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


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


Release Date:
=============
2012-04-23


Vulnerability Laboratory ID (VL-ID):
====================================
484


Common Vulnerability Scoring System:
====================================
4


Product & Service 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 Advisory Information:
==============================
A Vulnerability Laboratory Researcher discovered a persistent Cross-Site Scripting vulnerability in C4B XPhone UC Web v4.1.890SR1.


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


Discovery Status:
=================
Published


Affected Product(s):
====================
C4B
Product: XPhone UC Web 4.1.890SR1


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


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


Technical Details & Description:
================================
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 (PoC):
=======================
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>



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


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


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=========================
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