Analysis of OSPF Security According to KARP Design Guide
draft-ietf-karp-ospf-analysis-03

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Last updated 2012-03-12
Replaces draft-hartman-ospf-analysis
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KARP                                                          S. Hartman
Internet-Draft                                         Painless Security
Intended status: Informational                                  D. Zhang
Expires: September 13, 2012                  Huawei Technologies co. ltd
                                                          March 12, 2012

        Analysis of OSPF Security According to KARP Design Guide
                  draft-ietf-karp-ospf-analysis-03.txt

Abstract

   This document analyzes OSPFv2 and OSPFv3 according to the guidelines
   set forth in section 4.2 of draft-ietf-karp-design-guide.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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 September 13, 2012.

Copyright Notice

   Copyright (c) 2012 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

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   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
     1.1.  Requirements to Meet . . . . . . . . . . . . . . . . . . .  3
     1.2.  Requirements notation  . . . . . . . . . . . . . . . . . .  4
   2.  Current State  . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.1.  OSPFv2 . . . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.2.  OSPFv3 . . . . . . . . . . . . . . . . . . . . . . . . . .  6
   3.  Impacts of OSPF Replays  . . . . . . . . . . . . . . . . . . .  6
   4.  Gap Analysis and Specific Requirements . . . . . . . . . . . .  8
   5.  Solution Work  . . . . . . . . . . . . . . . . . . . . . . . .  8
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . .  9
   7.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     8.1.  Normative References . . . . . . . . . . . . . . . . . . . 10
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 10
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 11

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1.  Introduction

   This document performs the initial analysis of the current state of
   OSPFv2 and OSPFv3 according to the requirements of [RFC6518].  This
   draft builds on several previous analysis efforts into routing
   security.  The OPSEC working group put together [RFC6039] an analysis
   of cryptographic issues with routing protocols.  Earlier, the RPSEC
   working group put together [I-D.ietf-rpsec-ospf-vuln] a detailed
   analysis of OSPF vulnerabilities.

   OSPF meets many of the requirements expected from a manually keyed
   routing protocol.  Integrity protection is provided with modern
   cryptographic algorithms.  Algorithm agility is provided: the
   algorithm can be changed as part of re-keying an interface or peer.
   Intra-connection re-keying is provided by the specifications,
   although apparently some implementations have trouble with this in
   practice.  OSPFv2 security does not interfere with prioritization of
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