From: Tim Fletcher (tim@NIGHT-SHADE.DEMON.CO.UK)
To: BUGTRAQ@netspace.org
Date: Tue, 16 Feb 1999 21:25:47 +0000
Subject: Quake client killer

Not sure if this is news but I have found a way to take down remote quake
clients (Win95) very simply with little evidence left behind. Basicly you
write a few hundred k of data to one of the udp listening ports and
quake dies and up pops a little dialog box saying:

A network error has occured

I found this over the weekend while admining a small LAN party were
everything worked too well so I got bored hence tried out of curiousity
this:

dd if=/dev/zero | nc -u client 27501

I haven't tried this on NT / Linux / Other clients or games, it appers
on Win98 and Win95 and has no effect on servers that I can tell, thou
nothing is logged.

I wonder if the effect only appers if done from the server because I
didn't have time to try much out and the normal connection for quake is

client:27001 -> server:27500

And I was working on the server.

      Tim Fletcher                  .~.

=-=-=

From: Tim Fletcher (tim@NIGHT-SHADE.DEMON.CO.UK)
To: BUGTRAQ@netspace.org
Date: Fri, 19 Feb 1999 02:05:32 +0000
Subject: Quakeworld client killer followup

Follow up to my posting on quake client killer...

1. The bug appers in quakeworld
2. The server and client were version 2.30
3. There appers to be no effect on linux quake2 clients

      Tim Fletcher                  .~.