linux-kernel - Re: [RFC] Second attempt at kernel secure boot support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20121101162901.GE13132@srcf.ucam.org>
Date:	Thu, 1 Nov 2012 16:29:01 +0000
From:	Matthew Garrett <mjg@...hat.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	James Bottomley <James.Bottomley@...senPartnership.com>,
	Eric Paris <eparis@...isplace.org>,
	Jiri Kosina <jkosina@...e.cz>, Oliver Neukum <oneukum@...e.de>,
	Chris Friesen <chris.friesen@...band.com>,
	Josh Boyer <jwboyer@...il.com>, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-efi@...r.kernel.org
Subject: Re: [RFC] Second attempt at kernel secure boot support

On Thu, Nov 01, 2012 at 03:06:54PM +0000, Alan Cox wrote:
> > The entire point of this feature is that it's no longer possible to turn 
> > a privileged user exploit into a full system exploit. Gaining admin 
> > access on Windows 8 doesn't permit you to install a persistent backdoor, 
> 
> Really, that would be a first. Do you have a detailed knowledge of
> windows 8 actual security ?

http://msdn.microsoft.com/en-us/library/windows/desktop/hh848061%28v=vs.85%29.aspx

> > unless there's some way to circumvent that. Which there is, if you can 
> > drop a small Linux distribution onto the ESP and use a signed, trusted 
> > bootloader to boot a signed, trusted kernel that then resumes from an 
> > unsigned, untrusted hibernate image. So we have to ensure that that's 
> > impossible.
> 
> Well if you want to make Linux entirely robust Red Hat could start
> helping with some of the 6000 odd coverity matches some of which will
> most certainly turn out to be real flaws.

Sure, bugs should be fixed.

-- 
Matthew Garrett | mjg59@...f.ucam.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/