Re: [TLS] Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt

[Eric Rescorla <[e-mail]>]

On Mon, Jul 9, 2018 at 9:54 AM, Eric Rescorla <[e-mail]> wrote:

> Thanks for writing this.
>
> I would be in favor of deprecating old versions of TLS prior to 1.2.
> Firefox Telemetry shows that about 1% of our connections are TLS 1.1
>

This should be 1.0.


(on the same data set, TLS 1.3 is > 5%), and TLS 1.1 is negligible.
>
> This is probably a higher number than we'd be comfortable turning off
> immediately, but it is probably worth starting the process.
>
> -Ekr
>
>
> On Mon, Jul 9, 2018 at 9:40 AM, Kathleen Moriarty <
> [e-mail]> wrote:
>
>> Hello,
>>
>> Stephen and I posted the draft below to see if the TLS working group
>> is ready to take steps to deprecate TLSv1.0 and TLSv1.1.  There has
>> been a recent drop off in usage for web applications due to the PCI
>> Council recommendation to move off TLSv1.0, with a recommendation to
>> go to TLSv1.2 by June 30th.  NIST has also been recommending TLSv1.2
>> as a baseline.  Applications other than those using HTTP may not have
>> had the same reduction in usage.  If you are responsible for services
>> where you have a reasonable vantage point to gather and share
>> statistics to assess usage further, that could be helpful for the
>> discussion.  We've received some feedback that has been incorporated
>> into the working draft and feelers in general have been positive.  It
>> would be good to know if there are any show stoppers that have not
>> been considered.
>>
>> https://github.com/sftcd/tls-oldversions-diediedie
>>
>> Thanks in advance,
>> Kathleen
>>
>>
>> ---------- Forwarded message ----------
>> From:  <[e-mail]>
>> Date: Mon, Jun 18, 2018 at 3:05 PM
>> Subject: New Version Notification for
>> draft-moriarty-tls-oldversions-diediedie-00.txt
>> To: Stephen Farrell <[e-mail]>, Kathleen Moriarty
>> <[e-mail]>
>>
>>
>>
>> A new version of I-D, draft-moriarty-tls-oldversions-diediedie-00.txt
>> has been successfully submitted by Stephen Farrell and posted to the
>> IETF repository.
>>
>> Name:           draft-moriarty-tls-oldversions-diediedie
>> Revision:       00
>> Title:          Deprecating TLSv1.0 and TLSv1.1
>> Document date:  2018-06-18
>> Group:          Individual Submission
>> Pages:          10
>> URL:
>> https://www.ietf.org/internet-drafts/draft-moriarty-tls-oldv
>> ersions-diediedie-00.txt
>> Status:
>> https://datatracker.ietf.org/doc/draft-moriarty-tls-oldversi
>> ons-diediedie/
>> Htmlized:
>> https://tools.ietf.org/html/draft-moriarty-tls-oldversions-diediedie-00
>> Htmlized:
>> https://datatracker.ietf.org/doc/html/draft-moriarty-tls-old
>> versions-diediedie
>>
>>
>> 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 profiiles 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.
>>
>>
>>
>>
>> Please note that it may take a couple of minutes from the time of
>> submission
>> until the htmlized version and diff are available at tools.ietf.org.
>>
>> The IETF Secretariat
>>
>>
>>
>> --
>>
>> Best regards,
>> Kathleen
>>
>> _______________________________________________
>> TLS mailing list
>> [e-mail]
>> https://www.ietf.org/mailman/listinfo/tls
>>
>
>