Unicode buffer-overflow in Zoom Player 6.00b2 Dec 24 2007 05:48PM
Luigi Auriemma (aluigi autistici org)

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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: aluigi (at) autistici (dot) org [email concealed]
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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