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From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
	Josh Boyer <jwboyer@redhat.com>,
	David Howells <dhowells@redhat.com>,
	Dmitry Kasatkin <d.kasatkin@samsung.com>,
	keyrings <keyrings@linux-nfs.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	linux-security-module <linux-security-module@vger.kernel.org>
Subject: Re: [PATCH 0/4] KEYS: validate key trust with owner and builtin keys only
Date: Wed, 11 Jun 2014 03:22:22 +0100	[thread overview]
Message-ID: <20140611022222.GA2349@srcf.ucam.org> (raw)
In-Reply-To: <1402449893.612.14.camel@dhcp-9-2-203-236.watson.ibm.com>

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?

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

  reply	other threads:[~2014-06-11  2:22 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-03 17:58 [RFC PATCH v5 0/4] ima: extending secure boot certificate chain of trust Mimi Zohar
2014-06-03 17:58 ` [RFC PATCH v5 1/4] KEYS: special dot prefixed keyring name bug fix Mimi Zohar
2014-06-06 21:48   ` Dmitry Kasatkin
2014-06-06 22:00     ` Mimi Zohar
2014-06-09  7:56       ` Dmitry Kasatkin
2014-06-09  8:17         ` Dmitry Kasatkin
2014-06-03 17:58 ` [RFC PATCH v5 2/4] KEYS: verify a certificate is signed by a 'trusted' key Mimi Zohar
2014-06-06 21:50   ` Dmitry Kasatkin
2014-06-09 13:13     ` Dmitry Kasatkin
2014-06-09 13:48       ` Mimi Zohar
2014-06-09 14:57         ` Dmitry Kasatkin
2014-06-03 17:58 ` [RFC PATCH v5 3/4] ima: define '.ima' as a builtin 'trusted' keyring Mimi Zohar
2014-06-06 21:53   ` Dmitry Kasatkin
2014-06-06 23:27     ` Mimi Zohar
2014-06-09  8:45       ` Dmitry Kasatkin
2014-06-03 17:58 ` [RFC PATCH v5 4/4] KEYS: define an owner trusted keyring Mimi Zohar
2014-06-09 12:13   ` Dmitry Kasatkin
2014-06-09 12:51     ` Mimi Zohar
2014-06-09 13:05       ` Dmitry Kasatkin
2014-06-09 13:48         ` Mimi Zohar
2014-06-09 13:58           ` Dmitry Kasatkin
2014-06-09 14:06             ` Dmitry Kasatkin
2014-06-09 16:33               ` Mimi Zohar
2014-06-10  8:48                 ` [PATCH 0/4] KEYS: validate key trust with owner and builtin keys only Dmitry Kasatkin
2014-06-10  8:48                   ` [PATCH 1/4] KEYS: define an owner trusted keyring Dmitry Kasatkin
2014-06-10 12:24                     ` Josh Boyer
2014-06-10 12:41                       ` Dmitry Kasatkin
2014-06-10 13:07                       ` Mimi Zohar
2014-06-10  8:48                   ` [PATCH 2/4] KEYS: fix couple of things Dmitry Kasatkin
2014-06-10  8:48                   ` [PATCH 3/4] KEYS: validate key trust only with selected owner key Dmitry Kasatkin
2014-06-12 16:03                     ` Vivek Goyal
2014-06-12 16:55                       ` Mimi Zohar
2014-06-12 17:00                         ` Vivek Goyal
2014-06-12 17:17                           ` Mimi Zohar
2014-06-12 17:23                             ` Vivek Goyal
2014-06-12 17:23                       ` Dmitry Kasatkin
2014-06-12 17:32                         ` Vivek Goyal
2014-06-12 17:37                           ` Mimi Zohar
2014-06-12 18:36                           ` Dmitry Kasatkin
2014-06-12 19:01                             ` Vivek Goyal
2014-06-12 19:04                               ` Dmitry Kasatkin
2014-06-12 19:05                               ` Vivek Goyal
2014-06-12 19:15                                 ` Dmitry Kasatkin
2014-06-10  8:48                   ` [PATCH 4/4] KEYS: validate key trust only with builtin keys Dmitry Kasatkin
2014-06-10 12:20                   ` [PATCH 0/4] KEYS: validate key trust with owner and builtin keys only Josh Boyer
2014-06-10 12:52                     ` Mimi Zohar
2014-06-10 13:21                       ` Dmitry Kasatkin
2014-06-10 13:29                         ` Josh Boyer
2014-06-10 14:53                           ` Mimi Zohar
2014-06-10 12:58                     ` Dmitry Kasatkin
2014-06-10 15:08                       ` Matthew Garrett
2014-06-10 20:39                     ` Dmitry Kasatkin
     [not found]                     ` <CACE9dm9Ff6b3J=05QfcgBv-c_y=5qGNq1-ZSfo4smtj34i1e-A@mail.gmail.com>
2014-06-10 20:40                       ` Matthew Garrett
2014-06-10 21:00                         ` Dmitry Kasatkin
2014-06-10 21:17                           ` Dmitry Kasatkin
2014-06-10 21:25                             ` Matthew Garrett
2014-06-10 21:34                               ` Dmitry Kasatkin
2014-06-10 21:40                                 ` Matthew Garrett
2014-06-10 21:45                                   ` Dmitry Kasatkin
2014-06-11  1:24                                   ` Mimi Zohar
2014-06-11  2:22                                     ` Matthew Garrett [this message]
2014-06-11  3:08                                       ` Mimi Zohar
2014-06-11  3:23                                         ` Matthew Garrett
2014-06-11 12:30                                           ` Mimi Zohar
2014-06-11 15:20                                             ` Matthew Garrett
2014-06-27 14:16                                         ` David Howells
2014-06-10 21:40                                 ` Dmitry Kasatkin
2014-06-10 12:45                   ` Mimi Zohar
2014-06-10 12:49                     ` Dmitry Kasatkin
2014-06-11 20:49                       ` Mimi Zohar

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