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Category:   Application (Game)  >   Halo Vendors:   Microsoft
Halo: Combat Evolved Null Pointer Error Lets Remote Users Deny Service
SecurityTracker Alert ID:  1012315
SecurityTracker URL:  http://securitytracker.com/id/1012315
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Nov 24 2004
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 1.05 and prior versions
Description:   Luigi Auriemma reported a vulnerability in Halo: Combat Evolved. A remote user can cause clients to crash.

It is reported that a remote user can send a specially crafted packet to cause all connected clients to crash.

A demonstration exploit is available at:

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

Impact:   A remote user can cause clients to crash.
Solution:   The vendor has issued a fixed version (1.06).
Vendor URL:  www.microsoft.com/games/pc/halo.aspx (Links to External Site)
Cause:   Exception handling error
Underlying OS:  Apple (Legacy "classic" Mac), Windows (Any)

Message History:   None.


 Source Message Contents

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@altervista.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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