[NT] Warrior Kings: Battles Fromat String

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  Warrior Kings: Battles Fromat String
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SUMMARY

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".

A format string vulnerability exists in Warrior Kings and its successor 
Warrior Kings: Battles, exploiting this vulnerability allows arbitrary 
code execution on vulnerable game server.

DETAILS

Vulnerable Systems:
 * Warrior Kings: Battles version 1.23 and prior
 * Warrior Kings version 1.3 and prior

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.

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.

Proof of concepts:
 <http://aluigi.altervista.org/poc/wkbbugs.zip> 
http://aluigi.altervista.org/poc/wkbbugs.zip
 <http://aluigi.altervista.org/poc/warkingsfs.zip> 
http://aluigi.altervista.org/poc/warkingsfs.zip


ADDITIONAL INFORMATION

The information has been provided by  <mailto:[email protected]> Luigi 
Auriemma.
The original article can be found at:  <http://aluigi.altervista.org> 
http://aluigi.altervista.org



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