From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vivek Goyal Subject: Re: [RFC] Second attempt at kernel secure boot support Date: Fri, 2 Nov 2012 10:55:32 -0400 Message-ID: <20121102145532.GE3300@redhat.com> References: <1348152065-31353-1-git-send-email-mjg@redhat.com> <2548314.3caaFsMVg6@linux-lqwf.site> <50919EED.3020601@genband.com> <36538307.gzWq1oO7Kg@linux-lqwf.site> <1351760905.2391.19.camel@dabdike.int.hansenpartnership.com> <1351762703.2391.31.camel@dabdike.int.hansenpartnership.com> <1351763954.2391.37.camel@dabdike.int.hansenpartnership.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-security-module-owner@vger.kernel.org To: Eric Paris Cc: James Bottomley , Jiri Kosina , Oliver Neukum , Chris Friesen , Alan Cox , Matthew Garrett , Josh Boyer , linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, linux-efi@vger.kernel.org List-Id: linux-efi@vger.kernel.org On Thu, Nov 01, 2012 at 10:29:17AM -0400, Eric Paris wrote: > On Thu, Nov 1, 2012 at 5:59 AM, James Bottomley > wrote: > > > But that doesn't really help me: untrusted root is an oxymoron. > > Imagine you run windows and you've never heard of Linux. You like > that only windows kernels can boot on your box and not those mean > nasty hacked up malware kernels. Now some attacker manages to take > over your box because you clicked on that executable for young models > in skimpy bathing suits. That executable rewrote your bootloader to > launch a very small carefully crafted Linux environment. This Rewrote bootloader on disk so that it gets executed next time? It will not run as signature will not match. Thanks Vivek