[Full-disclosure] 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@autistici.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

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/