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Soldier of Fortune II Buffer Overflow and Denial of Service
Secunia Advisory: SA13289
Release Date: 2004-11-24
Last Update: 2005-02-25
Popularity: 7,156 views

Critical:
Moderately critical
Impact: DoS
Where: From remote
Solution Status: Unpatched

Software:Soldier of Fortune II 1.x

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CVE reference:CVE-2004-1542


Description:
Luigi Auriemma has reported two vulnerabilities in Soldier of Fortune II, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) Some boundary errors in the communication handling can be exploited by sending an overly long query or response to a vulnerable game server or client e.g. browsing the online server list.

Successful exploitation crashes a vulnerable server or client, but can reportedly not be exploited for execution of arbitrary code.

2) An error in the communication handling can be exploited to crash a vulnerable server by sending a specially crafted UDP datagram with an overly large "cl_guid" value.

The vulnerabilities have been reported in version 1.03 gold. Other versions may also be affected.

Solution:
Servers:
Grant only trusted clients access to games.

Clients:
Connect to trusted servers only and don't use the online server list.

Provided and/or discovered by:
Luigi Auriemma

Changelog:
2005-02-21: Added CVE reference.
2005-02-25: Another vulnerability reported. Updated advisory.

Original Advisory:
1) http://aluigi.altervista.org/adv/sof2boom-adv.txt
2) http://aluigi.altervista.org/adv/sof2guidboom-adv.txt


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