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                             Luigi Auriemma

Application:  Halo: Combat Evolved
http://www.microsoft.com/games/pc/halo.aspx 
Versions:     <= 1.07
Platforms:    Windows
Bug:          endless loop
Exploitation: remote, versus server
Date:         29 Jun 2008
Author:       Luigi Auriemma
e-mail: aluigi@autistici.org 
              web:    aluigi.org


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


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

Halo is the great FPS game developed by Bungie Studios and ported on PC
by Gearbox Software (http://www.gearboxsoftware.com). 
Although it has been released at the end of 2003, it's still one of the
most played games with hundreds of internet servers.


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

This vulnerability is exactly like the old one I found over 3 years ago
in version 1.06 (haloloop) and which was fixed (or it's the case of
saying partially fixed) in version 1.07: an endless loop caused by a
malformed in-game packet which freezes completely the server.


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

http://aluigi.org/poc/haloloop2.zip 


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

No fix.


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