Re: [secdir] [taugh.com-standards] Security review of draft-levine-herkula-oneclick-05

"John R. Levine" <johnl@iecc.com> Sun, 18 September 2016 17:13 UTC

Return-Path: <johnl@iecc.com>
X-Original-To: secdir@ietfa.amsl.com
Delivered-To: secdir@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0346F12B130 for <secdir@ietfa.amsl.com>; Sun, 18 Sep 2016 10:13:57 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.001
X-Spam-Level:
X-Spam-Status: No, score=-2.001 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1536-bit key) header.d=iecc.com
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 7dRFzAMqOenz for <secdir@ietfa.amsl.com>; Sun, 18 Sep 2016 10:13:56 -0700 (PDT)
Received: from miucha.iecc.com (abusenet-1-pt.tunnel.tserv4.nyc4.ipv6.he.net [IPv6:2001:470:1f06:1126::2]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D5ABA128B38 for <secdir@ietf.org>; Sun, 18 Sep 2016 10:13:55 -0700 (PDT)
Received: (qmail 15406 invoked from network); 18 Sep 2016 17:07:12 -0000
DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=iecc.com; h=date:message-id:from:to:cc:subject:in-reply-to:references:mime-version:content-type:user-agent; s=3c2d.57dec9c0.k1609; bh=sSurJdrVJxQyo/mJWl5wy5KIp4fwLi8ev9XdXcngNfI=; b=wWbHjGfaSFoHDP+7ut7SFa9jURNigcD9R8e7Fvk4ACf2fJkFrp0OcLyfIcN4ngYLrrfrEMqu0jJ10s/r403vBpcQBgxeYSBjiqRNnpGd3E2aHkljwowwtiWJLPelh0/facoTyJFkb1AbmACq5nD8rRBzl/A2cFFn+NeoJssVe9afe2WLEyKdJ+wdEoU3wlxdfCEx619yQQw1IR/1UUvSwyerWWyZuTbMIanQ/yBQHl+ZLlRIeLJQAqHyU386uGNr
Received: from localhost ([IPv6:2001:470:1f07:1126::78:696d:6170]) by imap.iecc.com ([IPv6:2001:470:1f07:1126::78:696d:6170]) with ESMTPS (TLS1.0/X.509/SHA1) via TCP6; 18 Sep 2016 17:07:12 -0000
Date: Sun, 18 Sep 2016 13:07:13 -0400
Message-ID: <alpine.OSX.2.11.1609181306500.4660@ary.lan>
From: "John R. Levine" <johnl@iecc.com>
To: Ben Laurie <benl@google.com>
In-Reply-To: <CABrd9SSFCb7XdVFmLW6-OAtoo_7d-=Uivq0ax2v6iJKx=TusUg@mail.gmail.com>
References: <CABrd9SQt9K+78WOm9aO_fObrvThKCVKyXAVF6WVmm=bN8c9bvw@mail.gmail.com> <alpine.OSX.2.11.1609181216340.4398@ary.lan> <CABrd9SSFCb7XdVFmLW6-OAtoo_7d-=Uivq0ax2v6iJKx=TusUg@mail.gmail.com>
User-Agent: Alpine 2.11 (OSX 23 2013-08-11)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset="US-ASCII"; format="flowed"
Archived-At: <https://mailarchive.ietf.org/arch/msg/secdir/_0aFSqDMoOLrUwbpP_o1HBKg_YA>
Cc: draft-levine-herkula-oneclick.all@ietf.org, Paul Kincaid-Smith <paulkincaidsmith@gmail.com>, The IESG <iesg@ietf.org>, "secdir@ietf.org" <secdir@ietf.org>
Subject: Re: [secdir] [taugh.com-standards] Security review of draft-levine-herkula-oneclick-05
X-BeenThere: secdir@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Security Area Directorate <secdir.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/secdir>, <mailto:secdir-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/secdir/>
List-Post: <mailto:secdir@ietf.org>
List-Help: <mailto:secdir-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/secdir>, <mailto:secdir-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sun, 18 Sep 2016 17:13:57 -0000

>> I don't think that's right.  The usual way to verify a 2369 unsubscribe is
>> to ask for confirmation, either in a web page if the URI is an http or
>> https, or by writing back if it's mailto:.  That doesn't change for the
>> current GET syntax of 2369.
>
> If the goal is to prevent spoofed mails leading to unsubscription,
> then it applies in either case.

It's only a goal here because they have other ways to do it if it's not 
one-click.

Regards,
John Levine, johnl@iecc.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly