Deterministic Networking (DetNet) Security Considerations
draft-ietf-detnet-security-07

Document Type Active Internet-Draft (detnet WG)
Last updated 2020-01-10
Replaces draft-sdt-detnet-security
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Internet Engineering Task Force                               T. Mizrahi
Internet-Draft                                                    HUAWEI
Intended status: Informational                          E. Grossman, Ed.
Expires: July 13, 2020                                             DOLBY
                                                               A. Hacker
                                                                  MISTIQ
                                                                  S. Das
                                          Applied Communication Sciences
                                                              J. Dowdell
                                                Airbus Defence and Space
                                                               H. Austad
                                                          SINTEF Digital
                                                                 N. Finn
                                                                  HUAWEI
                                                        January 10, 2020

       Deterministic Networking (DetNet) Security Considerations
                     draft-ietf-detnet-security-07

Abstract

   A deterministic network is one that can carry data flows for real-
   time applications with extremely low data loss rates and bounded
   latency.  Deterministic networks have been successfully deployed in
   real-time operational technology (OT) applications for some years.
   However, such networks are typically isolated from external access,
   and thus the security threat from external attackers is low.  IETF
   Deterministic Networking (DetNet) specifies a set of technologies
   that enable creation of deterministic networks on IP-based networks
   of potentially wide area (on the scale of a corporate network)
   potentially bringing the OT network into contact with Information
   Technology (IT) traffic and security threats that lie outside of a
   tightly controlled and bounded area (such as the internals of an
   aircraft).  These DetNet technologies have not previously been
   deployed together on a wide area IP-based network, and thus can
   present security considerations that may be new to IP-based wide area
   network designers.  This document, intended for use by DetNet network
   designers, provides insight into these security considerations.

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
   Task Force (IETF).  Note that other groups may also distribute

Mizrahi, et al.           Expires July 13, 2020                 [Page 1]
Internet-Draft               DetNet Security                January 2020

   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on July 13, 2020.

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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Abbreviations . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Security Threats  . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Threat Model  . . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  Threat Analysis . . . . . . . . . . . . . . . . . . . . .   7
       3.2.1.  Delay . . . . . . . . . . . . . . . . . . . . . . . .   7
         3.2.1.1.  Delay Attack  . . . . . . . . . . . . . . . . . .   7
       3.2.2.  DetNet Flow Modification or Spoofing  . . . . . . . .   7
       3.2.3.  Resource Segmentation or Slicing  . . . . . . . . . .   7
         3.2.3.1.  Inter-segment Attack  . . . . . . . . . . . . . .   7
       3.2.4.  Packet Replication and Elimination  . . . . . . . . .   8
         3.2.4.1.  Replication: Increased Attack Surface . . . . . .   8
         3.2.4.2.  Replication-related Header Manipulation . . . . .   8
       3.2.5.  Path Choice . . . . . . . . . . . . . . . . . . . . .   8
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