Crashs in Master of Orion III 1.2.5

[Luigi Auriemma <aluigi@xxxxxxxxxxxxx>]

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                             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@xxxxxxxxxxxxxx
              web:    http://aluigi.altervista.org


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


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===============
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
=======


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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.


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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


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4) Fix
======


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


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