[unisog] UDP fragments anyone?
Alex Butcher
alex.butcher at bristol.ac.uk
Fri Feb 23 10:42:29 GMT 2007
Valdis.Kletnieks at vt.edu wrote:
> On Wed, 21 Feb 2007 08:17:15 +1300, Russell Fulton said:
>
>> any tools worth their salt will reassemble packets *before* examining
>> the contents and will flag overlapping fragments.
>
> The fun starts when the tool and the destination system don't handle some
> "should not happen" corner cases the same way.
Some nice examples in slides 9-20 inclusive of
<http://www.doxpara.com/slides/Black%20Ops%20of%20TCP2005_Japan.ppt>
(if anyone hasn't already, and gets a chance to see Dan Kaminsky talk,
go for it; very entertaining and educational stuff!)
Best Regards,
Alex.
--
Alex Butcher: Security & Integrity, Personal Computer Systems Group
Information Systems and Computing GPG Key ID: F9B27DC9
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