linux-kernel - Re: Require mmap handler for a.out executables

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Date:	Thu, 27 Jul 2006 19:49:42 +0200
From:	Bodo Eggert <7eggert@...tempel.de>
To:	Marcel Holtmann <marcel@...tmann.org>,
	Linus Torvalds <torvalds@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>, Eugene Teo <eteo@...hat.com>
Subject: Re: Require mmap handler for a.out executables

Marcel Holtmann <marcel@...tmann.org> wrote:

> with the nasty /proc privilege escalation (CVE-2006-3626) it became
> clear that we need to do something more to better protect us against
> people exploiting stuff in /proc. Besides the don't allow chmod stuff,
> Eugene also proposed to depend the a.out execution on the existence of
> the mmap handler. Since we are doing the same for ELF, this makes
> totally sense to me.

Can shell scripts or binfmt_misc be exploited, too? Even if not, I'd
additionally force noexec, nosuid on proc and sysfs mounts.
-- 
Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF
verbreiteten Lügen zu sabotieren.

http://david.woodhou.se/why-not-spf.html
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