Re: [websec] Authentic inter-domain relationships. Is this a security problem? Appropriate for websec?

Anne van Kesteren <annevk@annevk.nl> Wed, 14 January 2015 09:15 UTC

Return-Path: <annevk@annevk.nl>
X-Original-To: websec@ietfa.amsl.com
Delivered-To: websec@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 836AC1A89A8 for <websec@ietfa.amsl.com>; Wed, 14 Jan 2015 01:15:33 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.378
X-Spam-Level:
X-Spam-Status: No, score=-1.378 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FM_FORGED_GMAIL=0.622, RCVD_IN_DNSWL_NONE=-0.0001] autolearn=no
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 EO3xOu5EI3bG for <websec@ietfa.amsl.com>; Wed, 14 Jan 2015 01:15:32 -0800 (PST)
Received: from homiemail-a2.g.dreamhost.com (homie.mail.dreamhost.com [208.97.132.208]) by ietfa.amsl.com (Postfix) with ESMTP id 109481A6F96 for <websec@ietf.org>; Wed, 14 Jan 2015 01:15:31 -0800 (PST)
Received: from homiemail-a2.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a2.g.dreamhost.com (Postfix) with ESMTP id 873FD280072 for <websec@ietf.org>; Wed, 14 Jan 2015 01:15:31 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=annevk.nl; h=mime-version :in-reply-to:references:date:message-id:subject:from:to:cc: content-type; s=annevk.nl; bh=FM6t62pVVvGc+Cs8a3CrHGO0cEs=; b=ci eS2qROrSeC/Lpe2RYUuU/6jTxL4nYdjZZ4hb+EUoizSSP0dWFwdZRDcadpV8Snt7 DsOPFd66FOoFbgHSXkXFCnJ368/PuNrW7k2JhMGltUiocQPoeeJerMW0BLEHwJZs 5/3f8XddLjHwcVZgrmG+fZ1NZIlyTUpb2y5Ex6vCc=
Received: from mail-qc0-f173.google.com (mail-qc0-f173.google.com [209.85.216.173]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: annevk@annevk.nl) by homiemail-a2.g.dreamhost.com (Postfix) with ESMTPSA id 6BAC228006D for <websec@ietf.org>; Wed, 14 Jan 2015 01:15:31 -0800 (PST)
Received: by mail-qc0-f173.google.com with SMTP id i17so6323619qcy.4 for <websec@ietf.org>; Wed, 14 Jan 2015 01:15:30 -0800 (PST)
MIME-Version: 1.0
X-Received: by 10.224.28.198 with SMTP id n6mr4750499qac.15.1421226930657; Wed, 14 Jan 2015 01:15:30 -0800 (PST)
Received: by 10.229.68.194 with HTTP; Wed, 14 Jan 2015 01:15:30 -0800 (PST)
In-Reply-To: <CAL1pEULaTQ0NUe_zmEiEWfeY8dohdAMcC4MpZnLY32CX95PrJw@mail.gmail.com>
References: <CAL1pEULxwcStS6EDfYtpV+neU2izz2gLsJi2Ak7OVxB9x8MzhA@mail.gmail.com> <CADnb78hD=rTbu5RU1SYksDWYOjokM=f25R49XCCdO2xj+TVtyw@mail.gmail.com> <CAL1pEULaTQ0NUe_zmEiEWfeY8dohdAMcC4MpZnLY32CX95PrJw@mail.gmail.com>
Date: Wed, 14 Jan 2015 10:15:30 +0100
Message-ID: <CADnb78h=YBz90ZRwrefp8NnKUDZG5wLFZ2Hx+-wZnMfMFcFZMg@mail.gmail.com>
From: Anne van Kesteren <annevk@annevk.nl>
To: Chris Hartmann <cxhartmann@gmail.com>
Content-Type: text/plain; charset=UTF-8
Archived-At: <http://mailarchive.ietf.org/arch/msg/websec/3jUmIlhF_Zw09fqKNC4YxGGGVtE>
Cc: websec <websec@ietf.org>
Subject: Re: [websec] Authentic inter-domain relationships. Is this a security problem? Appropriate for websec?
X-BeenThere: websec@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Web Application Security Minus Authentication and Transport <websec.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/websec>, <mailto:websec-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/websec/>
List-Post: <mailto:websec@ietf.org>
List-Help: <mailto:websec-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/websec>, <mailto:websec-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 14 Jan 2015 09:15:33 -0000

On Tue, Jan 13, 2015 at 9:30 PM, Chris Hartmann <cxhartmann@gmail.com>; wrote:
> If a phisher
> sent you an email claiming to be okta.com with a link to a fake but
> believable hostname, say otka.com (see what I did there), you happen
> to click the link and are on the verge of providing your credentials,

Yeah, that's the concern.


> When yourcompany.com formed the business relationship with
> okta.com it could perhaps share a bit of digitally signed data, say
> digitally sign the url to the login page (www.okta.com/yourcompany)
> and embed that in response.

Given that the current address bar UI already has limited utility,
it's not clear to me what making it more complicated will actually
help users.


-- 
https://annevankesteren.nl/