[Samba] Samba 4 - disabling SSLv3 to mitigate POODLE effects

[Andrew Bartlett]

On Tue, 2014-11-04 at 11:07 +0000, Chris Alavoine wrote:
> Hi all,
> 
> Am trying to find a way to disable SSLv3 protocol in smb.conf on Samba4.
> 
> I am using the following:
> 
>         tls enabled  = yes
>         tls keyfile  = tls/myKey.pem
>         tls certfile = tls/myCert.pem
>         tls cafile   =
> 
> With a self-signed cert.
> 
> But when I remote connect from another host using:
> 
> openssl s_client -showcerts -connect samba4-dc:636 -ssl3
> 
> I get a successful connection.
> 
> Any ideas?

It would be up to whatever GNUTLS supports.

I agree we should fix it (and any clues as to how to - form the C code -
control the SSL stuff so we can expose it in a smb.conf option most
welcome), but my understanding is that this attack is much less feasible
on LDAP:
https://ludopoitou.wordpress.com/2014/10/16/poodle-ssl-bug-and-opendj/#comment-6703

-- 
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba