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

[Mimi Zohar]

On Wed, 2014-06-11 at 03:22 +0100, Matthew Garrett wrote: 
> On Tue, Jun 10, 2014 at 09:24:53PM -0400, Mimi Zohar wrote:
> > On Tue, 2014-06-10 at 22:40 +0100, Matthew Garrett wrote: 
> > > The hole is that the system trusts keys that you don't trust. The 
> > > appropriate thing to do is to remove that trust from the entire system, 
> > > not just one layer of the system. If people gain the impression that 
> > > they can simply pass a kernel parameter and avoid trusting the vendor 
> > > keys, they'll be upset to discover that it's easily circumvented.
> > 
> > Assuming I remove all the keys I don't trust, there are still keys that
> > are trusted while booting, but are not necessary afterwards.  We should
> > be able to limit the scope of where and when keys are trusted.
> 
> Providing a userspace mechanism for selectively dropping keys from the 
> kernel seems like a good thing?

No, patch "KEYS: verify a certificate is signed by a 'trusted' key" adds
signed public keys.

Mimi

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