From: Luigi Auriemma (aluigiautistici.org)
Date: Mon Dec 24 2007 - 11:48:05 CST

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                             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: aluigiautistici.org
              web: aluigi.org

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

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

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

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======
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.

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

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

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4) Fix
======

The next beta will contain the fix.

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

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