Re: [PATCH 0/4] KEYS: validate key trust with owner and builtin keys only

Matthew Garrett
2014-06-10T20:40:38Z

On Tue, Jun 10, 2014 at 11:34:17PM +0300, Dmitry Kasatkin wrote:

> Preventing loading keys from uefi except dbx by default actually improves
> security. Adding kernel parameter to read db we make system more
> vulnerable.

It only adds security if you're performing a measured boot and remote
attestation. Otherwise you implicitly trust that key anyway. In almost
all cases refusing to trust db gives you a false sense of security
without any real improvement. I don't think it's obvious it should be
the default.

--
Matthew Garrett | mjg59@srcf.ucam.org