[TLS] Another IRINA bug in TLS

Watson Ladd <watsonbladd@gmail.com> Wed, 20 May 2015 14:06 UTC

Return-Path: <watsonbladd@gmail.com>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4CA771A701D for <tls@ietfa.amsl.com>; Wed, 20 May 2015 07:06:16 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -0.101
X-Spam-Level:
X-Spam-Status: No, score=-0.101 tagged_above=-999 required=5 tests=[BAYES_40=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, SPF_PASS=-0.001] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GVzTRPKWry_N for <tls@ietfa.amsl.com>; Wed, 20 May 2015 07:06:14 -0700 (PDT)
Received: from mail-wi0-x22f.google.com (mail-wi0-x22f.google.com [IPv6:2a00:1450:400c:c05::22f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7D7421A7D83 for <tls@ietf.org>; Wed, 20 May 2015 07:05:26 -0700 (PDT)
Received: by wicmx19 with SMTP id mx19so156269088wic.0 for <tls@ietf.org>; Wed, 20 May 2015 07:05:25 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=ZEEEsJxaZKkV7ImDCYK6JpQyjqTP3Q8TApvrpfvUFQE=; b=A0Ux9RvkeuQN2Dn263GYdZW/aFTaW53FMld26TUkEK4yJN4+vgL6rRYf4lZJ2xXQYO KJ5h5qNMFe+Qw/3PAxFsdS5WsUMf2F05lMtniZniks6UBiW0B9st6iCvgWiQjFcuw0gS w5jwXGHZE7UjgysvcgtPazUzulMvqyD4E/5Xgv1p/vhxW7D1Oq97YntqZXA0GU0LSDuq i+wG7cyGBODxe7mTHR5tLI1W+hJm4YihUhR6TCzTR4B8ZjazZ8YcyAYQYEnXHN4+y3ub NqAg/0k3SNdLMn6Z8CAJ2zequZEvatuuTzfwAhnl1ICOjB563Mi0sZbk3pfnjxmn8QtR Llag==
MIME-Version: 1.0
X-Received: by 10.194.248.227 with SMTP id yp3mr187776wjc.32.1432130725186; Wed, 20 May 2015 07:05:25 -0700 (PDT)
Received: by 10.194.20.97 with HTTP; Wed, 20 May 2015 07:05:25 -0700 (PDT)
Date: Wed, 20 May 2015 10:05:25 -0400
Message-ID: <CACsn0ckaML0M_Foq9FXs5LA2dRb1jz+JDX7DUej_ZbuSkUB=tQ@mail.gmail.com>
From: Watson Ladd <watsonbladd@gmail.com>
To: "tls@ietf.org" <tls@ietf.org>
Content-Type: text/plain; charset="UTF-8"
Archived-At: <http://mailarchive.ietf.org/arch/msg/tls/MDGZtBweV-z4J141A0bexfOz43E>
Subject: [TLS] Another IRINA bug in TLS
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: "This is the mailing list for the Transport Layer Security working group of the IETF." <tls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tls>, <mailto:tls-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/tls/>
List-Post: <mailto:tls@ietf.org>
List-Help: <mailto:tls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tls>, <mailto:tls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 20 May 2015 14:06:16 -0000

https://weakdh.org/

Transcript hashing will solve this problem. In the meantime, you want
to turn off DH_EXPORT. There are also implications for false start.
Chrome has already announced countermeasures. I'm pretty sure this
won't be the last issue of this nature.

Sincerely,
Watson Ladd