full-disclosure - NULL pointer crash in World in Conflict 1.000

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Date: Tue, 9 Oct 2007 22:31:56 +0200
From: Luigi Auriemma <aluigi@...istici.org>
To: bugtraq@...urityfocus.com, bugs@...uritytracker.com,
	news@...uriteam.com, full-disclosure@...ts.grok.org.uk, vuln@...unia.com,
	packet@...ketstormsecurity.org
Subject: NULL pointer crash in World in Conflict 1.000

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

                             Luigi Auriemma

Application:  World in Conflict
              http://www.worldinconflict.com
Versions:     <= 1.000
Platforms:    Windows
Bug:          access to NULL pointer
Exploitation: remote, versus server
Date:         09 Oct 2007
Author:       Luigi Auriemma
              e-mail: aluigi@...istici.org
              web:    aluigi.org

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

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

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

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

World in conflict is a RTS game developed by Massive Entertainment
(http://www.massive.se) and released about a month ago.

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

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

The server is vulneable to a Denial of Service attack (crash) caused by
the access to a NULL pointer.
The problem happens in the GetMagicNumberString function which takes
the third byte of the data received from the client on the VOIP port
52999 and returns a text string if this value is valid ("ABC" for type
0, "DEF" for 1, "GHI" for 2 and so on) or NULL if it's invalid.
Then the string returned by this function is compared with another one
and here happens the NULL pointer access.

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

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

Connect to the VOIP port of the server (default 52999) with telnet or
netcat and type something like aaaaaaa.
The server will crash immediately.

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

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

Patch v1.001 (aka Update #001)

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

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

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