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Re: [PATCH] SSL: don't enable SSLv3 by default

Piotr Sikora
October 30, 2014 07:34PM
Hey Maxim,

> - SSLv3 is still important from compatibility point of view, there
> are various clients which doesn't support (or enable by default)
> anything better;

But is it, really?

All major browsers (Chrome [1], Firefox [2], IE [3], Opera [4]) either
already disabled SSLv3 or are about to do it.

Huge chunk of websites (>42% of Alexa's top 10.000 [5]) requires at
least TLSv1.0, including major properties like Facebook, Twitter [6],
Wikipedia [7] and websites that are using one of the popular CDNs
(CloudFlare [8], Akamai [9], MaxCDN [10], Fastly [11]).

OpenBSD and LibreSSL disabled SSLv3 by default [12].

Furthermore, when we disabled SSLv3 across our network [8] and gave
website owners the ability to opt-in back to it... less than 0.001%
did re-enable it.

Hopefully that list is long enough to convince you that SSLv3 is not
really important... Definitely not important enough to be enabled by
default, because that's what the commit changes, people can still
enable SSLv3 in the conf if they really need to.

[1] https://groups.google.com/a/chromium.org/forum/#!topic/security-dev/Vnhy9aKM_l4
[2] https://blog.mozilla.org/security/2014/10/14/the-poodle-attack-and-the-end-of-ssl-3-0/
[3] http://azure.microsoft.com/blog/2014/10/29/protecting-against-the-ssl-3-0-vulnerability/
[4] http://blogs.opera.com/security/2014/10/security-changes-opera-25-poodle-attacks/
[5] https://8ack.de/ssl/
[6] https://twitter.com/twittersecurity/status/522190947782643712
[7] https://blog.wikimedia.org/2014/10/17/protecting-users-against-poodle-by-removing-ssl-3-0-support/
[8] https://blog.cloudflare.com/sslv3-support-disabled-by-default-due-to-vulnerability/
[9] https://blogs.akamai.com/2014/10/poodle-faq-what-akamai-customers-need-to-know.html
[10] https://www.maxcdn.com/blog/delivery-sslv3-disabled/
[11] http://www.fastly.com/blog/fastly-update-POODLE/
[12] http://marc.info/?l=openbsd-cvs&m=141339479327258&w=2

Best regards,
Piotr Sikora

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Subject Author Views Posted

[PATCH] SSL: don't enable SSLv3 by default

Piotr Sikora 976 October 30, 2014 12:18AM

Re: [PATCH] SSL: don't enable SSLv3 by default

Maxim Dounin 579 October 30, 2014 09:48AM

Re: [PATCH] SSL: don't enable SSLv3 by default Attachments

Richard Fussenegger 529 October 30, 2014 10:08AM

Re: [PATCH] SSL: don't enable SSLv3 by default

Maxim Dounin 647 October 30, 2014 11:28AM

Re: [PATCH] SSL: don't enable SSLv3 by default Attachments

Richard Fussenegger 586 October 30, 2014 11:32AM

Re: [PATCH] SSL: don't enable SSLv3 by default

Maxim Dounin 542 October 30, 2014 11:48AM

Re: [PATCH] SSL: don't enable SSLv3 by default Attachments

Richard Fussenegger 563 October 30, 2014 11:56AM

Re: [PATCH] SSL: don't enable SSLv3 by default

Piotr Sikora 750 October 30, 2014 07:34PM

Re: [PATCH] SSL: don't enable SSLv3 by default

Maxim Dounin 553 October 31, 2014 12:26AM

Re: [PATCH] SSL: don't enable SSLv3 by default

nginxorg 1015 October 31, 2014 09:36AM



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