From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Cc: Josh Boyer <jwboyer@redhat.com>,
David Howells <dhowells@redhat.com>,
Mimi Zohar <zohar@linux.vnet.ibm.com>,
Dmitry Kasatkin <d.kasatkin@samsung.com>,
keyrings@linux-nfs.org, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org
Subject: Re: [PATCH 0/4] KEYS: validate key trust with owner and builtin keys only
Date: Tue, 10 Jun 2014 21:40:21 +0100 [thread overview]
Message-ID: <20140610204021.GA8916@srcf.ucam.org> (raw)
In-Reply-To: <CACE9dm9Ff6b3J=05QfcgBv-c_y=5qGNq1-ZSfo4smtj34i1e-A@mail.gmail.com>
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
next prev parent reply other threads:[~2014-06-10 20:40 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 [this message]
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
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140610204021.GA8916@srcf.ucam.org \
--to=mjg59@srcf.ucam.org \
--cc=d.kasatkin@samsung.com \
--cc=dhowells@redhat.com \
--cc=dmitry.kasatkin@gmail.com \
--cc=jwboyer@redhat.com \
--cc=keyrings@linux-nfs.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=zohar@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox