Re: [DNSOP] draft-fujiwara-dnsop-delegation-information-signer

Bob Harold <rharolde@umich.edu> Wed, 04 November 2020 16:10 UTC

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From: Bob Harold <rharolde@umich.edu>
Date: Wed, 4 Nov 2020 11:10:45 -0500
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To: fujiwara@jprs.co.jp
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Subject: Re: [DNSOP] draft-fujiwara-dnsop-delegation-information-signer
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If an attacker is spoofing responses, it seems that they could send a
different NS and A record, and a new calculated DS hash.  So this provides
no protection against spoofing?

We would need instead (or in addition) an RRSIG record to actually protect
this.

An example would help.

-- 
Bob Harold
DNS and DHCP Hostmaster - UMNet
Information and Technology Services (ITS)
rharolde@umich.edu   734-512-7038


On Tue, Nov 3, 2020 at 11:31 PM <fujiwara@jprs.co.jp> wrote:

> I submitted draft-fujiwara-dnsop-delegation-information-signer-00.
>
> Name:           draft-fujiwara-dnsop-delegation-information-signer
> Revision:       00
> Title:          Delegation Information (Referrals) Signer for DNSSEC
> Document date:  2020-11-03
> Group:          Individual Submission
> Pages:          6
> URL:
> https://www.ietf.org/archive/id/draft-fujiwara-dnsop-delegation-information-signer-00.txt
>
> DNSSEC does not have a function to validate delegation information.
> I think it is a large missing peace of DNSSEC.
>
> I have a question why we did not include signature validation function
> to delegation information ?
>
> Probably, because it is non-authoritative information.
> Or, because it was difficult to define the necessary and sufficient
> delegation information.
>
> It is now widely agreed (although not explicitly documented) that the
> delegation information is the information used for name resolution and
> does not result in name resolution.
>
> We have a word "in-domain" glue which is the necessary and sufficient glue.
>
> And the idea may offer the signature for root priming data.
>
> If someone interested the document, I would like time slot at dnsop WG
> meeting.
>
> Regards,
>
> --
> Kazunori Fujiwara, JPRS <fujiwara@jprs.co.jp>
>
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