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SSL Labs Grade Change for TLS 1.0 and TLS 1.1 Protocols

Update 11/30/18: Now live on ssllabs.com: In Configuration->Protocols section “TLS 1.1” text color will be changed to Orange by end of November 2018

TLS 1.0 and TLS 1.1 protocols will be removed from browsers at the beginning of 2020. As there are no fixes or patches that can adequately fix SSL or deprecated TLS, it is critically important that organizations upgrade to a secure alternative as soon as possible.

Various Browser clients have provided approximate deadlines for disabling TLS 1.0 and TLS 1.1 protocol:

Browser Name Date
Microsoft IE and Edge First half of 2020
Mozilla Firefox March 2020
Safari/Webkit March 2020
Google Chrome January 2020

 

Best practices outlined in RFC-7525 give reasons why it is discouraged to use protocol TLS 1.0 and TLS 1.1. PCI-DSS recommends users to switch from protocol TLS 1.0 and adopt protocol TLS 1.2+.

Following table shows for each browser the percentage of connections made to SSL/TLS servers using protocol TLS 1.0 and TLS 1.1:

Browser/Client Name Percentage (%) – Both TLS 1.1 and TLS 1.0
Microsoft IE and Edge 0.72%
Mozilla Firefox 1.2%
Safari/Webkit 0.36%
Google Chrome 0.5%
SSL Pulse November 2018 5.84%

 

SSL Labs Grade Change

To encourage users to migrate to protocol TLS 1.2+ and remove protocol TLS 1.1 and TLS 1.0 from servers, SSL Labs will lower the grade for SSL/TLS servers which use TLS 1.1 and TLS 1.0.

TLS 1.0 Grade change date:

  • A warning will be displayed for downgrading to grade “B” by end of September 2019
  • Grade will be changed to “B” by end of March 2020

TLS 1.1 Grade change date:

  • In Configuration->Protocols section “TLS 1.1” text color will be changed to Orange by end of November 2018
  • A warning will be displayed for downgrading to grade “B” by end of September 2019
  • Grade will be changed to “B” by end of March 2020

Existing Grades Sample

Server Configuration Grade
TLS 1.2, TLS 1.1, TLS 1.0 + HSTS + No Warning + TLS_FALLBACK_SCSV A+
TLS 1.2, TLS 1.1, TLS 1.0 + HSTS + No Warning +  No support for TLS_FALLBACK_SCSV A
TLS 1.2, TLS 1.1, TLS 1.0 + HSTS + Warnings + No support for TLS_FALLBACK_SCSV A-

 

Future Grades Sample

Server Configuration Grade
TLS 1.2, TLS 1.1, TLS 1.0 + HSTS + No Warning + TLS_FALLBACK_SCSV B
TLS 1.2, TLS 1.1, TLS 1.0 + HSTS + No Warning +  No support for TLS_FALLBACK_SCSV B
TLS 1.2, TLS 1.1, TLS 1.0 + HSTS + Warnings + No support for TLS_FALLBACK_SCSV B
TLS 1.2 + HSTS + No Warning + TLS_FALLBACK_SCSV A+
TLS 1.2 + HSTS + No Warning + No support for TLS_FALLBACK_SCSV A
TLS 1.2 + HSTS + Warnings + No support for TLS_FALLBACK_SCSV A-

 

References

3 responses to “SSL Labs Grade Change for TLS 1.0 and TLS 1.1 Protocols”

  1. Can the FALLBACK_SCSV requirement be removed? Every SSL library and browser out there has basically completely removed fallbacks, and you mentioned that the requirement for A+ would go away if TLS 1.3 didn’t reintroduce the fallback. It didn’t reintroduce the fallback.

  2. You may also want to update SSL Pulse:
    * TLSv1.1 yellow rather than green (like TLSv1.0);
    * TLSv1.1 and TLSv1.0: green color when negative variation;
    * Key Strength Distribution: remove “Below 2048 bits”;
    * Key Strength Distribution: green color on negative variation of 2048 bits (it’s the minimum accepted);
    * Forward Secrecy: green color on negative variation of everything but “Used with most browser”;
    * Certificate Signature Algorithms: remove SHA1.

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