ImageShack Service Cross Site Scripting

`Title:  
======  
ImageShack Service - Cross Site Scripting Vulnerability  
  
  
Date:  
=====  
2011-12-21  
  
  
References:  
===========  
http://www.vulnerability-lab.com/get_content.php?id=352  
  
  
VL-ID:  
=====  
352  
  
  
Introduction:  
=============  
ImageShack is a free image hosting website. ImageShack has a subscription service but the  
majority of its revenue is produced from advertising related to its free image hosting.  
The imageshack.us Alexa ranking in September 25, 2007 was one of the top 40, but now as  
of September 25, 2011 it s dropped to 135. According to Nielsen//NetRatings, ImageShack  
was the fourth fastest growing web brand in July 2006.  
  
(Copy of the Vendor Homepage: http://en.wikipedia.org/wiki/ImageShack)  
  
  
Abstract:  
=========  
The Vulnerability-Lab Team discovered a cross site scripting vulnerability on the ImageShack main vendor website service.  
  
  
Report-Timeline:  
================  
2011-11-07: Vendor Notification  
2011-12-21: Public or Non-Public Disclosure  
  
  
Status:  
========  
Published  
  
  
Exploitation-Technique:  
=======================  
Remote  
  
  
Severity:  
=========  
Low  
  
  
Details:  
========  
A non-persistent cross site scripting vulnerability is detected on the ImageShack website. The vulnerability allows remote   
attackers to hijack users sessions via cross site scripting. Successful exploitation of the client-side vulnerability   
can result in session hijacking & account steal.  
  
  
Vulnerable Module(s):  
[+] Slideshow  
  
Affected Module(s):  
[+] webplayer.php  
  
Picture(s):  
../imageshack.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(1337) />  
  
Code Review:  
Failed to load album \"><img src=tester1337.png onerror=alert(1337) /> - no slides  
  
Reference(s):   
http://img29.imageshack.us/slideshow/webplayer.php?id=  
  
  
Risk:  
=====  
The security risk of the non persistent cross site scripting vulnerability is estimated as low(+).  
  
  
Credits:  
========  
Vulnerability Research Laboratory - Chokri B.A. (Meister)  
  
  
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: [email protected] or [email protected]  
  
`