Deprecating TLSv1.0 and TLSv1.1
draft-ietf-tls-oldversions-deprecate-00
Internet Engineering Task Force K. Moriarty
Internet-Draft Dell EMC
Updates: [[List TBD]] (if approved) S. Farrell
Intended status: Standards Track Trinity College Dublin
Expires: March 18, 2019 September 14, 2018
Deprecating TLSv1.0 and TLSv1.1
draft-ietf-tls-oldversions-deprecate-00
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 updates the backward compatibility sections of TLS RFCs
[[list TBD]] to prohibit fallback to TLSv1.0 and TLSv1.1. This
document also updates RFC 7525.
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 March 18, 2019.
Moriarty & Farrell Expires March 18, 2019 [Page 1]
Internet-Draft Deprecating TLSv1.0 and TLSv1.1 September 2018
Copyright Notice
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Support for Deprecation . . . . . . . . . . . . . . . . . . . 4
3. Removing Support . . . . . . . . . . . . . . . . . . . . . . 5
4. Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1. Web . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2. Mail . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.3. Operating Systems . . . . . . . . . . . . . . . . . . . . 6
4.4. Enterprise Networks . . . . . . . . . . . . . . . . . . . 7
5. SHA-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6. Do Not Use TLSv1.0 . . . . . . . . . . . . . . . . . . . . . 8
7. Do Not Use TLSv1.1 . . . . . . . . . . . . . . . . . . . . . 8
8. Do Not Use SHA-1 in TLSv1.2 . . . . . . . . . . . . . . . . . 9
9. Updates to RFC7525 . . . . . . . . . . . . . . . . . . . . . 9
10. Security Considerations . . . . . . . . . . . . . . . . . . . 10
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 10
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
13. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
13.1. Normative References . . . . . . . . . . . . . . . . . . 10
13.2. Informative References . . . . . . . . . . . . . . . . . 11
Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 14
1. Introduction
[[Text in double-square brackets is intended to be fixed as the draft
evolves. You've seen that we need to figure out the list of RFCs
that this'd update in the abstract. There is a repo for this at:
https://github.com/tlswg/oldversions-deprecate - PRs (on the xml
file) are welcome there.]]
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