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Title : The Compound Authentication Binding Problem
Author(s) : J. Puthenkulam
Filename : draft-puthenkulam-eap-binding-04.txt
Pages : 37
Date : 2003-10-27
There are several motivations for using compound authentication methods
using tunnels, but man-in-the-middle attacks have been found in these
protocols under certain circumstances. They occur when the inner
methods used inside a tunnel method are also used outside it, without
cryptographically binding the methods together. At the time of writing
this document, several protocols being proposed within the IETF were
vulnerable to these attacks, including IKE with XAUTH, PIC, PANA over
TLS, EAP TTLS and PEAP. This document studies the problems and suggests
potential solutions to mitigate them. We also provide a reference
solution for an EAP tunneling protocol like PEAP.
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