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Luigi Auriemma

Application: Tincat network library
http://www.tincat.de
Versions: Release 2 < 2.0.28
Release 1 should be not vulnerable
Games: - Sacred <= 1.8.2.6
- The Settlers: Heritage of Kings <= 1.02
- other applications, a partial list in german is
available at the following link but I cannot confirm if
they are vulnerable:
http://www.tincat.de/index.php?topic=5
Platforms: Windows, Linux and Sun Solaris
Bug: buffer-overflow
Exploitation: remote, versus server
Date: 28 Mar 2005
Author: Luigi Auriemma
e-mail: aluigi@autistici.org
web: http://aluigi.altervista.org


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


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


Tincat is a network library for games and has been developed by the
german guys of Instance Four (http://www.instancefour.com).
It is used in some games like the recents and well known Sacred
(http://www.sacred-game.com) and The Settlers: Heritage of Kings
(http://www.thesettlers.com).


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2) Bug
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The library is affected by a buffer-overflow in the function that logs
the players entered in the server letting an attacker to execute
malicious code on the victim system.


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3) The Code
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http://aluigi.altervista.org/poc/tincat2bof.zip


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4) Fix
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The library has been patched from build 28 (2.0.28).

Actually "The Settlers: Heritage of Kings" 1.03 is the only game that
uses the new patched library.


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