Re: [Add] draft-ietf-add-resolver-info-09

[[e-mail]]

Hi Mark, all, 

We think this is fair. Thanks. 

We created a PR to fix this: https://github.com/boucadair/add-resolver-information/pull/19/files.

Cheers,
Tiru & Med

> -----Message d'origine-----
> De : Add <[e-mail]> De la part de Mark Andrews
> Envoyé : mercredi 21 février 2024 01:50
> À : Steffen Nurpmeso <[e-mail]>
> Cc : tirumal reddy <[e-mail]>; [e-mail]
> Objet : Re: [Add] draft-ietf-add-resolver-info-09
> 
> If a recursive server passes through a response with AA=1 it is
> broken. If a recursive  server forwards a query with RD=0 it is
> broken.  If a “recursive server” is just forwarding queries and
> responses the attacker will just put the response in the authority
> section.  The change of section provides no security. It doesn’t
> prevent problems. It is just change for changes sake.
> 
> --
> Mark Andrews
> 
> > On 21 Feb 2024, at 06:30, Steffen Nurpmeso <[e-mail]>
> wrote:
> >
> > tirumal reddy wrote in
> > <CAFpG3gd5GwSAoOs3SX2xWZyKVR7F5y-
> [e-mail]>:
> > |On Thu, 15 Feb 2024 at 06:02, Mark Andrews <[e-mail]> wrote:
> > |> Why is it necessary to change the standard processing of queries
> > |> for RESINFO when we already have a signal (AA=1) about whether
> the
> > |> answer is coming from elsewhere or not ?
> > |
> > |It is introduced to handle a scenario where SUDN is used to
> discover
> > |the encrypted resolver, and if the discovered resolver does not
> > |support RESINFO, it will forward the query upstream. An attacker
> > |might provide a RESINFO response with AA=1. The proposed mechanism
> > |aims to help the client identify whether the response is coming
> from
> > |the discovered encrypted resolver.
> >
> > By the way i am really not worth being noted for anything
> > acknowledgeable regarding the work of this WG.  At all.
> > If you have another iteration of the document, i would prefer if you
> > would simply scratch my name from your work.
> > It is solely your work, for sure.
> > And the above is possibly very smart: my DNS work was two decades
> ago,
> > and i could not even tell whether i have ever seen authority section
> > entries being passed through or not.
> >
> > My main topics are simplicity so small teams can still exist
> > competetively as was true over two decades ago (ie, with knowing the
> > entire picture, not by delegating to "trusted" external modules in
> > uncounted numbers), when there were <3000 RFCs.
> >
> > As such i very much appreciated RFC 8499, but i alone from my
> > superficial out-of-interest reading have 17 DNS-related RFCs added
> > locally since then, plus the draft of yours and whatever else from
> > this WG.
> >
> > And a different way to get the TLS trust (or, rather, use existing
> > ways of various kind eg rpki, ikev2, or simply public keys as is
> done
> > by DKIM (certificates are a bit larger, but with the TCP that is
> more
> > and more needed per se, or QUIC; or even the permanent HTTP proxying
> > of everything, that is "no problem")) away from CA pools, to DNS/TLS
> +
> > DNSSEC zone records.  Thank you for that, too!
> >
> > Ciao, and greetings from Germany,
> >
> > --steffen
> > |
> > |Der Kragenbaer,                The moon bear,
> > |der holt sich munter           he cheerfully and one by one
> > |einen nach dem anderen runter  wa.ks himself off (By Robert
> > |Gernhardt)
> 
> --
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