A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IPv6 Maintenance Working Group of the IETF.
Title : Security Implications of Predictable Fragment Identification Values
Author : Fernando Gont
Filename : draft-ietf-6man-predictable-fragment-id-03.txt
Pages : 16
Date : 2015-03-09
Abstract:
IPv6 specifies the Fragment Header, which is employed for the
fragmentation and reassembly mechanisms. The Fragment Header
contains an "Identification" field which, together with the IPv6
Source Address and the IPv6 Destination Address of a packet,
identifies fragments that correspond to the same original datagram,
such that they can be reassembled together at the receiving host.
The only requirement for setting the "Identification" value is that
it must be different than that employed for any other fragmented
packet sent recently with the same Source Address and Destination
Address. Some implementations use a simple global counter for
setting the Identification field, thus leading to predictable values.
This document analyzes the security implications of predictable
Identification values, and provides implementation guidance for
selecting the Identification field of the Fragment Header, such that
the aforementioned security implications are mitigated.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-6man-predictable-fragment-id/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-6man-predictable-fragment-id-03
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-6man-predictable-fragment-id-03
Please note that it may take a couple of minutes from the time of submission
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