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Security Requirements of Time Protocols in Packet Switched Networks
draft-ietf-tictoc-security-requirements-12

Document type: Active Internet-Draft (tictoc WG)
Document stream: IETF
Last updated: 2014-09-03
Intended RFC status: Informational
Other versions: plain text, pdf, html

IETF State: Submitted to IESG for Publication
Consensus: Yes
Document shepherd: Karen O'Donoghue
Shepherd Write-Up: Last changed 2014-07-24

IESG State: RFC Ed Queue
IANA Action State: No IC
RFC Editor State: RFC-EDITOR
Responsible AD: Brian Haberman
Send notices to: tictoc-chairs@tools.ietf.org, draft-ietf-tictoc-security-requirements@tools.ietf.org

TICTOC Working Group                                          T. Mizrahi
Internet Draft                                                   Marvell
Intended status: Informational
Expires: March 2015                                    September 3, 2014

                  Security Requirements of Time Protocols
                        in Packet Switched Networks
              draft-ietf-tictoc-security-requirements-12.txt

Abstract

   As time and frequency distribution protocols are becoming
   increasingly common and widely deployed, concern about their exposure
   to various security threats is increasing. This document defines a
   set of security requirements for time protocols, focusing on the
   Precision Time Protocol (PTP) and the Network Time Protocol (NTP).
   This document also discusses the security impacts of time protocol
   practices, the performance implications of external security
   practices on time protocols and the dependencies between other
   security services and time synchronization.

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt.

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.

   This Internet-Draft will expire on March 3, 2015.

Tal Mizrahi             Expires March 3, 2015                 [Page 1]
Internet-Draft   Time Protocol Security Requirements     September 2014

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.

Table of Contents

   1. Introduction ................................................. 3
   2. Conventions Used in this Document ............................ 5
      2.1. Terminology ............................................. 5
      2.2. Abbreviations ........................................... 5
      2.3. Common Terminology for PTP and NTP ...................... 6
      2.4. Terms used in this Document ............................. 6
   3. Security Threats ............................................. 7
      3.1. Threat Model ............................................ 7
         3.1.1. Internal vs. External Attackers .................... 7
         3.1.2. Man in the Middle (MITM) vs. Packet Injector ....... 8
      3.2. Threat Analysis.......................................... 8
         3.2.1. Packet Manipulation ................................ 8
         3.2.2. Spoofing ........................................... 9
         3.2.3. Replay Attack ...................................... 9
         3.2.4. Rogue Master Attack ................................ 9
         3.2.5. Packet Interception and Removal ................... 10
         3.2.6. Packet Delay Manipulation ......................... 10
         3.2.7. L2/L3 DoS Attacks ................................. 10
         3.2.8. Cryptographic Performance Attacks ................. 10
         3.2.9. DoS Attacks against the Time Protocol ............. 10
         3.2.10. Grandmaster Time Source Attack (e.g., GPS fraud) . 11
         3.2.11. Exploiting Vulnerabilities in the Time Protocol .. 11
         3.2.12. Network Reconnaissance ........................... 11
      3.3. Threat Analysis Summary ................................ 11
   4. Requirement Levels .......................................... 13
   5. Security Requirements ....................................... 14
      5.1. Clock Identity Authentication and Authorization ........ 14
         5.1.1. Authentication and Authorization of Masters ....... 15
         5.1.2. Recursive Authentication and Authorization of Masters
         (Chain of Trust) ......................................... 16

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