oss-sec mailing list archives
Re: Plug-and-wipe and Secure Boot semantics
From: Florian Weimer <fweimer () redhat com>
Date: Wed, 19 Dec 2012 10:20:12 +0100
On 12/19/2012 06:39 AM, Greg KH wrote:
Most signed Linux boot loaders only verify the kernel (and, indirectly, code that's loaded into the kernel), but not the initrd contents.Given that there is only one public signed Linux boot loader, saying "most" is a bit odd here :)Uhm, aren't there a couple of them in circulation?Not that I know of, all of the "public" ones are based on Matthew Gerritt's code, do you know of another one that has made it through the Microsoft signing process?
I was mistaken, I assumed that Fedora was shipping Matthew's 0.1 code, which differs significantly from the 0.2 code. But it turns out that Fedora ships 0.2 instead (since the end of November). Oh well.
The Fedora 18 TC3 installer boots on the machine mentioned above, in the factory default configuration. Previous installer versions showed a Secure Boot error message. I've run into an installer bug, though: <https://bugzilla.redhat.com/show_bug.cgi?id=888232>Previous versions of Fedora 18 betas didn't have a valid signed bootloader to allow anything to be installed, are you sure it's all properly built now?
Yes, or the UEFI implementation on the box is buggy. It could not boot the installer before, but now it can.
But, more on-topic, how does UEFI secure boot have anything to do with this mailing list?
Aren't vendors basing their implementation on the open-source code from Intel? Or are you referring to the fact that Secure Boot has little to do with security?
-- Florian Weimer / Red Hat Product Security Team
Current thread:
- Plug-and-wipe and Secure Boot semantics Florian Weimer (Dec 18)
- Re: Plug-and-wipe and Secure Boot semantics Greg KH (Dec 18)
- Re: Plug-and-wipe and Secure Boot semantics Florian Weimer (Dec 18)
- Re: Plug-and-wipe and Secure Boot semantics Greg KH (Dec 18)
- Re: Plug-and-wipe and Secure Boot semantics Florian Weimer (Dec 19)
- Re: Plug-and-wipe and Secure Boot semantics Greg KH (Dec 19)
- Re: Plug-and-wipe and Secure Boot semantics Kurt Seifried (Dec 19)
- Re: Plug-and-wipe and Secure Boot semantics Florian Weimer (Dec 18)
- Re: Plug-and-wipe and Secure Boot semantics Greg KH (Dec 18)