Luigi Auriemma

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 Post subject: codstatsfix
PostPosted: 30 Jun 2009 16:01 

Joined: 13 Aug 2007 21:44
Posts: 4068
Location: http://aluigi.org
I talked about this possible problem over one year ago: post2043.html#p2043

I'm not sure if it produces or not big effects, from a quick test the only visible results are the rising of the CPU usage and tons of entries in the log which obviously are not a pleasure.
anyway an admin reported that this small Denial of Service has been abused lately so I have decided to make a quick universal fix for both cod4 and cod5.

patch:
http://aluigi.org/patches/codstatsfix.lpatch

testing of the bug:
udpsz -l 1 -C "ff ff ff ff 73 74 61 74 73" 127.0.0.1 28960 -1


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 Post subject: Re: codstatsfix
PostPosted: 01 Jul 2009 20:36 

Joined: 01 Jul 2009 20:09
Posts: 1
Location: Netherlands
aluigi wrote:
anyway an admin reported that this small Denial of Service has been abused lately so I have decided to make a quick universal fix for both cod4 and cod5.

That admin would be me. :)

I've tested this fix and it works like a charm. The cpu-usage rises up to 100% when I test this on my server without this fix. This is in a Lan environnement. I don't know what happens when an attack is taken place with a normal internetconnection, but with this fix there is normal cpu-usage.
As a admin you should consider this as an attack on your server, even if it's harmless after version 1.7 the choice is yours what to do with it.

@ aluigi.
Thanks a lot for all the time you spent on this subject for helping me out here.
I appreciate it very much.
Keep up the great work.


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