[dnsext] [Errata Verified] RFC6672 (5297)

RFC Errata System <rfc-editor@rfc-editor.org> Mon, 26 March 2018 15:32 UTC

Return-Path: <wwwrun@rfc-editor.org>
X-Original-To: dnsext@ietfa.amsl.com
Delivered-To: dnsext@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 76B4E129C51; Mon, 26 Mar 2018 08:32:39 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.211
X-Spam-Level:
X-Spam-Status: No, score=-4.211 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham autolearn_force=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 XaRFOtBNz2NH; Mon, 26 Mar 2018 08:32:37 -0700 (PDT)
Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D64FF1277BB; Mon, 26 Mar 2018 08:32:37 -0700 (PDT)
Received: by rfc-editor.org (Postfix, from userid 30) id 43BDCB81077; Mon, 26 Mar 2018 08:32:21 -0700 (PDT)
To: pieter.lexis@powerdns.com, scott.rose@nist.gov, wouter@nlnetlabs.nl
X-PHP-Originating-Script: 30:errata_mail_lib.php
From: RFC Errata System <rfc-editor@rfc-editor.org>
Cc: warren@kumari.net, iesg@ietf.org, dnsext@ietf.org, rfc-editor@rfc-editor.org
Content-Type: text/plain; charset=UTF-8
Message-Id: <20180326153221.43BDCB81077@rfc-editor.org>
Date: Mon, 26 Mar 2018 08:32:21 -0700 (PDT)
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsext/B4gucOV33flAp9AEFbY6oEqRLpI>
Subject: [dnsext] [Errata Verified] RFC6672 (5297)
X-BeenThere: dnsext@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: DNS Extensions working group discussion list <dnsext.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dnsext>, <mailto:dnsext-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dnsext/>
List-Post: <mailto:dnsext@ietf.org>
List-Help: <mailto:dnsext-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dnsext>, <mailto:dnsext-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 26 Mar 2018 15:32:39 -0000

The following errata report has been verified for RFC6672,
"DNAME Redirection in the DNS". 

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata/eid5297

--------------------------------------
Status: Verified
Type: Editorial

Reported by: Pieter Lexis <pieter.lexis@powerdns.com>
Date Reported: 2018-03-23
Verified by: Warren Kumari (Ops AD) (IESG)

Section: 5.3.4.1

Original Text
-------------
   ;; Header: QR AA RCODE=3(NXDOMAIN)
   ;; OPT PSEUDOSECTION:
   ; EDNS: version: 0, flags: do; udp: 4096

   ;; Question
   foo.bar.example.com. IN A
   ;; Authority
   bar.example.com. NSEC dub.example.com. A DNAME 
   bar.example.com. RRSIG NSEC [valid signature]

Corrected Text
--------------
   ;; Header: QR AA RCODE=3(NXDOMAIN)
   ;; OPT PSEUDOSECTION:
   ; EDNS: version: 0, flags: do; udp: 4096

   ;; Question
   foo.bar.example.com. IN A
   ;; Authority
   bar.example.com. NSEC dub.example.com. A DNAME RRSIG NSEC
   bar.example.com. RRSIG NSEC [valid signature]

Notes
-----
The NSEC record in the original text would in no case be valid as it denies it's own existence and the existence of the RRSIG, while the text indicates that " the validator can see that it is a  BOGUS reply from an attacker that collated existing records from the DNS to create a confusing reply". This indicates that NSEC and RRSIG should be set in the NSEC bitmap.

Edit: Thread: https://www.ietf.org/mail-archive/web/dnsext/current/msg13879.html

--------------------------------------
RFC6672 (draft-ietf-dnsext-rfc2672bis-dname-26)
--------------------------------------
Title               : DNAME Redirection in the DNS
Publication Date    : June 2012
Author(s)           : S. Rose, W. Wijngaards
Category            : PROPOSED STANDARD
Source              : DNS Extensions
Area                : Internet
Stream              : IETF
Verifying Party     : IESG