Document Title:
===============
Yahoo! Messenger v11.5 - Buffer Overflow Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=434


Release Date:
=============
2012-02-10


Vulnerability Laboratory ID (VL-ID):
====================================
434


Product & Service Introduction:
===============================
Der Yahoo Messenger (eigene Schreibung Yahoo! Messenger, kurz auch Y!M, YIM oder Yim) ist ein verbreiteter 
Instant-Messaging-Client, sowie ein Protokoll von Yahoo. Der Yahoo Messenger ist kostenlos und kann mit 
einem gültigen Yahoo-Zugang heruntergeladen und installiert werden. Die Funktionen des Yahoo Messenger sind 
ICQ, dem AOL Instant Messenger und dem Windows Live Messenger sehr ähnlich, sie sind zueinander aber nicht 
kompatibel. Allerdings haben sich Microsoft und Yahoo entschlossen, ihre IM-Dienste zusammenzuschließen. 
Seit Version 8 von Yahoo Messenger können zumindest Textnachrichten mit dem Windows Live Messenger ausgetauscht werden

(Copy of the Vendor Homepage: http://de.wikipedia.org/wiki/Yahoo_Messenger )


Abstract Advisory Information:
==============================
The Vulnerability Lab Research Team discovered a Buffer Overflow Vulnerability on the Yahoo Messenger v11.5


Vulnerability Disclosure Timeline:
==================================
2012-02-10:	Public or Non-Public Disclosure


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


Affected Product(s):
====================
Yahoo!
Product: Instant Messenger 11.5


Exploitation Technique:
=======================
Local


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


Technical Details & Description:
================================
A Buffer Overflow vulnerability is detected on Yahoos  IMessenger v11.5 client software.
The bug is located on the drag & drop message box function of the software when processing special crafted file transfers. 
The vulnerability allows an local attacker to crash down(stable) the software & all bound yahoo components.

Vulnerable Module(s): 
						[+] Drag & Drop - Message Box




Picture(s):
						../1.png
						../2.png


Proof of Concept (PoC):
=======================
This vulnerability can be exploited by local attackers. For demonstration or reproduce ...

PoC Video:
http://www.vulnerability-lab.com/get_content.php?id=432


Security Risk:
==============
The security risk of the local vulnerability is estimated as high(-).


Credits & Authors:
==================
Vulnerability Research Laboratory    -   Manideep  a.k.a   z3r0 erRoR


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