[Announce] Samba 4.4.5, 4.3.11 and 4.2.14 Security Releases Available for Download

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[Announce] Samba 4.4.5, 4.3.11 and 4.2.14 Security Releases Available for Download

Karolin Seeger-2
Release Announcements
---------------------

These are a security release in order to address the following defect:

o  CVE-2016-2119 (Client side SMB2/3 required signing can be downgraded)

=======
Details
=======

o  CVE-2016-2119:
   It's possible for an attacker to downgrade the required signing for
   an SMB2/3 client connection, by injecting the SMB2_SESSION_FLAG_IS_GUEST
   or SMB2_SESSION_FLAG_IS_NULL flags.

   This means that the attacker can impersonate a server being connected to by
   Samba, and return malicious results.

   The primary concern is with winbindd, as it uses DCERPC over SMB2 when talking
   to domain controllers as a member server, and trusted domains as a domain
   controller.  These DCE/RPC connections were intended to protected by the
   combination of "client ipc signing" and
   "client ipc max protocol" in their effective default settings
   ("mandatory" and "SMB3_11").

   Additionally, management tools like net, samba-tool and rpcclient use DCERPC
   over SMB2/3 connections.

   By default, other tools in Samba are unprotected, but rarely they are
   configured to use smb signing, via the "client signing" parameter (the default
   is "if_required").  Even more rarely the "client max protocol" is set to SMB2,
   rather than the NT1 default.

   If both these conditions are met, then this issue would also apply to these
   other tools, including command line tools like smbcacls, smbcquota, smbclient,
   smbget and applications using libsmbclient.


Changes:
--------

o  Stefan Metzmacher <[hidden email]>
   * BUG 11860: CVE-2016-2119: Fix client side SMB2 signing downgrade.
   * BUG 11948: Total dcerpc response payload more than 0x400000.


#######################################
Reporting bugs & Development Discussion
#######################################

Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical IRC channel on irc.freenode.net.

If you do report problems then please try to send high quality
feedback. If you don't provide vital information to help us track down
the problem then you will probably be ignored.  All bug reports should
be filed under the "Samba 4.1 and newer" product in the project's Bugzilla
database (https://bugzilla.samba.org/).


======================================================================
== Our Code, Our Bugs, Our Responsibility.
== The Samba Team
======================================================================


Release notes for older releases follow:

================
Download Details
================

The uncompressed tarballs and patch files have been signed
using GnuPG (ID 6568B7EA).  The source code can be downloaded
from:

        https://download.samba.org/pub/samba/stable/

The release notes are available online at:

        https://www.samba.org/samba/history/samba-4.4.5.html
        https://www.samba.org/samba/history/samba-4.3.11.html
        https://www.samba.org/samba/history/samba-4.2.14.html

Our Code, Our Bugs, Our Responsibility.
(https://bugzilla.samba.org/)

                        --Enjoy
                        The Samba Team


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