full-disclosure - Crashs in Master of Orion III 1.2.5

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From: aluigi at autistici.org (Luigi Auriemma)
Subject: Crashs in Master of Orion III 1.2.5

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

                             Luigi Auriemma

Application:  Master of Orion III
              http://moo3.quicksilver.com
Versions:     <= 1.2.5
Platforms:    Windows and MacOS
Bugs:         - allocation error
              - big nicknames crash
Exploitation: remote, versus server
Date:         27 October 2004
Author:       Luigi Auriemma
              e-mail: aluigi@...ervista.org
              web:    http://aluigi.altervista.org

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

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

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

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

Master of Orion III is a spatial strategy game developed by Quicksilver
(http://www.quicksilver.com) and released in February 2003.

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=======
2) Bugs
=======

-------------------
A] allocation error
-------------------

Each data block exchanged between clients and server is preceded by a
32 bits number used to specify its size.
This amount of data is automatically allocated by the game and if it is
too big, and so unallocable, the game automatically exits.

----------------------
B] big nicknames crash
----------------------

The game uses some anti buffer-overflow protections but if an attacker
makes multiple consecutive connections (variable between 1 and 10)
using big nicknames, the game crashs.

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

http://aluigi.altervista.org/poc/moo3boom.zip

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

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

No fix.
Developers will not fix this problem unless there are significant
incidents reported.

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

--- 
Luigi Auriemma
http://aluigi.altervista.org