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PunkBuster Cvars Monitoring Format String Vulnerability
Secunia Advisory: SA18917
Release Date: 2006-02-17
Last Update: 2006-02-23
Popularity: 7,538 views

Critical:
Highly critical
Impact: DoS
System access
Where: From remote
Solution Status: Vendor Patch

Software:PunkBuster 1.x

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CVE reference:CVE-2006-0771


Description:
Luigi Auriemma has reported a vulnerability in PunkBuster, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially to compromise a vulnerable system.

The vulnerability is caused due to a format string error in the PunkBuster server when kicking a client that has an invalid cvars value. This can be exploited to crash the server and may allow arbitrary code execution, by configuring the monitored cvars on a client to include format string specifiers.

The vulnerability has been reported in version 1.180 and prior.

Note: The vulnerability is reportedly exploitable via Soldier of Fortune II with PunkBuster enabled.

Solution:
The vulnerability has reportedly been fixed by the vendor.

Provided and/or discovered by:
Luigi Auriemma

Changelog:
2006-02-23: Added CVE reference.

Original Advisory:
http://aluigi.altervista.org/adv/sof2pbfs-adv.txt


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