From: Werner Almesberger <wa@almesberger.net>
To: Julien Oster <frodoid@frodoid.org>
Cc: Robert Love <rml@tech9.net>, Julien Oster <frodo@dereference.de>,
linux-kernel@vger.kernel.org
Subject: Re: kernel ring buffer accessible by users
Date: Wed, 23 Apr 2003 13:45:30 -0300 [thread overview]
Message-ID: <20030423134530.C3557@almesberger.net> (raw)
In-Reply-To: <20030423160556.GA30306@frodo.midearth.frodoid.org>; from frodoid@frodoid.org on Wed, Apr 23, 2003 at 06:05:56PM +0200
Julien Oster wrote:
> Of course one could say "then let's just stop writing out anything in
> the kernel buffer that COULD be sensitive", but I think this would
> actually castrate the meaning of such a buffer.
It's also bad security design to try to plug hundreds of potential
leaks, instead of the one common channel they share.
> And there's stillt he possibility to tweak the permissions for
> dmesg so that only a certain group (staff, operator, adm...) can execute
> it, but then setuid root.
Yes, but you'll get quite a few objections to adding yet another
suid root program :-)
- Werner
--
_________________________________________________________________________
/ Werner Almesberger, Buenos Aires, Argentina wa@almesberger.net /
/_http://www.almesberger.net/____________________________________________/
next prev parent reply other threads:[~2003-04-23 16:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-22 16:21 kernel ring buffer accessible by users Julien Oster
2003-04-22 16:44 ` Michael Buesch
2003-04-22 16:52 ` Grzegorz Jaskiewicz
2003-04-22 16:54 ` Jörn Engel
2003-04-22 16:54 ` Julien Oster
2003-04-22 17:54 ` Richard B. Johnson
2003-04-22 17:17 ` Robert Love
2003-04-23 15:56 ` Werner Almesberger
2003-04-23 15:59 ` Robert Love
2003-04-23 16:23 ` Werner Almesberger
2003-04-24 0:30 ` David Wagner
2003-04-24 14:02 ` Grzegorz Jaskiewicz
2003-04-23 16:05 ` Julien Oster
2003-04-23 16:45 ` Werner Almesberger [this message]
2003-04-23 16:59 ` Frank v Waveren
2003-04-24 0:31 ` David Wagner
2003-04-24 13:10 ` Stephan von Krawczynski
2003-04-22 19:53 ` Jason Cook
2003-04-23 9:33 ` Olaf Hering
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