Deprecating TLSv1.0 and TLSv1.1
draft-ietf-tls-oldversions-deprecate-02
Internet Engineering Task Force K. Moriarty
Internet-Draft Dell EMC
Updates: 8465 8422 7568 7562 7525 7507 S. Farrell
7465 7030 6750 6749 6739 6460 Trinity College Dublin
6084 6083 6367 6347 6176 6042 March 9, 2019
6012 5878 5734 5469 5456 5422
5415 5364 5281 5263 5238 5216
5158 5091 5054 5049 5024 5023
5019 5018 4992 4976 4975 4964
4851 4823 4791 4785 4744 4743
4732 4712 4681 4680 4642 4616
4582 4540 4531 4513 4497 4279
4261 4235 4217 4168 4162 4111
4097 3983 3943 3903 3887 3871
3856 3767 3749 3656 3568 3552
3501 3470 3436 3329 3261 (if
approved)
Intended status: Best Current Practice
Expires: September 10, 2019
Deprecating TLSv1.0 and TLSv1.1
draft-ietf-tls-oldversions-deprecate-02
Abstract
This document, if approved, formally deprecates Transport Layer
Security (TLS) versions 1.0 [RFC2246] and 1.1 [RFC4346] and moves
these documents to the historic state. These versions lack support
for current and recommended cipher suites, and various government and
industry profiles of applications using TLS now mandate avoiding
these old TLS versions. TLSv1.2 has been the recommended version for
IETF protocols since 2008, providing sufficient time to transition
away from older versions. Products having to support older versions
increase the attack surface unnecessarily and increase opportunities
for misconfigurations. Supporting these older versions also requires
additional effort for library and product maintenance.
This document also deprecates Datagram TLS (DTLS) version 1.0
[RFC6347] (but not DTLS version 1.2, and there is no DTLS version
1.1).
This document updates many RFCs that normatively refer to TLSv1.0 or
TLSv1.1 as described herein. This document also updates RFC 7525 and
hence is part of BCP195.
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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
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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 September 10, 2019.
Copyright Notice
Copyright (c) 2019 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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. RFCs Updated . . . . . . . . . . . . . . . . . . . . . . 4
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
2. Support for Deprecation . . . . . . . . . . . . . . . . . . . 4
3. SHA-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Do Not Use TLSv1.0 . . . . . . . . . . . . . . . . . . . . . 6
5. Do Not Use TLSv1.1 . . . . . . . . . . . . . . . . . . . . . 7
6. Updates to RFC7525 . . . . . . . . . . . . . . . . . . . . . 7
7. Security Considerations . . . . . . . . . . . . . . . . . . . 8
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 8
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
10.1. Normative References . . . . . . . . . . . . . . . . . . 8
10.2. Informative References . . . . . . . . . . . . . . . . . 16
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Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 21
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
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