Session Traversal Utilities for NAT (STUN) Usage for Consent Freshness
RFC 7675
Document | Type | RFC - Proposed Standard (October 2015; No errata) | |
---|---|---|---|
Authors | Muthu Perumal , Dan Wing , Ram R , Tirumaleswar Reddy.K , Martin Thomson | ||
Last updated | 2018-12-20 | ||
Replaces | draft-thomson-rtcweb-consent, draft-muthu-behave-consent-freshness | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Ted Hardie | ||
Shepherd write-up | Show (last changed 2015-07-02) | ||
IESG | IESG state | RFC 7675 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Alissa Cooper | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) M. Perumal Request for Comments: 7675 Ericsson Category: Standards Track D. Wing ISSN: 2070-1721 Cisco Systems, Inc. R. Ravindranath T. Reddy Cisco Systems M. Thomson Mozilla October 2015 Session Traversal Utilities for NAT (STUN) Usage for Consent Freshness Abstract To prevent WebRTC applications, such as browsers, from launching attacks by sending traffic to unwilling victims, periodic consent to send needs to be obtained from remote endpoints. This document describes a consent mechanism using a new Session Traversal Utilities for NAT (STUN) usage. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7675. Perumal, et al. Standards Track [Page 1] RFC 7675 STUN Usage for Consent Freshness October 2015 Copyright Notice Copyright (c) 2015 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 . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Applicability . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. Design Considerations . . . . . . . . . . . . . . . . . . . . 4 5. Solution . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5.1. Expiration of Consent . . . . . . . . . . . . . . . . . . 5 5.2. Immediate Revocation of Consent . . . . . . . . . . . . . 6 6. DiffServ Treatment for Consent . . . . . . . . . . . . . . . 7 7. DTLS Applicability . . . . . . . . . . . . . . . . . . . . . 7 8. Security Considerations . . . . . . . . . . . . . . . . . . . 7 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 8 9.1. Normative References . . . . . . . . . . . . . . . . . . 8 9.2. Informative References . . . . . . . . . . . . . . . . . 8 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 9 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10 1. Introduction To prevent attacks on peers, endpoints have to ensure the remote peer is willing to receive traffic. Verification of peer consent before sending traffic is necessary in deployments like WebRTC to ensure that a malicious JavaScript cannot use the browser as a platform for launching attacks. This is performed both when the session is first established to the remote peer using Interactive Connectivity Establishment (ICE) [RFC5245] connectivity checks, and periodically for the duration of the session using the procedures defined in this document. When a session is first established, ICE implementations obtain an initial consent to send by performing STUN connectivity checks. This document describes a new STUN usage with exchange of request and Perumal, et al. Standards Track [Page 2] RFC 7675 STUN Usage for Consent Freshness October 2015 response messages that verifies the remote peer's ongoing consent to receive traffic. This consent expires after a period of time and needs to be continually renewed, which ensures that consent can be terminated. This document defines what it takes to obtain, maintain, and lose consent to send. Consent to send applies to a single 5-tuple. HowShow full document text