just found this over the net, might be a bit old, but it's interesting nonetheless:

Luigi Auriemma from Secunia Advisories, has reported a vulnerability in Quake3 Engine, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the handling of overly long queries and can be exploited to shutdown or crash a vulnerable service via a specially crafted UDP datagram.

you can find more information here



lame solution though...