From: Bernd Eckenfels <ecki@calista.eckenfels.6bone.ka-ip.net>
To: linux-kernel@vger.kernel.org
Subject: Re: Why Sysrq+k does not offer a trusted path
Date: Mon, 29 Sep 2003 09:20:12 +0200 [thread overview]
Message-ID: <E1A3sKK-0004Tn-00@calista.inka.de> (raw)
In-Reply-To: <Pine.LNX.4.44.0309290836460.16991-100000@picard.science-computing.de>
In article <Pine.LNX.4.44.0309290836460.16991-100000@picard.science-computing.de> you wrote:
> Thus it is a more secure way to offer a real SAK.
Well, root can still disabled it, for example by debugging kernel memory.
Generally, unless you ise priveledges, you cant avoid having root disable
SAK. But this is not the real problem anyway. SAK is supposed to protect
users from other non priveledged users. The main problem with SAK are
various graphical console modes, which cant be easyly restored. I think
currently SAK is not interpreted in all keyboard modes, do avoid somebody to
kill off the console in a inconsitent state. There are for example some
X-Servers which need to reset the text mode by themself or the display is
lost.
Greetings
Bernd
--
eckes privat - http://www.eckes.org/
Project Freefire - http://www.freefire.org/
next prev parent reply other threads:[~2003-09-29 7:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-29 6:53 Oliver Tennert
2003-09-29 7:20 ` Bernd Eckenfels [this message]
2003-09-29 7:21 ` viro
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