[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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