[Full-Disclosure] Format string bug in IGI 2: Covert Strike 1.3

[Luigi Auriemma]

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                             Luigi Auriemma

Application:  IGI 2: Covert Strike
              http://www.igi2-game.com
Versions:     <= 1.3
Platforms:    Windows, Linux
Bug:          format string bug
Risk:         high
Exploitation: remote, versus server
Date:         05 Apr 2004
Author:       Luigi Auriemma
              e-mail: aluigi at altervista.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
===============


IGI 2 is a game developed by Innerloop (http://www.innerloop.com) and
released in Febrary 2003.
It has been defined by its creators as "a tactical stealth-based FPS
with plenty of tension and action".


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2) Bug
======


The IGI 2 server is affected by a format string bug in the logging
function of the RCON commands.
FYI, RCON commands are used by admins to administer their servers
remotely. This function exists in both dedicated and normal servers and
cannot be disabled.

A practical example of the bug "in action" is the following:

- Attacker sends: /hello-%08x.%08x.%08x.%08x
- Server logs:    [17:17:28] Consoled:
'hello-082aeefc.00000131.0061b64c.00000011' run from 192.168.0.3:32768


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


http://aluigi.altervista.org/poc/igi2fs.zip


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4) Fix
======


No fix.
Developers have not replied to my mails.


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