####################################################################### Luigi Auriemma Application: Halo: Combat Evolved http://www.microsoft.com/games/pc/halo.aspx Versions: <= 1.06 and Custom Edition 1.00 Platforms: Windows Bug: endless loop Exploitation: remote, versus server Date: 24 May 2005 Author: Luigi Auriemma e-mail: aluigi@autistici.org web: aluigi.org ####################################################################### 1) Introduction 2) Bug 3) The Code 4) Fix ####################################################################### =============== 1) Introduction =============== Halo is the great FPS game developed by Bungie Studios and ported on PC by Gearbox Software (http://www.gearboxsoftware.com). It is published by Microsoft Games (http://www.microsoft.com/games/) and has been released at the end of 2003. ####################################################################### ====== 2) Bug ====== The game is not able to handle the malformed data with the conseguence of entering in an endless loop that continues to check the same data. The effects are that the server freezes completely, so is no longer able to handle packets, and the CPU goes to 100%. ####################################################################### =========== 3) The Code =========== http://aluigi.org/poc/haloloop.zip ####################################################################### ====== 4) Fix ====== The upcoming version 1.07 should be released in these days, the bug has been reported to the developers exactly one month ago. #######################################################################