Manufacturer Usage Description (MUD) (D)TLS Profiles for IoT Devices
draft-ietf-opsawg-mud-tls-02

Document Type Active Internet-Draft (opsawg WG)
Authors Tirumaleswar Reddy.K  , Dan Wing  , Blake Anderson 
Last updated 2020-10-21
Replaces draft-reddy-opsawg-mud-tls
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- Yang catalog entry for iana-tls-profile@2020-10-07.yang
- Yang catalog entry for ietf-acl-tls@2020-10-07.yang
- Yang catalog entry for ietf-mud-tls@2020-10-19.yang
- Yang impact analysis for draft-ietf-opsawg-mud-tls
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OPSAWG WG                                                       T. Reddy
Internet-Draft                                                    McAfee
Intended status: Standards Track                                 D. Wing
Expires: April 24, 2021                                           Citrix
                                                             B. Anderson
                                                                   Cisco
                                                        October 21, 2020

  Manufacturer Usage Description (MUD) (D)TLS Profiles for IoT Devices
                      draft-ietf-opsawg-mud-tls-02

Abstract

   This memo extends the Manufacturer Usage Description (MUD)
   specification to incorporate (D)TLS profile parameters.  This allows
   a network security service to identify unexpected (D)TLS usage, which
   can indicate the presence of unauthorized software or malware on an
   endpoint.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on April 24, 2021.

Copyright Notice

   Copyright (c) 2020 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
   (https://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

Reddy, et al.            Expires April 24, 2021                 [Page 1]
Internet-Draft     MUD (D)TLS Profile for IoT devices       October 2020

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Overview of MUD (D)TLS profiles for IoT devices . . . . . . .   5
   4.  (D)TLS 1.3 Handshake  . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Full (D)TLS 1.3 Handshake Inspection  . . . . . . . . . .   6
     4.2.  Encrypted DNS . . . . . . . . . . . . . . . . . . . . . .   7
   5.  (D)TLS Profile of a IoT device  . . . . . . . . . . . . . . .   7
     5.1.  Tree Structure of the (D)TLS profile Extension to the ACL
           YANG Model  . . . . . . . . . . . . . . . . . . . . . . .   9
     5.2.  The (D)TLS profile Extension to the ACL YANG Model  . . .  10
     5.3.  IANA (D)TLS profile YANG Module . . . . . . . . . . . . .  15
     5.4.  MUD (D)TLS Profile Extension  . . . . . . . . . . . . . .  18
   6.  Processing of the MUD (D)TLS Profile  . . . . . . . . . . . .  20
   7.  MUD File Example  . . . . . . . . . . . . . . . . . . . . . .  20
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  22
   9.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  23
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  23
     10.1.  (D)TLS Profile YANG Modules  . . . . . . . . . . . . . .  23
     10.2.  TLS Version registry . . . . . . . . . . . . . . . . . .  25
     10.3.  DTLS version registry  . . . . . . . . . . . . . . . . .  26
     10.4.  (D)TLS Parameters registry . . . . . . . . . . . . . . .  26
     10.5.  MUD Extensions registry  . . . . . . . . . . . . . . . .  27
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  27
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  28
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  28
     12.2.  Informative References . . . . . . . . . . . . . . . . .  29
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  31

1.  Introduction

   Encryption is necessary to enhance the privacy of end users using IoT
   devices.  TLS [RFC8446] and DTLS [I-D.ietf-tls-dtls13] are the
   dominant protocols (counting all (D)TLS versions) providing
   encryption for IoT device traffic.  Unfortunately, in conjunction
   with IoT applications' rise of encryption, malware authors are also
   using encryption which thwarts network-based analysis such as deep
   packet inspection (DPI).  Other mechanisms are thus needed to help
   detecting malware running on an IoT device.
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