Re: [gentoo-dev] UEFI secure boot and Gentoo

[Maxim Kammerer <mk@dee.su>]

On Fri, Jun 15, 2012 at 3:01 PM, Rich Freeman <rich0@gentoo.org> wrote:
> I think that anybody that really cares about security should be
> running in custom mode anyway, and should just re-sign anything they
> want to run.  Custom mode lets you clear every single key in the
> system from the vendor on down, and gives you the ability to ensure
> the system only boots stuff you want it to.

I have several questions, that hopefully someone familiar with UEFI
Secure Boot is able to answer. If I understand UEFI correctly, the
user will need to not just re-sign bootloaders, but also the
OS-neutral drivers (e.g., UEFI GOP), which are hardware-specific, and
will be probably signed with Microsoft keys, since the hardware vendor
would otherwise need to implement expensive key security measures — is
that correct? If the user does not perform this procedure (due to its
complexity and/or lack of tools automating the process), is it
possible for an externally connected device to compromise the system
by supplying a Microsoft-signed blob directly to the UEFI firmware,
circumventing the (Linux) OS? Is it possible to develop an automatic
re-signing tool — i.e., does the API support all needed features
(listing / extracting drivers, revoking keys, adding keys, etc.)?

-- 
Maxim Kammerer
Liberté Linux: http://dee.su/liberte