Re: [secdir] Secdir review of draft-ietf-roll-trickle-mcast-05
Michael Richardson <mcr+ietf@sandelman.ca> Wed, 27 November 2013 00:57 UTC
Return-Path: <mcr@sandelman.ca>
X-Original-To: secdir@ietfa.amsl.com
Delivered-To: secdir@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 05C481AE0A6; Tue, 26 Nov 2013 16:57:24 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.892
X-Spam-Level:
X-Spam-Status: No, score=-1.892 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, T_TVD_MIME_NO_HEADERS=0.01] autolearn=ham
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 iYlWmlueQo1M; Tue, 26 Nov 2013 16:57:21 -0800 (PST)
Received: from tuna.sandelman.ca (tuna.sandelman.ca [IPv6:2607:f0b0:f:3::184]) by ietfa.amsl.com (Postfix) with ESMTP id BF95D1AE00A; Tue, 26 Nov 2013 16:57:21 -0800 (PST)
Received: from sandelman.ca (obiwan.sandelman.ca [IPv6:2607:f0b0:f:2::247]) by tuna.sandelman.ca (Postfix) with ESMTP id 0976C20316; Tue, 26 Nov 2013 21:10:13 -0500 (EST)
Received: by sandelman.ca (Postfix, from userid 179) id AB94363B88; Tue, 26 Nov 2013 19:57:13 -0500 (EST)
Received: from sandelman.ca (localhost [127.0.0.1]) by sandelman.ca (Postfix) with ESMTP id 9DF5E63B87; Tue, 26 Nov 2013 19:57:13 -0500 (EST)
From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Tero Kivinen <kivinen@iki.fi>
In-Reply-To: <21133.64571.158642.421795@fireball.kivinen.iki.fi>
References: <21133.64571.158642.421795@fireball.kivinen.iki.fi>
X-Mailer: MH-E 8.2; nmh 1.3-dev; GNU Emacs 23.4.1
X-Face: $\n1pF)h^`}$H>Hk{L"x@)JS7<%Az}5RyS@k9X%29-lHB$Ti.V>2bi.~ehC0; <'$9xN5Ub# z!G,p`nR&p7Fz@^UXIn156S8.~^@MJ*mMsD7=QFeq%AL4m<nPbLgmtKK-5dC@#:k
MIME-Version: 1.0
Content-Type: multipart/signed; boundary="=-=-="; micalg="pgp-sha1"; protocol="application/pgp-signature"
Date: Tue, 26 Nov 2013 19:57:13 -0500
Message-ID: <23760.1385513833@sandelman.ca>
Sender: mcr@sandelman.ca
Cc: iesg@ietf.org, draft-ietf-roll-trickle-mcast.all@tools.ietf.org, secdir@ietf.org
Subject: Re: [secdir] Secdir review of draft-ietf-roll-trickle-mcast-05
X-BeenThere: secdir@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Security Area Directorate <secdir.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/secdir>, <mailto:secdir-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/secdir/>
List-Post: <mailto:secdir@ietf.org>
List-Help: <mailto:secdir-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/secdir>, <mailto:secdir-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 27 Nov 2013 00:57:24 -0000
Tero Kivinen <kivinen@iki.fi> wrote: > I have reviewed this document as part of the security directorate's > ongoing effort to review all IETF documents being processed by the Thank you. Tero Kivinen <kivinen@iki.fi> wrote: > This document describes the Multicast protocol for Low and Lossy > Networks. This protocol uses trickle algorithm. I am not familiar > enough to trickle to really analyze what the protocol does. Security > considerations section mentions that the protocol uses sequence > numbers to keep track of messages, and attacker who can insert > messages can mess up with those sequence numbers, and attacker can > then flush messages from the buffered messages list, and can also > allow setting it high enough so recipients will not get any messages > as they have too small sequence number. All correct observations. > The protocol has no protection against this attack, but notes that > both of those are denial-of-service attacks and devices can protect > against them by using link-layer security mechanisms. It also claims > that those mechanisms are typically employed without specifying which > security methods it is pointing to. I do not know how often those > link-layer security methods are really used. Perhaps it would be > useful to list some of those security methods here. At this pointin LLNs, use of layer-2 security *ONLY* is pretty much 100%. It's "WEP" == Wired Equivalent Privacy. No layer-3, no other authorization distinction between devices, etc. (Zigbee IP sometimes uses per-link keying as well, so it also defends against nodes inside the tent going corrupt) -- ] Never tell me the odds! | ipv6 mesh networks [ ] Michael Richardson, Sandelman Software Works | network architect [ ] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on rails [ -- Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works IETF ROLL WG co-chair. http://datatracker.ietf.org/wg/roll/charter/
- [secdir] Secdir review of draft-ietf-roll-trickle… Tero Kivinen
- Re: [secdir] Secdir review of draft-ietf-roll-tri… Michael Richardson
- Re: [secdir] Secdir review of draft-ietf-roll-tri… Donald Eastlake
- Re: [secdir] Secdir review of draft-ietf-roll-tri… Michael Richardson