[Bug 986147] Re: openssl 1.0.1-4ubuntu2 breaks a bunch of ciphers

[Seth Arnold]

jsnydr, klavs, kylea, note that you may also be experiencing what is
documented at
https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/861137 -- some
servers and services cannot handle TLS 1.1 or newer handshakes.

It would be worth going to some effort to determine if your peers can
handle TLS 1.1 or TLS 1.2 connections, and if not, file bug reports or
trouble tickets with the vendors of those services or servers.

Thanks

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https://bugs.launchpad.net/bugs/986147

Title:
  openssl 1.0.1-4ubuntu2 breaks a bunch of ciphers

Status in “openssl” package in Ubuntu:
  Fix Released
Status in “openssl” source package in Precise:
  Fix Released

Bug description:
  in version 1.0.1-4ubuntu2, we see:

  
  openssl (1.0.1-4ubuntu2) precise-proposed; urgency=low

    * Backport more upstream patches to work around TLS 1.2 failures
      (LP #965371):
  ...
      - Truncate the number of ciphers sent in the client hello to 50.  Most
        broken servers should now work.
   ...

   -- Colin Watson <cjwatson at ubuntu.com>  Wed, 18 Apr 2012 15:03:56
  +0100

  We have a server which offers a very small number of ciphers. When
  this change hit, suddenly our hosts could no longer contact this
  server, getting the error:

  
  $ openssl s_client -connect HOSTNAME:9140 
  CONNECTED(00000003) 
  139736292189856:error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure:s23_clnt.c:724: 

  The problem here was tracked down to a failure to find a matching
  cipher. If we specify -cipher RC4-SSH (the only one essentially which
  the server permits) or -ssl3, the connection succeeds.

  The problem is this truncation of the number of ciphers sent. RC4-SSH
  shows up at something like #74 on our list, so it is getting
  truncated. When we specify exactly the cipher to use, of course it
  works, and if we say -ssl3, then that also reduces the number which
  would be sent, and now RC4-SSH is in the top fifty again.

  This is a pretty disastrous change, in fact; it means that openssl
  basically now supports only fifty ciphers at a time, and then an
  essentially random and unpredictable set. Not only does this mean a
  loss of functionality, it could be a loss in security if clients get
  pushed to less secure ciphers because the more secure ones happened to
  be after number fifty in the list.

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