[dnsext] [Errata Verified] RFC6672 (5298)

RFC Errata System <rfc-editor@rfc-editor.org> Thu, 03 August 2023 13:40 UTC

To: pieter.lexis@powerdns.com, scott.rose@nist.gov, wouter@nlnetlabs.nl
From: RFC Errata System <rfc-editor@rfc-editor.org>
Cc: evyncke@cisco.com, iesg@ietf.org, dnsext@ietf.org, iana@iana.org
Content-Type: text/plain; charset="UTF-8"
Message-Id: <20230803134028.C109EE7299@rfcpa.amsl.com>
Date: Thu, 03 Aug 2023 06:40:28 -0700
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsext/RUNhXGngbz-e3iKPfXsMXa1ER6w>
Subject: [dnsext] [Errata Verified] RFC6672 (5298)
Precedence: list

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

--------------------------------------
You may review the report below and at:
https://www.rfc-editor.org/errata/eid5298

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

Reported by: Pieter Lexis <pieter.lexis@powerdns.com>
Date Reported: 2018-03-2
Verified by: Eric Vyncke (IESG)

Section: 5.3.4.2

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

   ;; Question
   cee.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
   cee.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

[dnsext] [Errata Verified] RFC6672 (5298) RFC Errata System