Application: Judge Dredd: Dredd vs. Death http://www.dreddvsdeath.com Versions: <= 1.01 Platforms: Windows Bug: format string Exploitation: remote, versus server (in-game) Date: 02 October 2004 Author: Luigi Auriemma e-mail: firstname.lastname@example.org web: http://aluigi.altervista.org
1) Introduction 2) Bug 3) The Code 4) Fix
=============== 1) Introduction ===============
Dredd vs Death is a cool FPS game based on the homonym comic strip. The game has been developed by Rebellion (http://www.rebellion.co.uk) and has been released in October 2003.
====== 2) Bug ======
The problem is a format string bug in the handling of the messages received from clients like "player connected", chat messages and so on.
Like any in-game bug, the attacker must have access to the match (so if the server is protected by password, he must know it).
=========== 3) The Code ===========
Launch a client and a server, go on the client side, join the server and send the following chat message (by default pressing the 'T' key):
The server will crash immediately.
You can do the same check running only the server and sending the chat message from the same computer.
====== 4) Fix ======
No fix. Developers have not replied to my mails.
Luigi Auriemma http://aluigi.altervista.org