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From: Simon Josefsson <simon@josefsson.org>
To: Arnaud Ebalard <arno@natisbad.org>
Cc: Daiki Ueno <ueno@unixuser.org>,
	 499774@bugs.debian.org,  RISKO Gergely <risko@debian.org>,
	 ding@gnus.org
Subject: Bug#499774: starttls is a joke
Date: Mon, 22 Sep 2008 18:38:44 +0200	[thread overview]
Message-ID: <87fxnsjfu3.fsf@mocca.josefsson.org> (raw)
In-Reply-To: <87tzc8upgf.fsf@marauder.physik.uni-ulm.de> (Reiner Steib's message of "Mon, 22 Sep 2008 18:15:28 +0200")

Reiner Steib <reinersteib+gmane@imap.cc> writes:

> Would it make sense to prefer gnutls-cli and warn when using starttls
> (if gnutls-cli is not installed)?

Possibly, yes.

Note that emacs22 (the version in debian testing) supports both starttls
and gnutls-cli, so the comment made earlier that removing the starttls
package will break imaps/pop3s connections from emacs based muas is
false.

>> "This software does not have any authentication capabilities: it does
>> not allow you to authenticate your peer, which is a basic requirement
>> for TLS/SSL to be used securely. You should only use it for testing
>> purposes and not relaying important information. Be aware that you are
>> vulnerable to MITM when using it"

That seems correct to me.

Note that even if you use gnutls-cli, you need to configure it to use
appropriate trust anchors to get full security.  If you don't, I believe
gnutls-cli is still superior to starttls though, since gnutls-cli verify
that the server hostname match the hostname in the certificate.

/Simon




  reply	other threads:[~2008-09-22 16:38 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-22  8:52 Arnaud Ebalard
2008-09-22  9:13 ` RISKO Gergely
2008-09-22  9:49   ` Arnaud Ebalard
2008-09-22 10:43   ` Arnaud Ebalard
2008-09-22 16:15     ` Reiner Steib
2008-09-22 16:38       ` Simon Josefsson [this message]
2008-09-22 17:48         ` Arnaud Ebalard
2008-10-02 10:04           ` Simon Josefsson
2008-10-07 20:43             ` Matthias Andree
2008-10-07 22:41               ` Simon Josefsson
2008-10-08 10:45                 ` Matthias Andree
2008-10-08 11:55                   ` Arnaud Ebalard
2008-10-07 20:41       ` Matthias Andree
2008-10-08  5:54         ` Arnaud Ebalard
2008-09-23 17:18     ` Riskó Gergely
2008-09-23 14:43   ` Uwe Brauer
2008-09-24  3:39     ` Sebastian Krause
2008-09-26 13:19       ` Uwe Brauer
2008-09-26 13:25         ` Sebastian Krause
2008-09-26 21:16           ` Uwe Brauer
2008-09-26 23:27             ` Sebastian Krause
2008-09-26 15:09         ` Magnus Henoch
2008-09-26 21:14           ` Uwe Brauer

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