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Re: [Acme] Looking for comments on https://github.com/ietf-wg-acme/acme/issues/215

Daniel McCarney <cpu@letsencrypt.org> Mon, 05 December 2016 19:51 UTC

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From: Daniel McCarney <cpu@letsencrypt.org>
Date: Mon, 05 Dec 2016 14:50:59 -0500
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To: Richard Barnes <rlb@ipv.sx>
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Cc: "Salz, Rich" <rsalz@akamai.com>, Patrick Figel <patrick@figel.email>, IETF ACME <acme@ietf.org>
Subject: Re: [Acme] Looking for comments on https://github.com/ietf-wg-acme/acme/issues/215
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Speaking on behalf of Let's Encrypt, we wouldn't be supportive of the change
outlined in #215. We share Patrick's concerns about servers with default
vhosts.

On Sat, Dec 3, 2016 at 5:42 PM, Richard Barnes <rlb@ipv.sx> wrote:

> I find these objections pretty persuasive.  Inclined to WONTFIX.
>
> On Sat, Dec 3, 2016 at 7:35 AM, Patrick Figel <patrick@figel.email> wrote:
>
>> I wrote together some thoughts on this proposal here[1]. In short, I
>> think it's
>> vulnerable to the default vhost attack that caused simpleHTTP to be
>> dropped, and
>> it's not compatible with the "Agreed-Upon Change to Website" method
>> described
>> in the BRs, which would prevent adoption by any publicly-trusted CA.
>>
>> The proposed workaround for this issue[2] would make this a variant of
>> tls-sni,
>> AIUI, which already has these pseudo-hostnames, so I think we're down to
>> "allow
>> other ports" here, and I believe there's consensus against this.
>>
>> Patrick
>>
>> [1]: https://mailarchive.ietf.org/arch/msg/acme/QiXu84RJtURfGVVEY
>> fSpRdtcU5o
>> [2]: https://mailarchive.ietf.org/arch/msg/acme/NFKJ5sqBePGlJglKR
>> wodc5m4ZEo
>>
>> On Sat, Dec 3, 2016 at 3:18 AM, Salz, Rich <rsalz@akamai.com> wrote:
>> > With the couple of recent pull requests, the document editors are about
>> to
>> > close all but on issue, #215.
>> >
>> >
>> >
>> > Does the WG have any feelings on this?  Is it something we need to
>> address
>> > NOW, or can we add a new type of challenge later on if there’s interest?
>> >
>> >
>> >
>> > Please reply on-list by earl next week.
>> >
>> >
>> >
>> > --
>> >
>> > Senior Architect, Akamai Technologies
>> >
>> > Member, OpenSSL Dev Team
>> >
>> > IM: richsalz@jabber.at Twitter: RichSalz
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > Acme mailing list
>> > Acme@ietf.org
>> > https://www.ietf.org/mailman/listinfo/acme
>> >
>>
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