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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: samba security and bug fix update
Advisory ID:       RHSA-2016:1486-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-1486.html
Issue date:        2016-07-26
CVE Names:         CVE-2016-2119 
=====================================================================

1. Summary:

An update for samba is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Resilient Storage (v. 7) - x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

3. Description:

Samba is an open-source implementation of the Server Message Block (SMB)
protocol and the related Common Internet File System (CIFS) protocol, which
allow PC-compatible machines to share files, printers, and various
information.

Security Fix(es):

* A flaw was found in the way Samba initiated signed DCE/RPC connections. A
man-in-the-middle attacker could use this flaw to downgrade the connection
to not use signing and therefore impersonate the server. (CVE-2016-2119)

Red Hat would like to thank the Samba project for reporting this issue.
Upstream acknowledges Stefan Metzmacher as the original reporter.

Bug Fix(es):

* Previously, the "net" command in some cases failed to join the client to
Active Directory (AD) because the permissions setting prevented
modification of the supported Kerberos encryption type LDAP attribute. With
this update, Samba has been fixed to allow joining an AD domain as a user.
In addition, Samba now uses the machine account credentials to set up the
Kerberos encryption types within AD for the joined machine. As a result,
using "net" to join a domain now works more reliably. (BZ#1351260)

* Previously, the idmap_hash module worked incorrectly when it was used
together with other modules. As a consequence, user and group IDs were not
mapped properly. A patch has been applied to skip already configured
modules. Now, the hash module can be used as the default idmap
configuration back end and IDs are resolved correctly. (BZ#1350759)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the smb service will be restarted
automatically.

5. Bugs fixed (https://bugzilla.redhat.com/):

1350759 - idmap_hash module works incorrectly when used with other backend modules
1351260 - net ads join throws "Failed to join domain: failed to set machine kerberos encryption types: Insufficient access"
1351955 - CVE-2016-2119 samba: Client side SMB2/3 required signing can be downgraded

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
samba-4.2.10-7.el7_2.src.rpm

noarch:
samba-common-4.2.10-7.el7_2.noarch.rpm

x86_64:
libsmbclient-4.2.10-7.el7_2.i686.rpm
libsmbclient-4.2.10-7.el7_2.x86_64.rpm
libwbclient-4.2.10-7.el7_2.i686.rpm
libwbclient-4.2.10-7.el7_2.x86_64.rpm
samba-client-4.2.10-7.el7_2.x86_64.rpm
samba-client-libs-4.2.10-7.el7_2.i686.rpm
samba-client-libs-4.2.10-7.el7_2.x86_64.rpm
samba-common-libs-4.2.10-7.el7_2.x86_64.rpm
samba-common-tools-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm
samba-libs-4.2.10-7.el7_2.i686.rpm
samba-libs-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-clients-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-modules-4.2.10-7.el7_2.i686.rpm
samba-winbind-modules-4.2.10-7.el7_2.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

noarch:
samba-pidl-4.2.10-7.el7_2.noarch.rpm

x86_64:
libsmbclient-devel-4.2.10-7.el7_2.i686.rpm
libsmbclient-devel-4.2.10-7.el7_2.x86_64.rpm
libwbclient-devel-4.2.10-7.el7_2.i686.rpm
libwbclient-devel-4.2.10-7.el7_2.x86_64.rpm
samba-4.2.10-7.el7_2.x86_64.rpm
samba-dc-4.2.10-7.el7_2.x86_64.rpm
samba-dc-libs-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm
samba-devel-4.2.10-7.el7_2.i686.rpm
samba-devel-4.2.10-7.el7_2.x86_64.rpm
samba-python-4.2.10-7.el7_2.x86_64.rpm
samba-test-4.2.10-7.el7_2.x86_64.rpm
samba-test-devel-4.2.10-7.el7_2.x86_64.rpm
samba-test-libs-4.2.10-7.el7_2.i686.rpm
samba-test-libs-4.2.10-7.el7_2.x86_64.rpm
samba-vfs-glusterfs-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-krb5-locator-4.2.10-7.el7_2.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
samba-4.2.10-7.el7_2.src.rpm

noarch:
samba-common-4.2.10-7.el7_2.noarch.rpm

x86_64:
libsmbclient-4.2.10-7.el7_2.i686.rpm
libsmbclient-4.2.10-7.el7_2.x86_64.rpm
libwbclient-4.2.10-7.el7_2.i686.rpm
libwbclient-4.2.10-7.el7_2.x86_64.rpm
samba-client-4.2.10-7.el7_2.x86_64.rpm
samba-client-libs-4.2.10-7.el7_2.i686.rpm
samba-client-libs-4.2.10-7.el7_2.x86_64.rpm
samba-common-libs-4.2.10-7.el7_2.x86_64.rpm
samba-common-tools-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm
samba-libs-4.2.10-7.el7_2.i686.rpm
samba-libs-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-clients-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-modules-4.2.10-7.el7_2.i686.rpm
samba-winbind-modules-4.2.10-7.el7_2.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

noarch:
samba-pidl-4.2.10-7.el7_2.noarch.rpm

x86_64:
libsmbclient-devel-4.2.10-7.el7_2.i686.rpm
libsmbclient-devel-4.2.10-7.el7_2.x86_64.rpm
libwbclient-devel-4.2.10-7.el7_2.i686.rpm
libwbclient-devel-4.2.10-7.el7_2.x86_64.rpm
samba-4.2.10-7.el7_2.x86_64.rpm
samba-dc-4.2.10-7.el7_2.x86_64.rpm
samba-dc-libs-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm
samba-devel-4.2.10-7.el7_2.i686.rpm
samba-devel-4.2.10-7.el7_2.x86_64.rpm
samba-python-4.2.10-7.el7_2.x86_64.rpm
samba-test-4.2.10-7.el7_2.x86_64.rpm
samba-test-devel-4.2.10-7.el7_2.x86_64.rpm
samba-test-libs-4.2.10-7.el7_2.i686.rpm
samba-test-libs-4.2.10-7.el7_2.x86_64.rpm
samba-vfs-glusterfs-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-krb5-locator-4.2.10-7.el7_2.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
samba-4.2.10-7.el7_2.src.rpm

noarch:
samba-common-4.2.10-7.el7_2.noarch.rpm

ppc64:
libsmbclient-4.2.10-7.el7_2.ppc.rpm
libsmbclient-4.2.10-7.el7_2.ppc64.rpm
libwbclient-4.2.10-7.el7_2.ppc.rpm
libwbclient-4.2.10-7.el7_2.ppc64.rpm
samba-4.2.10-7.el7_2.ppc64.rpm
samba-client-4.2.10-7.el7_2.ppc64.rpm
samba-client-libs-4.2.10-7.el7_2.ppc.rpm
samba-client-libs-4.2.10-7.el7_2.ppc64.rpm
samba-common-libs-4.2.10-7.el7_2.ppc64.rpm
samba-common-tools-4.2.10-7.el7_2.ppc64.rpm
samba-debuginfo-4.2.10-7.el7_2.ppc.rpm
samba-debuginfo-4.2.10-7.el7_2.ppc64.rpm
samba-libs-4.2.10-7.el7_2.ppc.rpm
samba-libs-4.2.10-7.el7_2.ppc64.rpm
samba-winbind-4.2.10-7.el7_2.ppc64.rpm
samba-winbind-clients-4.2.10-7.el7_2.ppc64.rpm
samba-winbind-modules-4.2.10-7.el7_2.ppc.rpm
samba-winbind-modules-4.2.10-7.el7_2.ppc64.rpm

ppc64le:
libsmbclient-4.2.10-7.el7_2.ppc64le.rpm
libwbclient-4.2.10-7.el7_2.ppc64le.rpm
samba-4.2.10-7.el7_2.ppc64le.rpm
samba-client-4.2.10-7.el7_2.ppc64le.rpm
samba-client-libs-4.2.10-7.el7_2.ppc64le.rpm
samba-common-libs-4.2.10-7.el7_2.ppc64le.rpm
samba-common-tools-4.2.10-7.el7_2.ppc64le.rpm
samba-debuginfo-4.2.10-7.el7_2.ppc64le.rpm
samba-libs-4.2.10-7.el7_2.ppc64le.rpm
samba-winbind-4.2.10-7.el7_2.ppc64le.rpm
samba-winbind-clients-4.2.10-7.el7_2.ppc64le.rpm
samba-winbind-modules-4.2.10-7.el7_2.ppc64le.rpm

s390x:
libsmbclient-4.2.10-7.el7_2.s390.rpm
libsmbclient-4.2.10-7.el7_2.s390x.rpm
libwbclient-4.2.10-7.el7_2.s390.rpm
libwbclient-4.2.10-7.el7_2.s390x.rpm
samba-4.2.10-7.el7_2.s390x.rpm
samba-client-4.2.10-7.el7_2.s390x.rpm
samba-client-libs-4.2.10-7.el7_2.s390.rpm
samba-client-libs-4.2.10-7.el7_2.s390x.rpm
samba-common-libs-4.2.10-7.el7_2.s390x.rpm
samba-common-tools-4.2.10-7.el7_2.s390x.rpm
samba-debuginfo-4.2.10-7.el7_2.s390.rpm
samba-debuginfo-4.2.10-7.el7_2.s390x.rpm
samba-libs-4.2.10-7.el7_2.s390.rpm
samba-libs-4.2.10-7.el7_2.s390x.rpm
samba-winbind-4.2.10-7.el7_2.s390x.rpm
samba-winbind-clients-4.2.10-7.el7_2.s390x.rpm
samba-winbind-modules-4.2.10-7.el7_2.s390.rpm
samba-winbind-modules-4.2.10-7.el7_2.s390x.rpm

x86_64:
libsmbclient-4.2.10-7.el7_2.i686.rpm
libsmbclient-4.2.10-7.el7_2.x86_64.rpm
libwbclient-4.2.10-7.el7_2.i686.rpm
libwbclient-4.2.10-7.el7_2.x86_64.rpm
samba-4.2.10-7.el7_2.x86_64.rpm
samba-client-4.2.10-7.el7_2.x86_64.rpm
samba-client-libs-4.2.10-7.el7_2.i686.rpm
samba-client-libs-4.2.10-7.el7_2.x86_64.rpm
samba-common-libs-4.2.10-7.el7_2.x86_64.rpm
samba-common-tools-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm
samba-libs-4.2.10-7.el7_2.i686.rpm
samba-libs-4.2.10-7.el7_2.x86_64.rpm
samba-python-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-clients-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-modules-4.2.10-7.el7_2.i686.rpm
samba-winbind-modules-4.2.10-7.el7_2.x86_64.rpm

Red Hat Enterprise Linux Server Resilient Storage (v. 7):

x86_64:
ctdb-4.2.10-7.el7_2.x86_64.rpm
ctdb-devel-4.2.10-7.el7_2.i686.rpm
ctdb-devel-4.2.10-7.el7_2.x86_64.rpm
ctdb-tests-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

noarch:
samba-pidl-4.2.10-7.el7_2.noarch.rpm

ppc64:
libsmbclient-devel-4.2.10-7.el7_2.ppc.rpm
libsmbclient-devel-4.2.10-7.el7_2.ppc64.rpm
libwbclient-devel-4.2.10-7.el7_2.ppc.rpm
libwbclient-devel-4.2.10-7.el7_2.ppc64.rpm
samba-dc-4.2.10-7.el7_2.ppc64.rpm
samba-dc-libs-4.2.10-7.el7_2.ppc64.rpm
samba-debuginfo-4.2.10-7.el7_2.ppc.rpm
samba-debuginfo-4.2.10-7.el7_2.ppc64.rpm
samba-devel-4.2.10-7.el7_2.ppc.rpm
samba-devel-4.2.10-7.el7_2.ppc64.rpm
samba-python-4.2.10-7.el7_2.ppc64.rpm
samba-test-4.2.10-7.el7_2.ppc64.rpm
samba-test-devel-4.2.10-7.el7_2.ppc64.rpm
samba-test-libs-4.2.10-7.el7_2.ppc.rpm
samba-test-libs-4.2.10-7.el7_2.ppc64.rpm
samba-winbind-krb5-locator-4.2.10-7.el7_2.ppc64.rpm

ppc64le:
libsmbclient-devel-4.2.10-7.el7_2.ppc64le.rpm
libwbclient-devel-4.2.10-7.el7_2.ppc64le.rpm
samba-dc-4.2.10-7.el7_2.ppc64le.rpm
samba-dc-libs-4.2.10-7.el7_2.ppc64le.rpm
samba-debuginfo-4.2.10-7.el7_2.ppc64le.rpm
samba-devel-4.2.10-7.el7_2.ppc64le.rpm
samba-python-4.2.10-7.el7_2.ppc64le.rpm
samba-test-4.2.10-7.el7_2.ppc64le.rpm
samba-test-devel-4.2.10-7.el7_2.ppc64le.rpm
samba-test-libs-4.2.10-7.el7_2.ppc64le.rpm
samba-winbind-krb5-locator-4.2.10-7.el7_2.ppc64le.rpm

s390x:
libsmbclient-devel-4.2.10-7.el7_2.s390.rpm
libsmbclient-devel-4.2.10-7.el7_2.s390x.rpm
libwbclient-devel-4.2.10-7.el7_2.s390.rpm
libwbclient-devel-4.2.10-7.el7_2.s390x.rpm
samba-dc-4.2.10-7.el7_2.s390x.rpm
samba-dc-libs-4.2.10-7.el7_2.s390x.rpm
samba-debuginfo-4.2.10-7.el7_2.s390.rpm
samba-debuginfo-4.2.10-7.el7_2.s390x.rpm
samba-devel-4.2.10-7.el7_2.s390.rpm
samba-devel-4.2.10-7.el7_2.s390x.rpm
samba-python-4.2.10-7.el7_2.s390x.rpm
samba-test-4.2.10-7.el7_2.s390x.rpm
samba-test-devel-4.2.10-7.el7_2.s390x.rpm
samba-test-libs-4.2.10-7.el7_2.s390.rpm
samba-test-libs-4.2.10-7.el7_2.s390x.rpm
samba-winbind-krb5-locator-4.2.10-7.el7_2.s390x.rpm

x86_64:
libsmbclient-devel-4.2.10-7.el7_2.i686.rpm
libsmbclient-devel-4.2.10-7.el7_2.x86_64.rpm
libwbclient-devel-4.2.10-7.el7_2.i686.rpm
libwbclient-devel-4.2.10-7.el7_2.x86_64.rpm
samba-dc-4.2.10-7.el7_2.x86_64.rpm
samba-dc-libs-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm
samba-devel-4.2.10-7.el7_2.i686.rpm
samba-devel-4.2.10-7.el7_2.x86_64.rpm
samba-test-4.2.10-7.el7_2.x86_64.rpm
samba-test-devel-4.2.10-7.el7_2.x86_64.rpm
samba-test-libs-4.2.10-7.el7_2.i686.rpm
samba-test-libs-4.2.10-7.el7_2.x86_64.rpm
samba-vfs-glusterfs-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-krb5-locator-4.2.10-7.el7_2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
samba-4.2.10-7.el7_2.src.rpm

noarch:
samba-common-4.2.10-7.el7_2.noarch.rpm

x86_64:
libsmbclient-4.2.10-7.el7_2.i686.rpm
libsmbclient-4.2.10-7.el7_2.x86_64.rpm
libwbclient-4.2.10-7.el7_2.i686.rpm
libwbclient-4.2.10-7.el7_2.x86_64.rpm
samba-4.2.10-7.el7_2.x86_64.rpm
samba-client-4.2.10-7.el7_2.x86_64.rpm
samba-client-libs-4.2.10-7.el7_2.i686.rpm
samba-client-libs-4.2.10-7.el7_2.x86_64.rpm
samba-common-libs-4.2.10-7.el7_2.x86_64.rpm
samba-common-tools-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm
samba-libs-4.2.10-7.el7_2.i686.rpm
samba-libs-4.2.10-7.el7_2.x86_64.rpm
samba-python-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-clients-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-modules-4.2.10-7.el7_2.i686.rpm
samba-winbind-modules-4.2.10-7.el7_2.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

noarch:
samba-pidl-4.2.10-7.el7_2.noarch.rpm

x86_64:
libsmbclient-devel-4.2.10-7.el7_2.i686.rpm
libsmbclient-devel-4.2.10-7.el7_2.x86_64.rpm
libwbclient-devel-4.2.10-7.el7_2.i686.rpm
libwbclient-devel-4.2.10-7.el7_2.x86_64.rpm
samba-dc-4.2.10-7.el7_2.x86_64.rpm
samba-dc-libs-4.2.10-7.el7_2.x86_64.rpm
samba-debuginfo-4.2.10-7.el7_2.i686.rpm
samba-debuginfo-4.2.10-7.el7_2.x86_64.rpm
samba-devel-4.2.10-7.el7_2.i686.rpm
samba-devel-4.2.10-7.el7_2.x86_64.rpm
samba-test-4.2.10-7.el7_2.x86_64.rpm
samba-test-devel-4.2.10-7.el7_2.x86_64.rpm
samba-test-libs-4.2.10-7.el7_2.i686.rpm
samba-test-libs-4.2.10-7.el7_2.x86_64.rpm
samba-vfs-glusterfs-4.2.10-7.el7_2.x86_64.rpm
samba-winbind-krb5-locator-4.2.10-7.el7_2.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2016-2119
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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