On Sat, Jun 28, 2014 at 06:34:01PM +0100, Dominyk Tiller wrote:
> Hey all,
> 
> I wondered if you all had an opinion on disabling SSLv2 & SSLv3 during
> the ./configure process, and what kind of impact that'd have for
> end-users and general compatibility when building against an updated
> version of OpenSSL.

Debian has been build with no SSLv2 support since 2011.  There
were a few minor issues solved, but none of them were actually
related to talking to other peers.  I didn't get any complained
about not having SSLv2 support.

Last time I check there were still a few sites that only talk
SSL v2, but I guess the numbers are so low that they can and
should be ignored.

Most servers that support SSLv3 also support TLS 1.0.  It should
probably be doable to disable SSLv3 without much impact.

The most recent stats about servers I know about is:
https://lists.fedoraproject.org/pipermail/security/2014-April/001810.html

But I'm guessing you're more interested in the client side
support for TLS 1.0 or higher.  I don't have any real numbers
about it, but I'm actually less worried about the clients.

Anyway, I wouldn't mind seeing a patch that would make it possible
to build openssl without SSLv3 support.  That doesn't mean it's
going to be enabled by default, but it would give people the
option to disable it if they want to.

If you make such a patch, I might disable SSLv3 support in Debian,
but that's unlikely to make it in jessie.


Kurt

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