Yahoo Babelfish Service - Cross Site Scripting Vulnerability

Document Title:
===============
Yahoo Babelfish Service - Cross Site Scripting Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=349


Release Date:
=============
2011-12-21


Vulnerability Laboratory ID (VL-ID):
====================================
349


Common Vulnerability Scoring System:
====================================
2.5


Product & Service Introduction:
===============================
Yahoo! Inc. (NASDAQ: YHOO) is an American multinational internet corporation headquartered in Sunnyvale,
California, United States. The company is perhaps best known for its web portal, search engine (Yahoo! Search),
Yahoo! Directory, Yahoo! Mail, Yahoo! News, Yahoo! Groups, Yahoo! Answers, advertising, online mapping
(Yahoo! Maps), video sharing (Yahoo! Video), and social media websites and services. It is one of the
largest websites in the United States.
Yahoo! inclusive was founded by Jerry Yang and David Filo in January 1994 and was incorporated on March 1, 1995.
On January 13, 2009, Yahoo! appointed Carol Bartz, former executive chairman of Autodesk, as its new chief
executive officer and a member of the board of directors. On September 6, 2011, Bartz was removed from her
position at Yahoo! by chairman Roy Bostock and CFO Tim Morse was named as Interim CEO of the company.
According to news sources roughly 700 million people visit Yahoo websites every month. Yahoo! itself claims
it attracts  more than half a billion consumers every month in more than 30 languages .

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


Abstract Advisory Information:
==============================
A Vulnerability-Lab researcher discovered a persistent cross site scripting vulnerability on the yahoo babelfish translation service.


Vulnerability Disclosure Timeline:
==================================
2011-12-22:	Public or Non-Public Disclosure


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


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


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


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


Vulnerable Module(s):
				                        [+] Yahoo! Babel Fish Translator - \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"Translate a web page\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"

Affected Module(s):
							[+] babelfish.yahoo.com

Picture(s):
			                              	../yahoo.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:
1. create a html file
2. paste this code inside
3. host it somewhere ...
"><img src="tester1337.png" onerror=alert("CROSS-SITE-SCRIPTING") />
4. start your save request
5. Result: Execution of script code on application-side (persistent) out of the web translation website context


Reference(s): 
http://babelfish.yahoo.com/


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


Credits & Authors:
==================
Vulnerability Research Laboratory - Ucha Gobejishvili (longrifle0x) 


Disclaimer & Information:
=========================
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