Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758227AbXIYPf2 (ORCPT ); Tue, 25 Sep 2007 11:35:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753739AbXIYPfN (ORCPT ); Tue, 25 Sep 2007 11:35:13 -0400 Received: from hawking.rebel.net.au ([203.20.69.83]:34263 "EHLO hawking.rebel.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753144AbXIYPfM (ORCPT ); Tue, 25 Sep 2007 11:35:12 -0400 Message-ID: <46F92AAB.1060903@davidnewall.com> Date: Wed, 26 Sep 2007 01:05:07 +0930 From: David Newall User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.2) Gecko/20070221 SeaMonkey/1.1.1 MIME-Version: 1.0 To: Alan Cox CC: "Serge E. Hallyn" , Bill Davidsen , Philipp Marek , 7eggert@gmx.de, majkls , bunk@fs.tum.de, linux-kernel@vger.kernel.org Subject: Re: Chroot bug References: <56705.193.171.152.61.1190289559.squirrel@webmail.marek.priv.at> <46F29A9A.4070806@davidnewall.com> <200709201817.17282@x5> <46F2B59F.8090709@davidnewall.com> <46F2DDD0.3030500@tmr.com> <46F380E4.4040606@davidnewall.com> <20070924213215.GA32716@vino.hallyn.com> <46F83474.5040503@davidnewall.com> <20070924230008.GA3160@vino.hallyn.com> <46F8BC8A.7080006@davidnewall.com> <20070925114947.GA9721@vino.hallyn.com> <46F91417.9050600@davidnewall.com> <46F924E3.50205@davidnewall.com> <20070925163040.12a3c2f8@the-village.bc.nu> In-Reply-To: <20070925163040.12a3c2f8@the-village.bc.nu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 662 Lines: 18 Alan Cox wrote: >> Marek's loading dynamic libraries, it seems clear that the prime purpose >> of chroot is to aid security. Being able to cd your way out is handy >> > > Does it - I can't find any evidence for that. It seems self-evident to me. What do you think is it prime purpose? > A root user can get out of a chroot a million different ways One of those ways shouldn't be that chroot lets you out. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/