Using Transport Layer Security (TLS) with Network News Transfer Protocol (NNTP)
RFC 8143
| Document | Type |
RFC - Proposed Standard
(April 2017; No errata)
Updates RFC 4642
Was draft-elie-nntp-tls-recommendations (individual in art area)
|
|
|---|---|---|---|
| Last updated | 2017-04-21 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | No shepherd assigned | ||
| Shepherd write-up | Show (last changed 2017-01-21) | ||
| IESG | IESG state | RFC 8143 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Alexey Melnikov | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) J. Elie
Request for Comments: 8143 April 2017
Updates: 4642
Category: Standards Track
ISSN: 2070-1721
Using Transport Layer Security (TLS)
with Network News Transfer Protocol (NNTP)
Abstract
This document provides recommendations for improving the security of
the Network News Transfer Protocol (NNTP) when using Transport Layer
Security (TLS). It modernizes the NNTP usage of TLS to be consistent
with TLS best current practices. This document updates RFC 4642.
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 7841.
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/rfc8143.
Copyright Notice
Copyright (c) 2017 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.
Elie Standards Track [Page 1]
RFC 8143 Using TLS with NNTP April 2017
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Conventions Used in This Document . . . . . . . . . . . . 3
2. Updates/Changes to RFC 4642 . . . . . . . . . . . . . . . . . 3
3. Recommendations . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Compression . . . . . . . . . . . . . . . . . . . . . . . 4
3.2. Protocol Versions and Security Preferences . . . . . . . 4
3.3. Server Name Indication . . . . . . . . . . . . . . . . . 5
3.4. Prevention of SSL Stripping . . . . . . . . . . . . . . . 5
3.5. Authenticated Connections . . . . . . . . . . . . . . . . 5
3.6. Human Factors . . . . . . . . . . . . . . . . . . . . . . 6
4. Security Considerations . . . . . . . . . . . . . . . . . . . 7
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1. Normative References . . . . . . . . . . . . . . . . . . 7
6.2. Informative References . . . . . . . . . . . . . . . . . 9
Appendix A. Detailed Changes to RFC 4642 . . . . . . . . . . . . 11
A.1. Related to TLS-Level Compression . . . . . . . . . . . . 11
A.2. Related to Implicit TLS . . . . . . . . . . . . . . . . . 11
A.3. Related to RC4 Cipher Suites . . . . . . . . . . . . . . 12
A.4. Related to Server Name Indication . . . . . . . . . . . . 12
A.5. Related to Certificate Verification . . . . . . . . . . . 12
A.6. Related to Other Obsolete Wording . . . . . . . . . . . . 13
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 13
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 13
1. Introduction
The Network News Transfer Protocol (NNTP) [RFC3977] has been using
Transport Layer Security (TLS) [RFC5246] along with its precursor,
Secure Sockets Layer (SSL), since at least the year 2000. The use of
TLS in NNTP was formalized in [RFC4642], providing implementation
recommendations at the same time. In order to address the evolving
threat model on the Internet today, this document provides stronger
recommendations regarding that use.
In particular, this document updates [RFC4642] by specifying that
NNTP implementations and deployments MUST follow the best current
practices documented in [BCP195], which currently consists of RFC
7525 ("Recommendations for Secure Use of Transport Layer Security
(TLS) and Datagram Transport Layer Security (DTLS)"). This includes
stronger recommendations regarding SSL/TLS protocol versions,
fallback to lower versions, TLS negotiation, TLS-level compression,
TLS session resumption, cipher suites, public key lengths, forward
secrecy, hostname validation, certificate verification, and other
aspects of using TLS with NNTP.
Elie Standards Track [Page 2]
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