TITLE:
PunkBuster Cvars Monitoring Format String Vulnerability

SECUNIA ADVISORY ID:
SA18917

VERIFY ADVISORY:
http://secunia.com/advisories/18917/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
PunkBuster 1.x
http://secunia.com/product/8131/

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

ORIGINAL ADVISORY:
http://aluigi.altervista.org/adv/sof2pbfs-adv.txt

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