Writeup for <draft-ietf-6man-ipv6-atomic-fragments-02.txt>
Bob Hinden 7 December 2012
(1) What type of RFC is being requested (BCP, Proposed Standard, Internet
Standard, Informational, Experimental, or Historic)? Why is this the
proper type of RFC? Is this type of RFC indicated in the title page
Proposed Standard. The type is shown in the ID as:
Intended status: Standards Track
(2) The IESG approval announcement includes a Document Announcement
Write-Up. Please provide such a Document Announcement Write-Up. Recent
examples can be found in the "Action" announcements for approved
documents. The approval announcement contains the following sections:
The IPv6 specification allows packets to contain a Fragment Header
without the packet being actually fragmented into multiple pieces. Such
packets typically result from hosts that have received an ICMPv6 "Packet
Too Big" error message that advertises a "Next-Hop MTU" smaller than 1280
bytes, and are currently processed by some implementations as "fragmented
traffic". Thus, by forging ICMPv6 "Packet Too Big" error messages an
attacker can cause hosts to employ "atomic fragments", and then launch
any fragmentation-based attacks against such traffic. This document
discusses the generation of the aforementioned "atomic fragments", the
corresponding security implications, and formally updates RFC 2460 and
RFC 5722 such that fragmentation-based attack vectors against traffic
employing "atomic fragments" are completely eliminated.
Working Group Summary:
There is working support for this document. It has been discussed on the
mailing list and in face to face 6man sessions. The chairs did a review
that improved the quality of the document.
The document includes an appendix that lists implemenations that generate
atomic fragements and/or implement this document.
Who is the Document Shepherd? Who is the Responsible Area Director?
Bob Hinden, Document Shepherd
Brian Haberman, Internet AD
(3) Briefly describe the review of this document that was performed by
the Document Shepherd. If this version of the document is not ready for
publication, please explain why the document is being forwarded to the
I read the document and sent several comments and suggestions to the
author. I think the document is now clearer. A number of ID Nits were
(4) Does the document Shepherd have any concerns about the depth or
breadth of the reviews that have been performed?
(5) Do portions of the document need review from a particular or from
broader perspective, e.g., security, operational complexity, AAA, DNS,
DHCP, XML, or internationalization? If so, describe the review that took
(6) Describe any specific concerns or issues that the Document Shepherd
has with this document that the Responsible Area Director and/or the IESG
should be aware of? For example, perhaps he or she is uncomfortable with
certain parts of the document, or has concerns whether there really is a
need for it. In any event, if the WG has discussed those issues and has
indicated that it still wishes to advance the document, detail those
(7) Has each author confirmed that any and all appropriate IPR
disclosures required for full conformance with the provisions of BCP 78
and BCP 79 have already been filed. If not, explain why?
The author confirmed full conformance with BCP78 and BCP79.
(8) Has an IPR disclosure been filed that references this document? If
so, summarize any WG discussion and conclusion regarding the IPR
(9) How solid is the WG consensus behind this document? Does it represent
the strong concurrence of a few individuals, with others being silent, or
does the WG as a whole understand and agree with it?
I think there is a strong WG concensus to advance this document.
(10) Has anyone threatened an appeal or otherwise indicated extreme
discontent? If so, please summarise the areas of conflict in separate
email messages to the Responsible Area Director. (It should be in a
separate email because this questionnaire is publicly available.)
(11) Identify any ID nits the Document Shepherd has found in this
document. (See http://www.ietf.org/tools/idnits/ and the Internet-Drafts
Checklist). Boilerplate checks are not enough; this check needs to be
No ID nits.
(12) Describe how the document meets any required formal review criteria,
such as the MIB Doctor, media type, and URI type reviews.
(13) Have all references within this document been identified as either
normative or informative?
(14) Are there normative references to documents that are not ready for
advancement or are otherwise in an unclear state? If such normative
references exist, what is the plan for their completion?
(15) Are there downward normative references references (see RFC 3967)?
If so, list these downward references to support the Area Director in the
Last Call procedure.
(16) Will publication of this document change the status of any existing
RFCs? Are those RFCs listed on the title page header, listed in the
abstract, and discussed in the introduction? If the RFCs are not listed
in the Abstract and Introduction, explain why, and point to the part of
the document where the relationship of this document to the other RFCs is
discussed. If this information is not in the document, explain why the WG
considers it unnecessary.
This document updates two RFCs:
Updates: 2460, 5722 (if approved)
It does not change their status.
(17) Describe the Document Shepherd's review of the IANA considerations
section, especially with regard to its consistency with the body of the
document. Confirm that all protocol extensions that the document makes
are associated with the appropriate reservations in IANA
registries. Confirm that any referenced IANA registries have been clearly
identified. Confirm that newly created IANA registries include a detailed
specification of the initial contents for the registry, that allocations
procedures for future registrations are defined, and a reasonable name
for the new registry has been suggested (see RFC 5226).
There are no IANA actions.
(18) List any new IANA registries that require Expert Review for future
allocations. Provide any public guidance that the IESG would find useful
in selecting the IANA Experts for these new registries.
(19) Describe reviews and automated checks performed by the Document
Shepherd to validate sections of the document written in a formal
language, such as XML code, BNF rules, MIB definitions, etc.