SEC Consult Vulnerability Lab Security Advisory < 20140710-2 > ======================================================================= title: Multiple critical vulnerabilites product: Schrack MICROCONTROL emergency light system vulnerable version: before 1.7.0 (937) fixed version: 1.7.0 (937) impact: critical homepage: http://www.schrack.at/shop/sicherheitsbeleuchtung.html found: 2014-02-05 by: C. Kudera SEC Consult Vulnerability Lab https://www.sec-consult.com ======================================================================= Vendor description: ------------------- "The microControl is a decentralized power supply system with limited power (LowPower system) for 1-, 3- or 8-hour operation. This system combines the high reliability of a decentralized single-battery system with the ease and comfort of a central battery system. " Source: http://image.schrack.com/datenblaetter/h_nlmi102_de.pdf Business recommendation: ------------------------ The Microcontrol emergency light system, distributed by Schrack Technik GmbH, is an autarchic emergency light system, which is configurable over a web interface. Through the vulnerabilities described in this advisory an attacker can reconfigure the whole emergency light system without authentication. Furthermore he can perform attacks against the users of the web application to deploy Cross-Site-Scripting Trojan Horses or steal sensitive data. It is highly recommended by SEC Consult not to use this product until a thorough security review has been performed by security professionals and all identified issues have been resolved. Vulnerability overview/description: ----------------------------------- 1) Access data disclosure The access data for the ftp and telnet services is accessible without authentication. This information enables an attacker to access the file system of the emergency light system, where he can reconfigure the whole system. 2) Weak default password The password for the web interface can't be changed. The emergency light system is always delivered with the same weak password to every customer. An attacker can reverse engineer the firmware of the emergency light system or request the password from Schrack Technik GmbH. 3) Permanent Cross Site Scripting (XSS) The emergency light system doesn’t encode user input properly. This leads to Cross-Site Scripting vulnerabilities. The vulnerability can be used to persistently include HTML- or JavaScript code to the affected web page. The code is executed in the browser of users if they visit the manipulated site. The vulnerability can be used to change the contents of the displayed site, redirect to other sites or steal user credentials. Additionally, users are potential victims of browser exploits and JavaScript Trojan Horses. 4) Clear text authentication Login data of users is transmitted in clear text. By intercepting network traffic, an attacker can eavesdrop authentication data and take over the victim's account. Proof of concept: ----------------- 1) Access data disclosure The ZTPUsrDtls.txt can be accessed via http://<system_ip>/ZTPUsrDtls.txt 2) Weak default password The credentials are user:not 3) Permanent Cross Site Scripting (XSS) Several Permanent Cross Site Scripting vulnerabilities were noticed in the product during the audit (e.g position textbox in the configuration menu). 4) Clear text authentication The web page is only accessible via the HTTP protocol. Login data can be recorded with a network sniffer. Furthermore a telnet service is running (plain text protocol). Vulnerable / tested versions: ----------------------------- The system tested was the MICROCONTROL 4 emergency light system. Vendor contact timeline: ------------------------ 2014-05-13: Contacted vendor through info@schrack.com, requesting encryption keys and attaching responsible disclosure policy 2014-05-13: Reply from vendor, no encryption keys 2014-05-13: Phone call to clarify the transmission of the advisory (encryption) 2014-05-13: Sending the advisory encrypted to Schrack Technik GmbH 2014-06-03: Asking for status update 2014-06-03: Receiving information regarding patch / firmware update 2014-06-11: Asking for more details about the regarding patch / firmware update 2014-07-09: Phone call to clarify details about the regarding patch / firmware update 2014-07-10: SEC Consult releases security advisory Solution: --------- In order to solve issue 1) and 2) install firmware 1.7.0 (937), available by sending a mail to info@schrack.com 3) Schrack Technik GmbH is working on a patch for this vulnerability 4) For the embedded system, used by the product, SSL is not available. Schrack Technik GmbH recommends using an own network segment for the emergency light system. Devices deliverd after 2014-07-01 already contain firmware 1.7.0 (937) Workaround: ----------- No workaround available. Advisory URL: ------------- https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult Vienna - Bangkok - Frankfurt/Main - Montreal - Singapore - Vilnius Headquarter: Mooslackengasse 17, 1190 Vienna, Austria Phone: +43 1 8903043 0 Fax: +43 1 8903043 15 Mail: research at sec-consult dot com Web: https://www.sec-consult.com Blog: http://blog.sec-consult.com Twitter: https://twitter.com/sec_consult EOF C. Kudera / @2014