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Skype Cross Site Scripting

Skype Cross Site Scripting
Posted Nov 12, 2011
Authored by Aditya Gupta, Vulnerability Laboratory | Site vulnerability-lab.com

The Skype vendor website suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 22dbe42f1a221b90095564d5f9448154d5c7174012997d50ff15350beae0f877

Skype Cross Site Scripting

Change Mirror Download
Title:
======
Skype Vendor Website - Cross Site Scripting Vulnerability


Date:
=====
2011-11-11


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


VL-ID:
=====
309


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


Report-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


Status:
========
Published


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


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


Details:
========
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:
=================
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


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


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


Disclaimer:
===========
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. Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability-
Lab. 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 or its suppliers.

Copyright © 2011|Vulnerability-Lab




--
Website: www.vulnerability-lab.com ; vuln-lab.com or vuln-db.com
Contact: admin@vulnerability-lab.com or support@vulnerability-lab.com

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