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q3infoboom.txt

q3infoboom.txt
Posted Feb 24, 2005
Authored by Luigi Auriemma | Site aluigi.altervista.org

The Quake 3 engine has problems handling big queries allowing an attacker to shutdown any game server based on this engine.

tags | advisory
SHA-256 | 78b11d8586e5b06edba83d347f651192620eb4e4a532b70eb0b25ab3b3b0947d

q3infoboom.txt

Change Mirror Download

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

Luigi Auriemma

Application: Quake 3 engine
http://www.idsoftware.com
Games: - Call of Duty <= 1.5
- Call of Duty: United Offensive <= 1.51
- Heavy Metal: F.A.K.K.2 <= 1.02
- Quake III Arena <= 1.32
- Return to Castle Wolfenstein <= 1.41
- Soldier of Fortune II: Double Helix <= 1.03
- Star Trek Voyager: Elite Force <= 1.20
- Star Trek: Elite Force II <= 1.10
- Star Wars Jedi Knight II: Jedi Outcast <= 1.04
- Star Wars Jedi Knight: Jedi Academy <= 1.011
- Wolfenstein: Enemy Territory <= 1.02 / 2.56
...possibly others
Platforms: Windows, Linux and Mac
Bug: crash or shutdown caused by incorrect handling of big
queries
Exploitation: remote, versus server
Date: 12 Feb 2005
Author: Luigi Auriemma
e-mail: aluigi@autistici.org
web: http://aluigi.altervista.org


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


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


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

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


The Quake 3 engine is the well known game engine developed by ID
Software (http://www.idsoftware.com) and is used by many games.

Some months ago I reported similar problems in three games based on
this engine: Medal of Honor, Call of Duty and Soldier of Fortune II.
Except for Medal of Honor that is affected by a specific buffer
overflow, the other two games can be "probably" included in this
advisory too but I'm not totally sure.


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

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


The Quake 3 engine has problems to handle big queries allowing an
attacker to shutdown any game server based on this engine:

ERROR: Info_SetValueForKey: oversize infostring

In some of the vulnerable games is also possible to crash the server.


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

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


http://aluigi.altervista.org/poc/q3infoboom.zip

A simple scanner for testing any game based on the Quake 3 engine.


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

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


Only the two Call of Duty games have been fixed with the 1.5b and 1.51b
patches, all the others are still vulnerable.

I have released an universal patcher that limits the amount of handled
data in the queries from 1023 to 767 solving the problem in any game:

http://aluigi.altervista.org/patches/q3infofix.zip


(only in Heavy Metal: F.A.K.K.2 is needed to reduce the amount of
handled data to less than 512 instead of 767)


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


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

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