C4B XPhone UC Web 4.1.890S R1 - Cross Site Vulnerability

[Research <research@xxxxxxxxxxxxxxxxxxxxx>]

Title:
======
C4B XPhone UC Web 4.1.890S R1 - Cross Site Vulnerability


Date:
=====
2012-04-24


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=484


VL-ID:
=====
484


Introduction:
=============
XPhone Unified Communications 2011 ist die leistungsstärkste Telefonie- und 
Kommunikationslösung von C4B. 
Sie ist leicht zu bedienen und verbessert die Arbeitsabläufe  in Unternehmen. 
Die Lösung integriert sich 
nahtlos in bestehende Anwendungen und nutzt die vorhandene Telefonanlage und 
IT-Infrastruktur. Dabei 
werden die verschiedensten Kommunikationsmittel wie Telefon, Handy, Fax, 
Voicemail, SMS und Instant Messaging 
vereint und mit Präsenzinformationen kombiniert. Die Software stellt 
leistungsfähige Telefonie-Funktionen in 
praktisch allen Anwendungen wie z.B. Microsoft Outlook, Lotus Notes, 
Warenwirtschaftssystemen (ERP), 

Kundendatenbanken (CRM) oder dem Webbrowser zur Verfügung. Die Verknüpfung von 
Telefonereignissen mit bestimmten 
Aktionen, z.B. Starten von Anwendungen, automatische Erstellung von Briefen 
oder Faxe u.v.m, verbessert die 
Arbeitsabläufe in Unternehmen spürbar.

(Copy of the Vendor Homepage: http://www.c4b.de )


Abstract:
=========
A Vulnerability Laboratory Researcher discovered a persistent Cross-Site 
Scripting vulnerability in C4B XPhone UC Web v4.1.890SR1.


Report-Timeline:
================
2012-04-24:     Public or Non-Public Disclosure


Status:
========
Published


Affected Products:
==================
C4B
Product: XPhone UC Web v4.1.890SR1


Exploitation-Technique:
=======================
Remote


Severity:
=========
Medium


Details:
========
A persistent Cross-Site Scripting vulnerability has been detected on C4B XPhone 
UC Web v4.1.890SR1 and versions below. 
The bug allows an attacker to inject arbitrary script code on the application 
side (persistent) via for example 
a connected groupware application like Microsoft Outlook or IBM Lotus Notes. 
The injected script code is 
executed on every client who is searching for details of the manipulated user 
on the web application. Successful 
exploitation of the vulnerability can therefor lead to session hijacking or 
stable (persistent) context manipulation.

Vulnerable Module(s):
                                [+] Work => Home/Work => Company Name (Input)
                                [+] Contact Phone Listing => Company Name 
Display Conversation (Output)


Picture(s):
                                ../1.png
                                ../2.png


Proof of Concept:
=================
The vulnerability can be exploited by a remote attacker who is able to change 
his own Groupware details to inject arbitrary code 
like shown on the screenshots, which results in a persistent context 
manipulation ...

File: Client.aspx

<div id="XPhoneMCDivSearchDetails" style="display: block;" class="ai2" 
title="Anwesend (Bis auf Weiteres)" 
userguid="7c9064ab-d6ce-XXXX-XXXX-XXXXXXXXXXXX">
  <strong>Julien Ahrens</strong>
  <br>Vulnerability-Lab<br><iframe 
src="http://www.vulnerability-lab.com/index.php";></iframe>
</div>

<div id="XPhoneMCDivSearchDetails" style="display: block; " class="ai2" 
title="Anwesend (Bis auf Weiteres)" 
userguid="7c9064ab-d6ce-XXXX-XXXX-XXXXXXXXXXXX">
  <strong>Julien Ahrens</strong><br>
  <a href="www.vulnerability-lab.com" 
onclick="javascript:alert(document.cookie)">Vulnerability-Lab</a>
</div>



Risk:
=====
The security risk of the persistent cross site scripting vulnerability is 
estimated as medium.


Credits:
========
Vulnerability Research Laboratory   -   Julien Ahrens  (MrTuxracer)  
[www.inshell.net]


Disclaimer:
===========
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                                                Copyright © 2012 
Vulnerability-Lab




-- 
VULNERABILITY RESEARCH LABORATORY TEAM
Website: www.vulnerability-lab.com
Mail: research@xxxxxxxxxxxxxxxxxxxxx