[Full-disclosure] Format string and crash in Warrior Kings 1.3 and Battles 1.23

[Luigi Auriemma <aluigi@xxxxxxxxxxxxx>]

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                             Luigi Auriemma

Application:  Warrior Kings: Battles
                http://www.warriorkingsbattles.com
              Warrior Kings
               
http://www.empireinteractive.com/games/product.asp?PID=CCD3E776-8DDB-4A4C-8A19-922D58804A24
Versions:     Warrior Kings: Battles <= 1.23
              Warrior Kings          <= 1.3
Platforms:    Windows
Bugs:         A] format string
              B] crash
Exploitation: remote, versus server
Date:         23 May 2005
Author:       Luigi Auriemma
              e-mail: aluigi@xxxxxxxxxxxxx
              web:    http://aluigi.altervista.org


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


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


Warrior Kings: Battles is a real-time strategy game developed by
Black Cactus (http://www.blackcactus.co.uk) and released in March 2003.
The game is published by Empire Interactive and Strategy First.

Warrior Kings instead is published by Microids and Empire Interactive
and has been released exactly one year before its successor.


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

----------------
A] format string
----------------

The game is affected by a format string bug in the function used to
visualize the text on the screen. The best and simplest way to exploit
the bug is through a malformed nickname.
The only limitation is that the attacker cannot exploit the bug if the
server is locked.


--------
B] crash
--------

A partial join packet causes the crash of the server due to the access
to a NULL pointer.
Only Warrior Kings Battles seems affected by this problem.


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


http://aluigi.altervista.org/poc/wkbbugs.zip
http://aluigi.altervista.org/poc/warkingsfs.zip


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


No fix.
No reply from the vendor.


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

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