NEA Working Group IETF meeting July 27, Co-chairs: Steve Hanna Susan Jul 27, 2010IETF NEA Meeting1

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Agenda Review 1300 Administrivia Jabber & Minute scribes Agenda bashing 1305 WG Status 1310 NEA Reference Model 1315 Description of NEA Asokan attack 1345 Open Discussion 1435 Consensus Questions 1450 Next Steps 1455 Milestones 1500 Adjourn Jul 27, 2010IETF NEA Meeting3

WG Status – No change from last IETF Published as RFC: –PA-TNC: RFC 5792 (Mar 2010) –PB-TNC: RFC 5793 (Mar 2010) Individual PT proposals submitted (Jan 4) Virtual interim NEA WG meeting held (Jan 28) Jul 27, 2010IETF NEA Meeting4

NEA Reference Model Jul 27, 2010IETF NEA Meeting5

NEA Reference Model from RFC 5209 Posture Collectors Posture Validators Posture Transport Server Posture Attribute (PA) protocol Posture Broker (PB) protocol NEA ClientNEA Server Posture Transport (PT) protocols Posture Transport Client Posture Broker Client Posture Broker Server IETF NEA MeetingJul 27, 20106

PA-TNC Within PB-TNC Within PT PT PB-TNC Header PB-TNC Message (Type=PB-Batch-Type, Batch-Type=CDATA) PB-TNC Message (Type=PB-PA, PA Vendor ID=0, PA Subtype= OS) PA-TNC Message PA-TNC Attribute (Type=Product Info, Product ID=Windows XP) PA-TNC Attribute (Type=Numeric Version, Major=5, Minor=3,...) Jul 27, 20107IETF NEA Meeting

NEA Asokan Attack Jul 27, 2010IETF NEA Meeting8

Jul 27, 2010IETF NEA Meeting9 PT Trust Model NEA Server NEA Client Tunnel Establishment If the NEA client is configured to only talk to trusted/authorized NEA Servers, then MiTM attacks are mitigated If the NEA client is configured to allow it to talk to untrustworthy NEA Servers, then a MiTM can access and intercept the conversation.

Jul 27, 2010IETF NEA Meeting10 PA Trust Model NEA Server NEA Client PA conversation To address the lying endpoint problem, the trusted party at the endpoint can establish the authenticity of the Posture Attributes in a way that the Posture Validator can verify them.

SpyLaptop SpyUser Asokan Attack on NEA Jul 27, 2010IETF NEA Meeting11 Preconditions 1.NEA Assessment 2.CorpLaptop Infection 3.Lying Endpoint Detection (PA Trust Model) 4.SpyLaptop configured to allow communication with untrustworthy SpyServer (PT Trust Model) 5.PA Forwarding attack CorpLaptopCorpServer CorpUser ! SpyServer Any questions? ! ☺ ☺

Consensus Check Question NEA Asokan attack needs to be addressed? –Yes –No –Don’t know Jul 27, 2010IETF NEA Meeting12

Proposed Next Steps Address PT trust model in base PT protocol I-Ds Address PA trust model in PT extension I-D –PT-independent Jul 27, 2010IETF NEA Meeting13

Milestones Aug 2010Set up design team to work on PT extension I-D Oct 2010Output of Design team due Nov 2010Review and Resolve issues with PT I-Ds at IETF 79 Dec 2010Publish -00 NEA WG PT I-Ds Jan 2011Resolve issues with -00 NEA WG PT I-Ds Feb 2011Publish -01 NEA WG PT I-Ds Mar 2011Resolve issues with -01 NEA WG PT I-Ds at IETF 80 Apr 2011WGLC on -01 NEA WG I-Ds May 2012Publish -02 NEA WG I-Ds Jun 2012IETF LC Jul 27, 2010IETF NEA Meeting14

Adjourn Jul 27, IETF NEA Meeting