Skype Vendor Website - Cross Site Scripting Vulnerability

Document Title:
===============
Skype Vendor Website - Cross Site Scripting Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=309


Release Date:
=============
2011-11-12


Vulnerability Laboratory ID (VL-ID):
====================================
309


Common Vulnerability Scoring System:
====================================
1.5


Product & Service Introduction:
===============================
Skype is a software application that allows users to make voice and video calls and chats over the Internet. Calls to other users within the
Skype service are free, while calls to both traditional landline telephones and mobile phones can be made for a fee using a debit-based
user account system. Skype has also become popular for its additional features which include instant messaging, file transfer, and
videoconferencing. Skype has 663 million registered users as of 2010.  The network is operated by Skype Limited, which has its headquarters
in Luxembourg. Most of the development team and 44% of the overall employees of Skype are situated in the offices of Tallinn and Tartu, Estonia.

(Copy of the Vendor Homepage: http://en.wikipedia.org/wiki/Skype)


Abstract Advisory Information:
==============================
The Vulnerability-Lab Team discovered a cross site scripting vulnerability on the Skype main vendor website.


Vulnerability Disclosure Timeline:
==================================
2011-11-04:	Vendor Notification
2011-11-05:	Vendor Response/Feedback
2011-11-10:	Vendor Fix/Patch 
2011-11-11:	Public or Non-Public Disclosure


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


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


Severity Level:
===============
Low


Technical Details & Description:
================================
A non-persistent cross site scripting vulnerability is detected on the Skype vendor website. The vulnerability allows remote 
attackers to hijack skype customer sessions via cross site scripting. Successful exploitation of the client-side vulnerability 
can result in session hijacking & account steal.


Vulnerable Module(s):
				                        [+] Subscriptions to call a single country

Affected Module(s):
							[+] Skype.com

Picture(s):
			                              	../ive1.png
			                              	../ive2.png
			                              	../ive3.png


Proof of Concept (PoC):
=======================
The vulnerabilities can be exploited by remote attackers on client-side via required user inter action. 
For demonstration or reproduce ...

PoC:
"><img src="tester1337.png" onerror=alert("CROSS-SITE-SCRIPTING") />


Reference(s): 
www.skype.com/intl/en/prices/pay-monthly-new


Security Risk:
==============
The security risk of the non persistent cross site scripting vulnerability is estimated as low(+).


Credits & Authors:
==================
Vulnerability Research Laboratory -  Aditya Gupta


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties, 
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-
Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business 
profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some 
states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation 
may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack into databases 
or trade with fraud/stolen material.

Domains:    www.vulnerability-lab.com   	- www.vuln-lab.com			       - www.vulnerability-lab.com/register
Contact:    [email protected] 	- [email protected] 	       - [email protected]
Section:    video.vulnerability-lab.com 	- forum.vulnerability-lab.com 		       - news.vulnerability-lab.com
Social:	    twitter.com/#!/vuln_lab 		- facebook.com/VulnerabilityLab 	       - youtube.com/user/vulnerability0lab
Feeds:	    vulnerability-lab.com/rss/rss.php	- vulnerability-lab.com/rss/rss_upcoming.php   - vulnerability-lab.com/rss/rss_news.php

Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory. 
Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other 
media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, sourcecode, videos and 
other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list (feed), 
modify, use or edit our material contact ([email protected] or [email protected]) to get a permission.

    				   	Copyright © 2012 | Vulnerability Laboratory