SAVI Threat Scope
draft-ietf-savi-threat-scope-07

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Document Type Active Internet-Draft (savi WG)
Last updated 2013-04-03
Replaces draft-mcpherson-savi-threat-scope
Stream IETF
Intended RFC status Informational
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Responsible AD Ted Lemon
IESG note Jean-Michel Combes (jeanmichel.combes@gmail.com) is the Document Shepherd.
Send notices to savi-chairs@tools.ietf.org, draft-ietf-savi-threat-scope@tools.ietf.org
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SAVI                                                        D. McPherson
Internet-Draft                                            VeriSign, Inc.
Intended status: Informational                                F.J. Baker
Expires: October 05, 2013                                  Cisco Systems
                                                            J.M. Halpern
                                                                Ericsson
                                                          April 03, 2013

                           SAVI Threat Scope
                    draft-ietf-savi-threat-scope-07

Abstract

   Source Address Validation Improvement (SAVI) effort aims to
   complement ingress filtering with finer-grained, standardized IP
   source address validation.  This document describes threats enabled
   by IP source address spoofing both in the global and finer-grained
   context, describes currently available solutions and challenges, and
   provides a starting point analysis for finer-grained (host
   granularity) anti-spoofing work.

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

   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."

   This Internet-Draft will expire on October 05, 2013.

Copyright Notice

   Copyright (c) 2013 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

McPherson, et al.       Expires October 05, 2013                [Page 1]
Internet-Draft                                                April 2013

   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.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Glossary of Terms . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Spoofed-based Attack Vectors  . . . . . . . . . . . . . . . .   5
     3.1.  Blind Attacks . . . . . . . . . . . . . . . . . . . . . .   6
       3.1.1.  Single Packet Attacks . . . . . . . . . . . . . . . .   6
       3.1.2.  Flood-Based DoS . . . . . . . . . . . . . . . . . . .   6
       3.1.3.  Poisoning Attacks . . . . . . . . . . . . . . . . . .   7
       3.1.4.  Spoof-based Worm/Malware Propagation  . . . . . . . .   8
       3.1.5.  Reflective Attacks  . . . . . . . . . . . . . . . . .   8
       3.1.6.  Accounting Subversion . . . . . . . . . . . . . . . .   8
       3.1.7.  Other Blind Spoofing Attacks  . . . . . . . . . . . .   9
     3.2.  Non-Blind Attacks . . . . . . . . . . . . . . . . . . . .   9
       3.2.1.  Man in the Middle (MITM)  . . . . . . . . . . . . . .   9
       3.2.2.  Third Party Recon . . . . . . . . . . . . . . . . . .  10
       3.2.3.  Other Non-Blind Spoofing Attacks  . . . . . . . . . .  10
   4.  Current Anti-Spoofing Solutions . . . . . . . . . . . . . . .  10
     4.1.  Topological Locations for Enforcement . . . . . . . . . .  12
       4.1.1.  Host to link layer neighbor via switch  . . . . . . .  12
       4.1.2.  Upstream Switches . . . . . . . . . . . . . . . . . .  12
       4.1.3.  Upstream Routers  . . . . . . . . . . . . . . . . . .  13
       4.1.4.  ISP Edge PE Router  . . . . . . . . . . . . . . . . .  13
       4.1.5.  ISP NNI Router to ISP NNI Router  . . . . . . . . . .  13
       4.1.6.  Cable Modem Subscriber Access . . . . . . . . . . . .  14
       4.1.7.  DSL Subscriber Access . . . . . . . . . . . . . . . .  14
     4.2.  Currently Available Tools . . . . . . . . . . . . . . . .  15
       4.2.1.  BCP 38  . . . . . . . . . . . . . . . . . . . . . . .  15
       4.2.2.  Unicast RPF . . . . . . . . . . . . . . . . . . . . .  15
       4.2.3.  Port-based Address Binding  . . . . . . . . . . . . .  15
       4.2.4.  Cryptographic Techniques  . . . . . . . . . . . . . .  16
       4.2.5.  Residual Attacks  . . . . . . . . . . . . . . . . . .  17
   5.  Topological Challenges Facing SAVI  . . . . . . . . . . . . .  17
     5.1.  Address Provisioning Mechanisms . . . . . . . . . . . . .  17
     5.2.  LAN devices with Multiple Addresses . . . . . . . . . . .  17
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