From: Florian Weimer <fw@deneb.enyo.de>
To: Lars Magne Ingebrigtsen <larsi@gnus.org>
Cc: emacs-devel@gnu.org
Subject: Re: Bug#766395: emacs/gnus: Uses s_client to for SSL.
Date: Sun, 26 Oct 2014 09:15:48 +0100 [thread overview]
Message-ID: <87egtvdz63.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <m3ppdgkuwf.fsf@stories.gnus.org> (Lars Magne Ingebrigtsen's message of "Sat, 25 Oct 2014 17:53:52 +0200")
* Lars Magne Ingebrigtsen:
> The proposed security manager would store certificate fingerprints, so
> detecting when a known server drops from TLS 1.2 to SSL 3.0 would
> presumably also be something we could warn about, just like we would
> warn when we drop from STARTTLS to unencrypted.
>
> "You are talking to imap:dea.gov via SSL 3.0 now, while last time you
> did this via TLS 1.2. This might mean that you're suffering from a
> Man-In-The-Middle attack. Still connect?"
Uhm, if this happens, the server has been downgraded. The handshake
will fail if a man-in-the-middle attempts to force the use of SSL 3.0,
and both ends support something newer. (As far as I can tell, Emacs
does not implement the vulnerable protocol downgrade code, unlike
browsers.)
next prev parent reply other threads:[~2014-10-26 8:15 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20141022193441.GA11872@roeckx.be>
2014-10-22 20:02 ` Bug#766395: emacs/gnus: Uses s_client to for SSL Rob Browning
2014-10-22 20:05 ` Rob Browning
2014-10-23 14:03 ` Ted Zlatanov
2014-10-23 15:57 ` Rob Browning
2014-10-24 13:39 ` Ted Zlatanov
2016-02-20 15:28 ` Kurt Roeckx
2016-02-21 2:47 ` Lars Ingebrigtsen
2017-02-22 20:38 ` Bug#766397: " Antoine Beaupre
2017-04-16 17:28 ` Rob Browning
2014-10-22 20:14 ` Stefan Monnier
2014-10-22 21:02 ` Andreas Schwab
2014-10-23 16:49 ` Andreas Schwab
2014-10-23 17:29 ` Lars Magne Ingebrigtsen
2014-10-23 20:36 ` Stefan Monnier
2014-10-24 7:01 ` Lars Magne Ingebrigtsen
2014-10-27 19:42 ` Filipp Gunbin
2014-10-23 16:34 ` Richard Stallman
2014-10-23 18:00 ` Florian Weimer
2014-10-23 18:37 ` Perry E. Metzger
2014-10-23 18:43 ` Florian Weimer
2014-10-23 18:57 ` Perry E. Metzger
2014-10-23 18:59 ` Florian Weimer
2014-10-23 19:11 ` Kurt Roeckx
2014-10-23 19:42 ` Perry E. Metzger
2014-10-23 19:50 ` Florian Weimer
2014-10-23 20:26 ` Perry E. Metzger
2014-10-23 21:05 ` Kurt Roeckx
2014-10-24 2:56 ` Perry E. Metzger
2014-10-23 21:48 ` Stephen J. Turnbull
2014-10-24 3:00 ` Perry E. Metzger
2014-10-24 20:51 ` Stephen J. Turnbull
2014-10-24 21:14 ` Perry E. Metzger
2014-10-24 21:33 ` Lars Magne Ingebrigtsen
2014-10-25 0:36 ` Perry E. Metzger
2014-10-25 15:27 ` Ted Zlatanov
2014-10-25 15:53 ` Lars Magne Ingebrigtsen
2014-10-26 8:15 ` Florian Weimer [this message]
2014-10-26 11:42 ` Lars Magne Ingebrigtsen
2014-10-26 12:45 ` Florian Weimer
2014-10-26 1:42 ` Richard Stallman
2014-10-26 7:38 ` Florian Weimer
2014-10-24 21:47 ` Stephen J. Turnbull
2014-10-25 0:42 ` Perry E. Metzger
2014-10-27 17:17 ` Stephen J. Turnbull
2014-10-27 19:39 ` Perry E. Metzger
2014-10-28 7:04 ` Stephen J. Turnbull
2014-10-28 7:45 ` Thien-Thi Nguyen
2014-10-28 8:44 ` Stephen J. Turnbull
2014-10-28 13:31 ` Stefan Monnier
2014-10-28 15:19 ` Perry E. Metzger
2014-10-28 15:33 ` Florian Weimer
2014-10-28 16:20 ` Perry E. Metzger
2014-10-28 16:52 ` Stefan Monnier
2014-10-28 17:11 ` Perry E. Metzger
2014-10-29 3:19 ` Stephen J. Turnbull
2014-10-28 15:10 ` Perry E. Metzger
2014-10-29 2:33 ` Stephen J. Turnbull
2014-10-29 3:06 ` Perry E. Metzger
2014-10-29 7:28 ` Stephen J. Turnbull
2014-10-29 11:19 ` Perry E. Metzger
2014-10-23 19:03 ` Kurt Roeckx
2014-10-24 13:35 ` Ted Zlatanov
2014-10-25 7:31 ` Richard Stallman
2014-10-25 14:33 ` Perry E. Metzger
2014-10-25 15:49 ` removing SSLv3 support by default from the Emacs GnuTLS integration (was: Bug#766395: emacs/gnus: Uses s_client to for SSL.) Ted Zlatanov
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