o -path /sys -prune -o -path /dev -prune -o' #paths to exclude from searches
lse_grep_opts='--color=always'
#)
#( Lib
cecho() {
if $lse_color; then
printf "%b" "$@"
else
# If color is disabled we remove it
printf "%b" "$@" | sed 's/\x1B\[[0-9;]\+[A-Za-z]//g'
fi
}
lse_recolor() {
o_white="$white"
o_lyellow="$lyellow"
o_grey="$grey"
o_lred="$lred"
o_lgreen="$lgreen"
o_lcyan="$lcyan"
white="$o_grey"
lyellow="$o_lred"
grey="$lgrey"
lred="$red"
lgreen="$b_lgreen$black"
lcyan="$cyan"
}
lse_error() {
cecho "${red}ERROR: ${reset}$*\n" >&2
}
lse_exclude_paths() {
local IFS="
"
for p in `printf "%s" "$1" | tr ',' '\n'`; do
[ "`printf \"%s\" \"$p\" | cut -c1`" = "/" ] || lse_error "'$p' is not an absolute path."
p="${p%%/}"
lse_find_opts="$lse_find_opts -path ${p} -prune -o"
done
}
lse_set_level() {
case "$1" in
0|1|2)
lse_level=$(($1))
;;
*)
lse_error "Invalid level."
exit 1
;;
esac
}
lse_help() {
echo "Use: $0 [options]"
echo
echo " OPTIONS"
echo " -c Disable color"
echo " -C Use alternative color scheme"
echo " -i Non interactive mode"
echo " -h This help"
echo " -l LEVEL Output verbosity level"
echo " 0: Show highly important results. (default)"
echo " 1: Show interesting results."
echo " 2: Show all gathered information."
echo " -s SELECTION Comma separated list of sections or tests to run. Available"
echo " sections:"
echo " usr: User related tests."
echo " sud: Sudo related tests."
echo " fst: File system related tests."
echo " sys: System related tests."
echo " sec: Security measures related tests."
echo " ret: Recurrent tasks (cron, timers) related tests."
echo " net: Network related tests."
echo " srv: Services related tests."
echo " pro: Processes related tests."
echo " sof: Software related tests."
echo " ctn: Container (docker, lxc) related tests."
echo " Specific tests can be used with their IDs (i.e.: usr020,sud)"
echo " -e PATHS Comma separated list of paths to exclude. This allows you"
echo " to do faster scans at the cost of completeness"
echo " -p SECONDS Time that the process monitor will spend watching for"
echo " processes. A value of 0 will disable any watch (default: 60)"
echo " -S Serve the lse.sh script in this host so it can be retrieved"
echo " from a remote host."
}
lse_ask() {
local question="$1"
# We use stderr to print the question
cecho "${white}${question}: ${reset}" >&2
read -r answer
case "$answer" in
y|Y|yes|Yes|ok|Ok|true|True)
return 0
;;
*)
echo "$answer"
return 1
;;
esac
}
lse_request_information() {
if $lse_interactive; then
cecho "${grey}---\n"
[ -z "$lse_user" ] && lse_user=`lse_ask "Could not find current user name. Current user?"`
lse_pass=`lse_ask "If you know the current user password, write it here to check sudo privileges"`
cecho "${grey}---\n"
fi
}
lse_test_passed() {
# Checks if a test passed by ID
local id="$1"
for i in $lse_passed_tests; do
[ "$i" = "$id" ] && return 0
done
return 1
}
lse_test() {
# Test id
local id="$1"
# Minimum level required for this test to show its output
local level=$(($2))
# Name of the current test
local name="$3"
# Output of the test
local cmd="$4"
# Dependencies
local deps="$5"
# Variable name where to store the output
local var="$6"
# Define colors
local l="${lred}!"
local r="${lgreen}"
[ $level -eq 1 ] && l="${lyellow}*" && r="${cyan}"
[ $level -eq 2 ] && l="${lblue}i" && r="${blue}"
# Filter selected tests
if [ "$lse_selection" ]; then
local sel_match=false
for s in $lse_selection; do
if [ "$s" = "$id" ] || [ "$s" = "`printf \"%s\" \"$id\" | cut -c1-3`" ]; then
sel_match=true
fi
done
$sel_match || return 0
fi
# DEBUG messages
$lse_DEBUG && cecho "${lmagenta}DEBUG: ${lgreen}Executing: ${reset}$cmd\n"
# Print name and line
cecho "${white}[${l}${white}] ${grey}${id}${white} $name${grey}"
for i in $(seq $((${#name}+4)) 67); do
echo -n "."
done
# Check dependencies
local non_met_deps=""
for d in $deps; do
lse_test_passed "$d" || non_met_deps="$non_met_deps $d"
done
if [ "$non_met_deps" ]; then
cecho " ${grey}skip\n"
# In "selection mode" we print the missed dependencies
if [ "$lse_selection" ]; then
cecho "${red}---\n"
cecho "Dependencies not met:$reset $non_met_deps\n"
cecho "${red}---$reset\n"
fi
return 1
fi
# If level is 2 and lse_level is less than 2, then we do not execute
# level 2 tests unless their output needs to be assigned to a variable
if [ $level -ge 2 ] && [ $lse_level -lt 2 ] && [ -z "$var" ]; then
cecho " ${grey}skip\n"
return 1
else
if $lse_DEBUG; then
output="`eval "$cmd" 2>&1`"
else
# Execute command if this test's level is in scope
output="`eval "$cmd" 2>/dev/null`"
# Assign variable if available
fi
[ "$var" ] && [ "$output" ] && readonly "${var}=$output"
# Mark test as executed
lse_executed_tests="$lse_executed_tests $id"
fi
if [ -z "$output" ]; then
cecho " ${grey}nope${reset}\n"
return 1
else
lse_passed_tests="$lse_passed_tests $id"
cecho "${r} yes!${reset}\n"
if [ $lse_level -ge $level ]; then
cecho "${grey}---$reset\n"
echo "$output"
cecho "${grey}---$reset\n"
fi
return 0
fi
}
lse_show_info() {
echo
cecho "${lcyan} LSE Version:${reset} $lse_version\n"
echo
cecho "${lblue} User:${reset} $lse_user\n"
cecho "${lblue} User ID:${reset} $lse_user_id\n"
cecho "${lblue} Password:${reset} "
if [ -z "$lse_pass" ]; then
cecho "${grey}none${reset}\n"
else
cecho "******\n"
fi
cecho "${lblue} Home:${reset} $lse_home\n"
cecho "${lblue} Path:${reset} $PATH\n"
cecho "${lblue} umask:${reset} `umask 2>/dev/null`\n"
echo
cecho "${lblue} Hostname:${reset} $lse_hostname\n"
cecho "${lblue} Linux:${reset} $lse_linux\n"
if [ "$lse_distro" ]; then
cecho "${lblue}Distribution:${reset} $lse_distro\n"
fi
cecho "${lblue}Architecture:${reset} $lse_arch\n"
echo
}
lse_serve() {
# get port
which nc >/dev/null || lse_error "Could not find 'nc' netcat binary."
local_ips="`ip a | grep -Eo 'inet ([0-9]{1,3}\.){3}[0-9]{1,3}' | cut -d' ' -f2`"
# Get a valid and non used port
port=`od -An -N2 -i /dev/random|grep -Eo '[0-9]+'`
port_valid=true
while true; do
for ip in $local_ips; do
nc -z "$ip" "$port" && port_valid=false
done
if [ $((port)) -lt 1024 ] || [ $((port)) -gt 65500 ]; then
port_valid=false
fi
$port_valid && break
port=`od -An -N2 -i /dev/random|grep -Eo '[0-9]+'`
done
echo
cecho " Serving ${white}Linux Smart Enumeration${reset} on port ${blue}$port${reset}.\n"
echo
cecho " Depending on your IP and available tools, some of these commands should download it in a remote host:\n"
for ip in $local_ips; do
[ "$ip" = "127.0.0.1" ] && continue
echo
cecho "${reset} [${blue}$ip${reset}]\n"
cecho "${green} * ${white}nc ${reset} $ip $port > lse.sh </dev/null; chmod 755 lse.sh\n"
cecho "${green} * ${white}curl ${reset}--http0.9 '$ip:$port' -o lse.sh; chmod 755 lse.sh\n"
cecho "${green} * ${white}wget ${reset} '$ip:$port' -O lse.sh; chmod 755 lse.sh\n"
cecho "${green} * ${white}exec 3<>/dev/tcp/${reset}$ip/$port;printf '\\\\n'>&3;cat<&3>lse.sh;exec 3<&-;chmod 755 lse.sh\n"
done
nc -l -q0 -p "$port" < "$0" >/dev/null
}
lse_header() {
local id="$1"
shift
local title="$*"
local text="${magenta}"
# Filter selected tests
if [ "$lse_selection" ]; then
local sel_match=false
for s in $lse_selection; do
if [ "`printf \"%s\" \"$s\"|cut -c1-3`" = "$id" ]; then
sel_match=true
break
fi
done
$sel_match || return 0
fi
for i in $(seq ${#title} 70); do
text="$text="
done
text="$text(${green} $title ${magenta})====="
cecho "$text${reset}\n"
}
lse_exit() {
local ec=1
local text="\n${magenta}=================================="
[ "$1" ] && ec=$1
text="$text(${green} FINISHED ${magenta})=================================="
cecho "$text${reset}\n"
rm -f "$lse_procmon_data"
rm -f "$lse_procmon_lock"
exit "$ec"
}
lse_procmon() {
# monitor processes
#NOTE: The first number will be the number of occurrences of a process due to
# uniq -c
while [ -f "$lse_procmon_lock" ]; do
ps -ewwwo start_time,pid,user:50,args
sleep 0.001
done | grep -v 'ewwwo start_time,pid,user:50,args' | sed 's/^ *//g' | tr -s '[:space:]' | grep -v "^START" | grep -Ev '[^ ]+ [^ ]+ [^ ]+ \[' | sort -Mr | uniq -c | sed 's/^ *//g' > "$lse_procmon_data"
}
lse_proc_print() {
# Pretty prints output from lse_procmom received via stdin
printf "${green}%s %8s %8s %s\n" "START" "PID" "USER" "COMMAND"
while read -r l; do
p_num=`echo "$l" | cut -d" " -f1`
p_time=`echo "$l" | cut -d" " -f2`
p_pid=`echo "$l" | cut -d" " -f3`
p_user=`echo "$l" | cut -d" " -f4`
p_args=`echo "$l" | cut -d" " -f5-`
if [ $((p_num)) -lt 20 ]; then # few times probably periodic
printf "${red}%s ${reset}%8s ${yellow}%8s ${red}%s\n" "$p_time" "$p_pid" "$p_user" "$p_args"
else
printf "${magenta}%s ${reset}%8s ${yellow}%8s ${reset}%s\n" "$p_time" "$p_pid" "$p_user" "$p_args"
fi
done
}
#)
########################################################################( TESTS
#
# A successful test will receive some output while a failed tests will receive
# an empty string.
#
########################################################################( users
lse_run_tests_users() {
lse_header "usr" "users"
#user groups
lse_test "usr000" "2" \
"Current user groups" \
'groups' \
"" \
"lse_user_groups"
#user in an administrative group
lse_test "usr010" "1" \
"Is current user in an administrative group?" \
'grep $lse_grep_opts -E "^(adm|admin|root|sudo|wheel)" /etc/group | grep $lse_grep_opts -E "(:|,)$lse_user"'
#other users in an administrative group
lse_test "usr020" "1" \
"Are there other users in administrative groups?" \
'grep $lse_grep_opts -E "^(adm|admin|root|sudo|wheel)" /etc/group | grep -Ev ":$|:$lse_user$" | grep $lse_grep_opts -Ei ":[,a-z_-]+\$"'
#other users with shell
lse_test "usr030" "1" \
"Other users with shell" \
'grep $lse_grep_opts -E ":/[a-z/]+sh\$" /etc/passwd' \
"" \
"lse_shell_users"
#user env information
lse_test "usr040" "2" \
"Environment information" \
'env | grep -v "LS_COLORS"'
#dump user groups
lse_test "usr050" "2" \
"Groups for other users" \
'cat /etc/group'
#dump users
lse_test "usr060" "2" \
"Other users" \
'cat /etc/passwd'
#find defined PATHs
lse_test "usr070" "1" \
"PATH variables defined inside /etc" \
'for p in `grep -ERh "^ *PATH=.*" /etc/ 2> /dev/null | tr -d \"\'"'"' | cut -d= -f2 | tr ":" "\n" | sort -u`; do [ -d "$p" ] && echo "$p";done' \
"" \
"lse_exec_paths"
#check if . is in PATHs
lse_test "usr080" "0" \
"Is '.' in a PATH variable defined inside /etc?" \
'for ep in $lse_exec_paths; do [ "$ep" = "." ] && grep -ER "^ *PATH=.*" /etc/ 2> /dev/null | tr -d \"\'"'"' | grep -E "[=:]\.([:[:space:]]|\$)";done' \
"usr070"
}
#########################################################################( sudo
lse_run_tests_sudo() {
lse_header "sud" "sudo"
#variables for sudo checks
lse_sudo=false
lse_sudo_commands=""
#can we sudo without supplying a password
lse_test "sud000" "0" \
"Can we sudo without a password?" \
'echo "" | sudo -nS id' && lse_sudo=true
#can we list sudo commands without supplying a password
$lse_sudo || \
lse_test "sud010" "0" \
"Can we list sudo commands without a password?" \
'echo "" | sudo -nS -l' \
"" \
"lse_sudo_commands"
if [ "$lse_pass" ]; then
#can we sudo supplying a password
$lse_sudo || \
lse_test "sud020" "0" \
"Can we sudo with a password?" \
'echo "$lse_pass" | sudo -S id' && lse_sudo=true
#can we list sudo commands without supplying a password
if ! $lse_sudo && [ -z "$lse_sudo_commands" ]; then
lse_test "sud030" "0" \
"Can we list sudo commands with a password?" \
'echo "$lse_pass" | sudo -S -l' \
"" \
"lse_sudo_commands"
fi
fi
#check if we can read the sudoers file
lse_test "sud040" "1" \
"Can we read sudoers files?" \
'grep -R "" /etc/sudoers*'
#check users that sudoed in the past
lse_test "sud050" "1" \
"Do we know if any other users used sudo?" \
'for uh in $(cut -d: -f1,6 /etc/passwd); do [ -f "${uh##*:}/.sudo_as_admin_successful" ] && echo "${uh%%:*}"; done'
}
##################################################################( file system
lse_run_tests_filesystem() {
lse_header "fst" "file system"
#writable files outside user's home. NOTE: Does not check if user can write in symlink destination (performance reasons: -L implies -noleaf)
lse_test "fst000" "1" \
"Writable files outside user's home" \
'find / -path "$lse_home" -prune -o $lse_find_opts -not -type l -writable -print;
# Add symlinks owned by the user (so the user can change where they point)
find / -path "$lse_home" -prune -o $lse_find_opts -type l -user $lse_user -print' \
"" \
"lse_user_writable"
#get setuid binaries
lse_test "fst010" "1" \
"Binaries with setuid bit" \
'find / $lse_find_opts -perm -4000 -type f -print' \
"" \
"lse_setuid_binaries"
#uncommon setuid binaries
lse_test "fst020" "0" \
"Uncommon setuid binaries" \
'local setuidbin="$lse_setuid_binaries"; local IFS="
"; for cs in ${lse_common_setuid}; do setuidbin=`printf "$setuidbin\n" | grep -Ev "^$cs$"`;done ; printf "$setuidbin\n"' \
"fst010"
#can we write to any setuid binary
lse_test "fst030" "0" \
"Can we write to any setuid binary?" \
'for b in $lse_setuid_binaries; do [ -x "$b" ] && [ -w "$b" ] && echo "$b" ;done' \
"fst010"
#get setgid binaries
lse_test "fst040" "1" \
"Binaries with setgid bit" \
'find / $lse_find_opts -perm -2000 -type f -print' \
"lse_setgid_binaries"
#uncommon setgid binaries
lse_test "fst050" "0" \
"Uncommon setgid binaries" \
'printf "$lse_setgid_binaries\n" | grep -Ev "^/(bin|sbin|usr/bin|usr/lib|usr/sbin)"' \
"fst040"
#can we write to any setgid binary
lse_test "fst060" "0" \
"Can we write to any setgid binary?" \
'for b in $lse_setgid_binaries; do [ -x "$b" ] && [ -w "$b" ] && echo "$b" ;done' \
"fst040"
#can we read /root
lse_test "fst070" "1" \
"Can we read /root?" \
'ls -ahl /root/'
#check /home permissions
lse_test "fst080" "1" \
"Can we read subdirectories under /home?" \
'for h in /home/*; do [ -d "$h" ] && [ "$h" != "$lse_home" ] && ls -la "$h/"; done'
#check for SSH files in home directories
lse_test "fst090" "1" \
"SSH files in home directories" \
'for h in $(cut -d: -f6 /etc/passwd | sort -u | grep -Ev "^(/|/dev|/bin|/proc|/run/.*|/var/run/.*)$"); do find "$h" \( -name "*id_dsa*" -o -name "*id_rsa*" -o -name "*id_ecdsa*" -o -name "*id_ed25519*" -o -name "known_hosts" -o -name "authorized_hosts" -o -name "authorized_keys" \) -exec ls -la {} \; ; done'
#check useful binaries
lse_test "fst100" "1" \
"Useful binaries" \
'which curl; which dig; which gcc; which nc.openbsd; which nc; which netcat; which nmap; which socat; which wget'
#check for interesting files in home directories
lse_test "fst110" "1" \
"Other interesting files in home directories" \
'for h in $(cut -d: -f6 /etc/passwd); do find "$h" \( -name "*.rhosts" -o -name ".git-credentials" -o -name ".*history" \) -maxdepth 1 -exec ls -la {} \; ;'
#looking for credentials in /etc/fstab and /etc/mtab
lse_test "fst120" "0" \
"Are there any credentials in fstab/mtab?" \
'grep $lse_grep_opts -Ei "(user|username|login|pass|password|pw|credentials)[=:]" /etc/fstab /etc/mtab'
#check if current user has mail
lse_test "fst130" "1" \
"Does '$lse_user' have mail?" \
'ls -l "/var/mail/$lse_user"'
#check if we can access other users mail mail
lse_test "fst140" "0" \
"Can we access other users mail?" \
'for f in /var/mail/*; do [ "$f" != "/var/mail/$lse_user" ] && [ -r "$f" ] && echo "$f"; done'
#check for code repositories
lse_test "fst150" "1" \
"Looking for GIT/SVN repositories" \
'find / $lse_find_opts \( -name ".git" -o -name ".svn" \) -print'
#can we write to files that can give us root
lse_test "fst160" "0" \
"Can we write to critical files?" \
'for uw in $lse_user_writable; do [ -f "$uw" ] && IFS="
"; for cw in ${lse_critical_writable}; do [ "$cw" = "$uw" ] && [ -w "$cw" ] && ls -l $cw; done ; done' \
"fst000"
#can we write to directories that can give us root
lse_test "fst170" "0" \
"Can we write to critical directories?" \
'for uw in $lse_user_writable; do [ -d "$uw" ] && IFS="
"; for cw in ${lse_critical_writable_dirs}; do [ "$cw" = "$uw" ] && [ -w "$cw" ] && ls -ld $cw; done ; done' \
"fst000"
#can we write to directories inside PATHS
lse_test "fst180" "0" \
"Can we write to directories from PATH defined in /etc?" \
'for ep in $lse_exec_paths; do [ -d "$ep" ] && [ -w "$ep" ] && ls -ld "$ep"; done' \
"usr070"
#can we read backups
lse_test "fst190" "0" \
"Can we read any backup?" \
'find / $lse_find_opts -path /usr/lib -prune -o -path /usr/share -prune -o -regextype egrep -iregex ".*(backup|dump|cop(y|ies)|bak|bkp)[^/]*\.(sql|tgz|tar|zip)?\.?(gz|xz|bzip2|bz2|lz|7z)?" -readable -type f -exec ls -al {} \;'
#are there possible credentials in any shell history files
lse_test "fst200" "0" \
"Are there possible credentials in any shell history file?" \
'for h in .bash_history .history .histfile .zhistory; do [ -f "$lse_home/$h" ] && grep $lse_grep_opts -Ei "(user|username|login|pass|password|pw|credentials)[=: ][a-z0-9]+" "$lse_home/$h"; done'
#nfs exports with no_root_squash
lse_test "fst210" "0" \
"Are there NFS exports with 'no_root_squash' option?" \
'grep $lse_grep_opts "no_root_squash" /etc/exports'
#nfs exports with no_all_squash
lse_test "fst220" "1" \
"Are there NFS exports with 'no_all_squash' option?" \
'grep $lse_grep_opts "no_all_squash" /etc/exports'
#files owned by user
lse_test "fst500" "2" \
"Files owned by user '$lse_user'" \
'find / $lse_find_opts -user $lse_user -type f -exec ls -al {} \;'
#check for SSH files anywhere
lse_test "fst510" "2" \
"SSH files anywhere" \
'find / $lse_find_opts \( -name "*id_dsa*" -o -name "*id_rsa*" -o -name "known_hosts" -o -name "authorized_hosts" -o -name "authorized_keys" \) -exec ls -la {} \;'
#dump hosts.equiv file
lse_test "fst520" "2" \
"Check hosts.equiv file and its contents" \
'find /etc -iname hosts.equiv -exec ls -la {} 2>/dev/null \; -exec cat {} \;'
#list nfs shares
lse_test "fst530" "2" \
"List NFS server shares" \
'ls -la /etc/exports 2>/dev/null && cat /etc/exports'
#dump fstab
lse_test "fst540" "2" \
"Dump fstab file" \
'cat /etc/fstab'
}
#######################################################################( system
lse_run_tests_system() {
lse_header "sys" "system"
#who is logged in
lse_test "sys000" "2" \
"Who is logged in" \
'w'
#last logged in users
lse_test "sys010" "2" \
"Last logged in users" \
'last'
#check if /etc/passwd has the hashes (old system)
lse_test "sys020" "0" \
"Does the /etc/passwd have hashes?" \
'grep -v "^[^:]*:[x]" /etc/passwd'
#check if /etc/group has group password hashes (old system)
lse_test "sys022" "0" \
"Does the /etc/group have hashes?" \
'grep -v "^[^:]*:[x]" /etc/group'
#check if we can read any shadow file
lse_test "sys030" "0" \
"Can we read shadow files?" \
'for sf in "shadow" "shadow-" "shadow~" "gshadow" "gshadow-" "master.passwd"; do [ -r "/etc/$sf" ] && printf "%s\n---\n" "/etc/$sf" && cat "/etc/$sf" && printf "\n\n";done'
#check for superuser accounts
lse_test "sys040" "1" \
"Check for other superuser accounts" \
'for u in $(cut -d: -f1 /etc/passwd); do [ $(id -u $u) = 0 ] && echo $u; done | grep -v root'
#can root log in via SSH
lse_test "sys050" "1" \
"Can root user log in via SSH?" \
'grep -E "^[[:space:]]*PermitRootLogin " /etc/ssh/sshd_config | grep -E "(yes|without-password|prohibit-password)"'
#list available shells
lse_test "sys060" "2" \
"List available shells" \
'cat /etc/shells'
#system umask
lse_test "sys070" "2" \
"System umask in /etc/login.defs" \
'grep "^UMASK" /etc/login.defs'
#system password policies
lse_test "sys080" "2" \
"System password policies in /etc/login.defs" \
'grep "^PASS_MAX_DAYS\|^PASS_MIN_DAYS\|^PASS_WARN_AGE\|^ENCRYPT_METHOD" /etc/login.defs'
}
#####################################################################( security
lse_run_tests_security() {
lse_header "sec" "security"
#check if selinux is present
lse_test "sec000" "1" \
"Is SELinux present?" \
'sestatus'
#get all binaries with capabilities
lse_test "sec010" "1" \
"List files with capabilities" \
'getcap -r /' \
"" \
"lse_cap_bin"
#check if we can write an a binary with capabilities
lse_test "sec020" "0" \
"Can we write to a binary with caps?" \
'for b in $(printf "$lse_cap_bin\n" | cut -d" " -f1); do [ -w "$b" ] && echo "$b"; done'
#check if we have all capabilities in any binary
lse_test "sec030" "0" \
"Do we have all caps in any binary?" \
'printf "$lse_cap_bin\n" | grep -v "cap_"'
#search /etc/security/capability.conf for users associated capapilies
lse_test "sec040" "1" \
"Users with associated capabilities" \
'grep -v "^#\|none\|^$" /etc/security/capability.conf' \
"" \
"lse_user_caps"
#does user have capabilities
lse_test "sec050" "0" \
"Does current user have capabilities?" \
'printf "$lse_user_caps\n" | grep "$lse_user"' \
"sec040"
#can user read the auditd log
lse_test "sec060" "0" \
"Can we read the auditd log?" \
'al=/var/log/audit/audit.log; test -r "$al" && echo "tail $al:" && echo && tail "$al"'
}
##############################################################( recurrent tasks
lse_run_tests_recurrent_tasks() {
lse_header "ret" "recurrent tasks"
## CRON
#user crontab
lse_test "ret000" "1" \
"User crontab" \
'crontab -l | grep -Ev "^#"'
#cron tasks writable by user
lse_test "ret010" "0" \
"Cron tasks writable by user" \
'find -L /etc/cron* /etc/anacron /var/spool/cron -writable'
#list cron jobs
lse_test "ret020" "1" \
"Cron jobs" \
'grep -ERv "^(#|$)" /etc/crontab /etc/cron.d/ /etc/anacrontab'
#can we read other user crontabs?
lse_test "ret030" "1" \
"Can we read user crontabs" \
'ls -la /var/spool/cron/crontabs/*'
#can we list other user cron tasks? (you need privileges for this, so if you can something is fishy)
lse_test "ret040" "1" \
"Can we list other user cron tasks?" \
'for u in $(cut -d: -f 1 /etc/passwd); do [ "$u" != "$lse_user" ] && crontab -l -u "$u"; done'
#can we write to any paths present in cron tasks?
lse_test "ret050" "1" \
"Can we write to any paths present in cron jobs" \
'for p in `grep --color=never -hERoi "/[a-z0-9_/\.\-]+" /etc/cron* | grep -Ev "/dev/(null|zero|random|urandom)" | sort -u`; do [ -w "$p" ] && echo "$p"; done' \
"" \
"lse_user_writable_cron_paths"
#can we write to executable paths present in cron tasks?
lse_test "ret060" "0" \
"Can we write to executable paths present in cron jobs" \
'for uwcp in $lse_user_writable_cron_paths; do [ -w "$uwcp" ] && [ -x "$uwcp" ] && grep $lse_grep_opts -R "$uwcp" /etc/crontab /etc/cron.d/ /etc/anacrontab ; done' \
"ret050"
#list cron files
lse_test "ret400" "2" \
"Cron files" \
'ls -la /etc/cron*'
## Systemd Timers
#user timers
lse_test "ret500" "1" \
"User systemd timers" \
'systemctl --user list-timers --all | grep -iq "\.timer" && systemctl --user list-timers --all'