[DNSOP] SHA-1 DS algo in arpa. :)

Paul Wouters <paul@nohats.ca> Thu, 09 September 2021 15:28 UTC

Return-Path: <paul@nohats.ca>
X-Original-To: dnsop@ietfa.amsl.com
Delivered-To: dnsop@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ECDFB3A180A for <dnsop@ietfa.amsl.com>; Thu, 9 Sep 2021 08:28:16 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.097
X-Spam-Level:
X-Spam-Status: No, score=-2.097 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=nohats.ca
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 JJZmMZh7l0GB for <dnsop@ietfa.amsl.com>; Thu, 9 Sep 2021 08:28:11 -0700 (PDT)
Received: from mx.nohats.ca (mx.nohats.ca [193.110.157.68]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 495373A17FF for <dnsop@ietf.org>; Thu, 9 Sep 2021 08:28:11 -0700 (PDT)
Received: from localhost (localhost [IPv6:::1]) by mx.nohats.ca (Postfix) with ESMTP id 4H52vW51YPz3Z2 for <dnsop@ietf.org>; Thu, 9 Sep 2021 17:28:07 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nohats.ca; s=default; t=1631201287; bh=ZdDy+4err7BwRvt1isg3eqjeUIWQZzvXdx3+hvdbecw=; h=Date:From:To:Subject; b=Iyxo/QRi6GHuKQNAJhpWrOTYURajkwULUBqJg87Q+pX1yQ2Gjb0uf1NvkgeuGtTIQ bwLZPodqZ9/EOy78JWTcPobZUIwpyG+FBVN5KYUDwuux8Q8iVn5bX/eQHkjF1j6DYf TuaGJmX1Jm6Zw04UaAa0ntzCwQeHQWpBfGhStPDY=
X-Virus-Scanned: amavisd-new at mx.nohats.ca
Received: from mx.nohats.ca ([IPv6:::1]) by localhost (mx.nohats.ca [IPv6:::1]) (amavisd-new, port 10024) with ESMTP id Q3VDetT3f3nl for <dnsop@ietf.org>; Thu, 9 Sep 2021 17:28:05 +0200 (CEST)
Received: from bofh.nohats.ca (bofh.nohats.ca [193.110.157.194]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx.nohats.ca (Postfix) with ESMTPS for <dnsop@ietf.org>; Thu, 9 Sep 2021 17:28:05 +0200 (CEST)
Received: by bofh.nohats.ca (Postfix, from userid 1000) id 88820F74E7; Thu, 9 Sep 2021 11:28:04 -0400 (EDT)
Received: from localhost (localhost [127.0.0.1]) by bofh.nohats.ca (Postfix) with ESMTP id 85CCEF74E6 for <dnsop@ietf.org>; Thu, 9 Sep 2021 11:28:04 -0400 (EDT)
Date: Thu, 09 Sep 2021 11:28:04 -0400
From: Paul Wouters <paul@nohats.ca>
To: dnsop <dnsop@ietf.org>
Message-ID: <262ce7f3-fb31-172d-e920-629da9c1e681@nohats.ca>
MIME-Version: 1.0
Content-Type: text/plain; format="flowed"; charset="US-ASCII"
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/Ez3RJ70EpYls3ciGd6dcvMZ6tBg>
Subject: [DNSOP] SHA-1 DS algo in arpa. :)
X-BeenThere: dnsop@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: IETF DNSOP WG mailing list <dnsop.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dnsop>, <mailto:dnsop-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dnsop/>
List-Post: <mailto:dnsop@ietf.org>
List-Help: <mailto:dnsop-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dnsop>, <mailto:dnsop-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 09 Sep 2021 15:28:17 -0000

Looks like for arpa., the DS records are:

arpa.			27247	IN	DS	42581 8 1 778606D9623F843F156E7D11ACBF815EB67AB516
arpa.			27247	IN	DS	42581 8 2 F28391C1ED4DC0F151EDD251A3103DCE0B9A5A251ACF6E24073771D7 1F3C40F9


Per our own recommendations, we should probanly ask for the SHA-1 record to be removed :)

This is hinted strongly at in 2006:

 	https://datatracker.ietf.org/doc/html/rfc4509#section-6.2

and even stronger via a MUST NOT in 2019's RFC 8624:

 	https://datatracker.ietf.org/doc/html/rfc8624#section-3.3

What's the process for requesting the SHA-1 based DS record deletation for .arpa?

Paul