From: gdt@work.lexort.com
Cc: Daiki Ueno <ueno@unixuser.org>,
fw@deneb.enyo.de, jas@extundo.com,
satyaki@chicory.stanford.edu, ding@gnus.org,
Reiner.Steib@gmx.de, emacs-devel@gnu.org
Subject: Re: Security flaw in pgg-gpg-process-region?
Date: Wed, 06 Sep 2006 15:33:46 -0400 [thread overview]
Message-ID: <smubqpshjs5.fsf@linuxpal.mit.edu> (raw)
In-Reply-To: <E1GL2iA-0000uI-22@fencepost.gnu.org> (Richard Stallman's message of "Wed, 06 Sep 2006 15:05:22 -0400")
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I think there's a higher-level point that hasn't been made explicit,
although I'm sure it's what Daiki is thinking: Anything that can cause
the passphrase to be written to the filesystem is horribly broken; the
whole point of the passphrase is that while the secret key (encrypted
in the passphrase) is on disk, without the passphrase one can't get
the key even if one has the disk. As soon as the passphrase ends up
on disk, through a temp file, core file, swap space, the plan is
compromised. Programs like gnupg take care to mlock(2) or similar to
keep key data from being paged out. (One also needs to disable kernel
crash dumps.)
The right solution might instead be to push for gpg-agent to be
production ready, so that entire notion of emacs dealing with
passphrases can be deprecated.
--
Greg Troxel <gdt@work.lexort.com>
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next prev parent reply other threads:[~2006-09-06 19:33 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <b4maca88q6i.fsf@jpl.org>
[not found] ` <def1aabc-69b9-4b1d-bb84-e65c63540eac@well-done.deisui.org>
[not found] ` <b4mmze82cse.fsf@jpl.org>
[not found] ` <b4mwtdbfqob.fsf@jpl.org>
[not found] ` <9c79059a-61a9-4fa4-8376-638753320a14@well-done.deisui.org>
[not found] ` <b4mpsj3gw1s.fsf@jpl.org>
[not found] ` <b4my7xrfg5o.fsf@jpl.org>
[not found] ` <4aaf7080-0e3d-4a75-aff5-f9d5bcd0437f@well-done.deisui.org>
[not found] ` <87fyjz2gaj.fsf@pacem.orebokech.com>
[not found] ` <v9iroj49cz.fsf@marauder.physik.uni-ulm.de>
2006-09-02 11:16 ` Security flaw in pgg-gpg-process-region? (was: pgg-gpg-process-region) Reiner Steib
2006-09-02 13:16 ` Security flaw in pgg-gpg-process-region? Daiki Ueno
2006-09-02 13:49 ` Daiki Ueno
2006-09-03 15:16 ` Richard Stallman
2006-09-04 1:36 ` Daiki Ueno
2006-09-04 17:18 ` Richard Stallman
2006-09-04 17:45 ` Daiki Ueno
2006-09-04 17:48 ` David Kastrup
2006-09-05 5:06 ` Daiki Ueno
2006-09-05 15:10 ` Chong Yidong
2006-09-06 8:49 ` Richard Stallman
2006-09-06 9:25 ` Daiki Ueno
2006-09-07 6:54 ` Richard Stallman
2006-09-06 8:49 ` Richard Stallman
2006-09-03 15:16 ` Security flaw in pgg-gpg-process-region? (was: pgg-gpg-process-region) Richard Stallman
2006-09-03 16:28 ` Security flaw in pgg-gpg-process-region? Florian Weimer
2006-09-04 2:04 ` Daiki Ueno
2006-09-04 2:25 ` Miles Bader
2006-09-05 9:43 ` Richard Stallman
2006-09-05 11:57 ` Daiki Ueno
2006-09-06 19:05 ` Richard Stallman
2006-09-06 19:33 ` gdt [this message]
2006-09-06 21:33 ` Miles Bader
2006-09-07 21:13 ` Richard Stallman
2006-09-19 10:02 ` Sascha Wilde
2006-09-19 22:56 ` Richard Stallman
2006-11-11 22:00 ` Sascha Wilde
2006-11-12 21:12 ` Richard Stallman
2006-11-12 21:38 ` Sascha Wilde
2006-11-13 20:15 ` Richard Stallman
2006-11-14 11:11 ` Sascha Wilde
2006-09-06 22:44 ` Daiki Ueno
2006-09-07 21:14 ` Richard Stallman
2006-09-06 20:11 ` Florian Weimer
2006-09-07 14:12 ` Chong Yidong
2006-09-07 21:13 ` Richard Stallman
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