bugtraq - Re: http://www.smashguard.org

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Message-ID: <20040429215507.GA22284@elf.ucw.cz>
Date: Thu, 29 Apr 2004 23:55:07 +0200
From: Pavel Machek <pavel@....cz>
To: Crispin Cowan <crispin@...unix.com>
Cc: Hilmi Ozdoganoglu <cyprian@...due.edu>,
	Dave Paris <dparis@...orks.com>, bugtraq@...urityfocus.com
Subject: Re: http://www.smashguard.org


Hi!

> >The idea is not to create "custom CPUs" but to have our modification
> >picked up by major vendors.  Clearly there is interest in applying
> >hardware to solve security issues based on the latest press releases
> >from AMD that AMD chips include buffer-overflow protection (see
> >Computer World, January 15, 2004).
> >
> As Theo said, the AMD buffer overflow "protection" is nothing more than 
> sensible separation of R and X bits per page, fixing a glaring and 

Actually it is not "sensible", and it is not separation.

You can have r--, r-x, but you can't have --x.
								Pavel
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