A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Transport Layer Security Working Group of the IETF.
Title : Transport Layer Security (TLS) Session Hash and Extended Master Secret Extension
Authors : Karthikeyan Bhargavan
Antoine Delignat-Lavaud
Alfredo Pironti
Adam Langley
Marsh Ray
Filename : draft-ietf-tls-session-hash-03.txt
Pages : 11
Date : 2014-11-12
Abstract:
The Transport Layer Security (TLS) master secret is not
cryptographically bound to important session parameters.
Consequently, it is possible for an active attacker to set up two
sessions, one with a client and another with a server, such that the
master secrets on the two sessions are the same. Thereafter, any
mechanism that relies on the master secret for authentication,
including session resumption, becomes vulnerable to a man-in-the-
middle attack, where the attacker can simply forward messages back
and forth between the client and server. This specification defines
a TLS extension that contextually binds the master secret to a log of
the full handshake that computes it, thus preventing such attacks.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-tls-session-hash/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-tls-session-hash-03
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-tls-session-hash-03
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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