NULL pointer crash in World in Conflict 1.000 Oct 09 2007 08:31PM
Luigi Auriemma (aluigi autistici org)

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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 (at) autistici (dot) org [email concealed]
web: aluigi.org

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

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

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

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2) Bug
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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.

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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.

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4) Fix
======

Patch v1.001 (aka Update #001)

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

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