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Message-ID: <20041122182101.034b02ba.aluigi@autistici.org> Date: Mon, 22 Nov 2004 18:21:01 +0000 From: Luigi Auriemma <aluigi@...istici.org> To: bugtraq@...urityfocus.com, bugs@...uritytracker.com, news@...uriteam.com, full-disclosure@...ts.netsys.com, vuln@...unia.com Subject: Broadcast client crash in Halo 1.05 ####################################################################### Luigi Auriemma Application: Halo: Combat Evolved http://www.microsoft.com/games/pc/halo.aspx Versions: <= 1.05 Platforms: Windows and MacOS Bug: crash Exploitation: remote, versus clients (broadcast) Date: 22 November 2004 Author: Luigi Auriemma e-mail: aluigi@...ervista.org web: http://aluigi.altervista.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 has been released at the end of 2003. ####################################################################### ====== 2) Bug ====== The problem affects the in-game browser of the clients used to navigate through the list of online servers and is caused by some overrun protections. If these instructions find a too long value in a server's reply, they pass a NULL pointer (instead of the original value) to a wcsncpy() function causing the crash. This is a broadcast client crash, so a single attacker visible in the master server list can passively exploit any vulnerable client in the world. ####################################################################### =========== 3) The Code =========== http://aluigi.altervista.org/poc/halocboom.zip ####################################################################### ====== 4) Fix ====== Version 1.06 ####################################################################### --- Luigi Auriemma http://aluigi.altervista.org
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