PT-EAP: Posture Transport (PT) Protocol for Extensible Authentication Protocol (EAP) Tunnel Methods
RFC 7171
Document | Type |
RFC - Proposed Standard
(May 2014; No errata)
Was draft-ietf-nea-pt-eap (nea WG)
|
|
---|---|---|---|
Authors | Nancy Cam-Winget , Paul Sangster | ||
Last updated | 2015-10-14 | ||
Replaces | draft-hanna-nea-pt-eap | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 7171 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Stephen Farrell | ||
IESG note | Susan Thomson (sethomso@cisco.com) is the Document Shepherd | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) N. Cam-Winget Request for Comments: 7171 Cisco Systems Category: Standards Track P. Sangster ISSN: 2070-1721 Symantec Corporation May 2014 PT-EAP: Posture Transport (PT) Protocol for Extensible Authentication Protocol (EAP) Tunnel Methods Abstract This document specifies PT-EAP, a Posture Transport (PT) protocol based on the Extensible Authentication Protocol (EAP) and designed to be used only inside an EAP tunnel method protected by Transport Layer Security (TLS). The document also describes the intended applicability of PT-EAP. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7171. Copyright Notice Copyright (c) 2014 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Cam-Winget & Sangster Standards Track [Page 1] RFC 7171 NEA PT-EAP May 2014 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Prerequisites . . . . . . . . . . . . . . . . . . . . . . 3 1.2. Message Diagram Conventions . . . . . . . . . . . . . . . 3 1.3. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 1.4. Conventions Used in This Document . . . . . . . . . . . . 4 1.5. Compatibility with Other Specifications . . . . . . . . . 4 2. Use of PT-EAP . . . . . . . . . . . . . . . . . . . . . . . . 4 3. Definition of PT-EAP . . . . . . . . . . . . . . . . . . . . 4 3.1. Protocol Overview . . . . . . . . . . . . . . . . . . . . 5 3.2. Version Negotiation . . . . . . . . . . . . . . . . . . . 6 3.3. PT-EAP Message Format . . . . . . . . . . . . . . . . . . 6 3.4. Preventing MITM Attacks with Channel Bindings . . . . . . 8 4. Security Considerations . . . . . . . . . . . . . . . . . . . 9 4.1. Trust Relationships . . . . . . . . . . . . . . . . . . . 9 4.1.1. Posture Transport Client . . . . . . . . . . . . . . 9 4.1.2. Posture Transport Server . . . . . . . . . . . . . . 10 4.2. Threats and Countermeasures . . . . . . . . . . . . . . . 10 4.2.1. Message Confidentiality . . . . . . . . . . . . . . . 11 4.2.2. Message Fabrication . . . . . . . . . . . . . . . . . 11 4.2.3. Message Modification . . . . . . . . . . . . . . . . 12 4.2.4. Denial of Service . . . . . . . . . . . . . . . . . . 12 4.2.5. NEA Asokan Attacks . . . . . . . . . . . . . . . . . 13 4.3. Candidate EAP Tunnel Method Protections . . . . . . . . . 13 4.4. Security Claims for PT-EAP as per RFC 3748 . . . . . . . 14 5. Requirements for EAP Tunnel Methods . . . . . . . . . . . . . 14 6. Privacy Considerations . . . . . . . . . . . . . . . . . . . 16 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16 7.1. Registry for PT-EAP Versions . . . . . . . . . . . . . . 17 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 17 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 18 9.1. Normative References . . . . . . . . . . . . . . . . . . 18 9.2. Informative References . . . . . . . . . . . . . . . . . 18 1. Introduction This document specifies PT-EAP, a Posture Transport (PT) protocol protected by a TLS-protected EAP tunnel method. The PT protocol in the Network Endpoint Assessment (NEA) architecture is responsible for transporting Posture Broker (PB-TNC [RFC5793]) batches, often containing Posture Attributes (PA-TNC [RFC5792]), across the network between the NEA Client and NEA Server. The PT-EAP protocol must beShow full document text