GnuTLS for samba-4.12.x on RHEL7 / CentOS 7: encourage or discourage?

Andreas Schneider asn at
Thu Jun 18 05:58:47 UTC 2020

On Thursday, 18 June 2020 06:11:18 CEST Andrew Bartlett via samba-technical 
> On Thu, 2020-06-18 at 04:46 +0100, Sérgio Basto via samba wrote:
> > On Thu, 2020-06-18 at 14:43 +1200, Andrew Bartlett via samba wrote:
> > > If we could get an even more modern version then we can consider
> > > removing even more duplicate in-house cryptography.
> > 
> > Thank you , glad to help .
> > 
> > You mean do compat-gnutls36 packages ? IIRC, already when I tried to
> > build gnutls-3.5, I found that we need to update and build many more
> > package dependencies ...
> Thanks for that extra information.  I wondered what the issue was.
> Now, the big question I wanted to ask you is this:
> It is one thing to give us a really big helping hand for development,
> but I wondered how comfortable are you with being the repository for a
> security-sensitive package being used significant number of production
> Samba sites?
> Do you have the resources to ensure that if GnuTLS issues a security
> advisory impacting GnuTLS 3.4 that you backport the patches?  I notice
> a number of issues here:
> Or should we instead strongly discourage the use of Samba 4.12,
> particularly as an AD DC (because the LDAP server exposes TLS, which
> seems to be a more likely target), on RHEL7 / CentOS 7?
> (We would instead suggest that an upgrade to RHEL8 / CentOS 8 instead).

You should upgrade to RHEL8 or CentOS8 which offers a modern GnuTLS library.

Especially because GnuTLS in RHEL8 will either be rebased to newer versions or 
patches will be backported required by Samba.


Andreas Schneider                      asn at
Samba Team                   
GPG-ID:     8DFF53E18F2ABC8D8F3C92237EE0FC4DCC014E3D

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