Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759090AbXIYPrr (ORCPT ); Tue, 25 Sep 2007 11:47:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755958AbXIYPrk (ORCPT ); Tue, 25 Sep 2007 11:47:40 -0400 Received: from sovereign.computergmbh.de ([85.214.69.204]:36038 "EHLO sovereign.computergmbh.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752559AbXIYPrj (ORCPT ); Tue, 25 Sep 2007 11:47:39 -0400 Date: Tue, 25 Sep 2007 17:47:38 +0200 (CEST) From: Jan Engelhardt To: Alan Cox cc: David Newall , "Serge E. Hallyn" , Bill Davidsen , Philipp Marek , 7eggert@gmx.de, majkls , bunk@fs.tum.de, linux-kernel@vger.kernel.org Subject: Re: Chroot bug In-Reply-To: <20070925164806.4cadc6a5@the-village.bc.nu> Message-ID: 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> <46F92AAB.1060903@davidnewall.com> <20070925164806.4cadc6a5@the-village.bc.nu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 882 Lines: 25 On Sep 25 2007 16:48, Alan Cox wrote: >David Newall wrote: >> 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? > >Debugging and testing. At least that is as I understand it much of where >it came from. > >>> A root user can get out of a chroot a million different ways Uhm, you _do_ have considered the case of setuid(non-0)-after-chroot, have not you? - 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/