bugtraq - Unicode buffer-overflow in Zoom Player 6.00b2

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Date: Mon, 24 Dec 2007 18:48:05 +0100
From: Luigi Auriemma <aluigi@...istici.org>
To: bugtraq@...urityfocus.com, bugs@...uritytracker.com,
	news@...uriteam.com, full-disclosure@...ts.grok.org.uk,
	vuln@...unia.com, packet@...ketstormsecurity.org
Subject: Unicode buffer-overflow in Zoom Player 6.00b2


#######################################################################

                             Luigi Auriemma

Application:  Zoom Player
              http://www.inmatrix.com
Versions:     <= v6.00 beta 2 and naturally all the stable v5 versions
Platforms:    Windows
Bug:          unicode buffer-overflow
Exploitation: local
Date:         24 Dec 2007
Author:       Luigi Auriemma
              e-mail: aluigi@...istici.org
              web:    aluigi.org


#######################################################################


1) Introduction
2) Bug
3) The Code
4) Fix


#######################################################################

===============
1) Introduction
===============


Zoom Player is a media player for Windows which supports many formats
through external filters.


#######################################################################

======
2) Bug
======


Zoom Player is affected by an unicode buffer-overflow in the function
which builds the error messages.
The problem can be exploited for example through a malformed ZPL file
containing a http link to a file with PLS extension which will force
the program to use wsprintf for building the "Unable to play [%s]"
error message.


#######################################################################

===========
3) The Code
===========


http://aluigi.org/poc/zoomprayer.zpl


#######################################################################

======
4) Fix
======


The next beta will contain the fix.


#######################################################################


--- 
Luigi Auriemma
http://aluigi.org