USADOTGOV.NET Root Problems?

Tony Finch dot at dotat.at
Sat Jul 24 14:58:17 UTC 2010


On Sat, 24 Jul 2010, Warren Kumari wrote:
> On Jul 23, 2010, at 2:37 PM, Danny Mayer wrote:
> >
> > Why would any inspection policy not allow fragmented UDP packets?
> > There's nothing wrong with that.
>
> Because it's "hard".... The issue is that then you need to buffer
> fragments until you get a full packet -- which leaves you open to
> attacks that send a bunch of fragments but leave one of them out.
>
> Vendors like to avoid reassembling fragments by default, because it
> makes their performance numbers better....

The Cisco PIX/ASA has horrible bugs in its SMTP inspection code, some also
related to packet boundaries. http://fanf.livejournal.com/102206.html

Tony.
-- 
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