Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757552AbXFIXDi (ORCPT ); Sat, 9 Jun 2007 19:03:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753361AbXFIXD0 (ORCPT ); Sat, 9 Jun 2007 19:03:26 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:33831 "EHLO amd.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753351AbXFIXDZ (ORCPT ); Sat, 9 Jun 2007 19:03:25 -0400 Date: Sun, 10 Jun 2007 01:02:39 +0200 From: Pavel Machek To: david@lang.hm Cc: Crispin Cowan , James Morris , Alan Cox , Andi Kleen , Casey Schaufler , linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: AppArmor FAQ Message-ID: <20070609230239.GA21229@elf.ucw.cz> References: <20070417181016.GA10903@one.firstfloor.org> <657751.18080.qm@web36614.mail.mud.yahoo.com> <20070417211653.GB11944@one.firstfloor.org> <20070417225815.000b0fdb@the-village.bc.nu> <4626746A.9010701@novell.com> <20070609210151.GB6663@elf.ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1798 Lines: 40 Hi! > >>>>I'm not sure if AppArmor can be made good security for the general case, > >>>>but it is a model that works in the limited http environment > >>>>(eg .htaccess) and is something people can play with and hack on and may > >>>>be possible to configure to be very secure. > >>>> > >>>Perhaps -- until your httpd is compromised via a buffer overflow or > >>>simply misbehaves due to a software or configuration flaw, then the > >>>assumptions being made about its use of pathnames and their security > >>>properties are out the window. > >>> > >>How is it that you think a buffer overflow in httpd could allow an > >>attacker to break out of an AppArmor profile? This is exactly what > >>AppArmor was designed to do, and without specifics, this is just > >>FUD. > > > >No, it is not, I already broke AppArmor once, and it took me less then > >one hour. > > > >Give me machine with root shell, and make app armor permit everything > >but reading /etc/secret.file. AppArmor is not designed for this, but > >if you want to claim your solution works, this looks like a nice test. > > > >Actually, give password to everyone, and see who breaks it first. > > you admit that AA isn't designed for this and then you set this as the > test, doesn't that seem unreasonable to you? httpd's run at root priviledge, AFAICT, and Crispin just accused someone of spreading fud. Exploited httpd is root shell. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - 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/