Deprecating TLSv1.0 and TLSv1.1
draft-ietf-tls-oldversions-deprecate-10
Internet Engineering Task Force K. Moriarty
Internet-Draft Dell EMC
Obsoletes: 5469 7507 (if approved) S. Farrell
Updates: 8422 8261 7568 7562 7525 7465 Trinity College Dublin
7030 6750 6749 6739 6460 6614 December 14, 2020
6367 6353 6347 6176 6084 6083
6042 6012 5953 5878 5734 5456
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3871 3856 3767 3749 3656 3568
3552 3501 3470 3436 3329 3261
(if approved)
Intended status: Best Current Practice
Expires: June 17, 2021
Deprecating TLSv1.0 and TLSv1.1
draft-ietf-tls-oldversions-deprecate-10
Abstract
This document, if approved, formally deprecates Transport Layer
Security (TLS) versions 1.0 (RFC 2246) and 1.1 (RFC 4346).
Accordingly, those documents (will be moved|have been moved) to
Historic status. These versions lack support for current and
recommended cryptographic algorithms and mechanisms, 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. Removing
support for older versions from implementations reduces the attack
surface, reduces opportunity for misconfiguration, and streamlines
library and product maintenance.
This document also deprecates Datagram TLS (DTLS) version 1.0
(RFC4347), 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 the best
practices for TLS usage in 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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://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 June 17, 2021.
Copyright Notice
Copyright (c) 2020 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 . . . . . . . . . . . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
2. Support for Deprecation . . . . . . . . . . . . . . . . . . . 5
3. SHA-1 Usage Problematic in TLSv1.0 and TLSv1.1 . . . . . . . 6
4. Do Not Use TLSv1.0 . . . . . . . . . . . . . . . . . . . . . 6
5. Do Not Use TLSv1.1 . . . . . . . . . . . . . . . . . . . . . 7
6. Updates to RFC7525 . . . . . . . . . . . . . . . . . . . . . 8
7. Operational Considerations . . . . . . . . . . . . . . . . . 8
8. Security Considerations . . . . . . . . . . . . . . . . . . . 9
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 9
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
11.1. Normative References . . . . . . . . . . . . . . . . . . 9
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11.2. Informative References . . . . . . . . . . . . . . . . . 18
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