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

Synopsis: Moderate: samba security and bug fix update
Advisory ID: RHSA-2017:1265-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1265
Issue date: 2017-05-22
CVE Names: CVE-2016-2125 CVE-2016-2126 CVE-2017-2619
=====================================================================

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) – aarch64, noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) – aarch64, 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):

* It was found that Samba always requested forwardable tickets when using
Kerberos authentication. A service to which Samba authenticated using
Kerberos could subsequently use the ticket to impersonate Samba to other
services or domain users. (CVE-2016-2125)

* A flaw was found in the way Samba handled PAC (Privilege Attribute
Certificate) checksums. A remote, authenticated attacker could use this
flaw to crash the winbindd process. (CVE-2016-2126)

* A race condition was found in samba server. A malicious samba client
could use this flaw to access files and directories, in areas of the server
file system not exported under the share definitions. (CVE-2017-2619)

Red Hat would like to thank the Samba project for reporting CVE-2017-2619.
Upstream acknowledges Jann Horn (Google) as the original reporter of
CVE-2017-2619.

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/):

1403114 – CVE-2016-2125 samba: Unconditional privilege delegation to Kerberos servers in trusted realms
1403115 – CVE-2016-2126 samba: Flaws in Kerberos PAC validation can trigger privilege elevation
1429472 – CVE-2017-2619 samba: symlink race permits opening files outside share directory

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
samba-4.4.4-13.el7_3.src.rpm

noarch:
samba-common-4.4.4-13.el7_3.noarch.rpm

x86_64:
libsmbclient-4.4.4-13.el7_3.i686.rpm
libsmbclient-4.4.4-13.el7_3.x86_64.rpm
libwbclient-4.4.4-13.el7_3.i686.rpm
libwbclient-4.4.4-13.el7_3.x86_64.rpm
samba-client-4.4.4-13.el7_3.x86_64.rpm
samba-client-libs-4.4.4-13.el7_3.i686.rpm
samba-client-libs-4.4.4-13.el7_3.x86_64.rpm
samba-common-libs-4.4.4-13.el7_3.x86_64.rpm
samba-common-tools-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.i686.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm
samba-krb5-printing-4.4.4-13.el7_3.x86_64.rpm
samba-libs-4.4.4-13.el7_3.i686.rpm
samba-libs-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-clients-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-modules-4.4.4-13.el7_3.i686.rpm
samba-winbind-modules-4.4.4-13.el7_3.x86_64.rpm

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

noarch:
samba-pidl-4.4.4-13.el7_3.noarch.rpm

x86_64:
libsmbclient-devel-4.4.4-13.el7_3.i686.rpm
libsmbclient-devel-4.4.4-13.el7_3.x86_64.rpm
libwbclient-devel-4.4.4-13.el7_3.i686.rpm
libwbclient-devel-4.4.4-13.el7_3.x86_64.rpm
samba-4.4.4-13.el7_3.x86_64.rpm
samba-dc-4.4.4-13.el7_3.x86_64.rpm
samba-dc-libs-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.i686.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm
samba-devel-4.4.4-13.el7_3.i686.rpm
samba-devel-4.4.4-13.el7_3.x86_64.rpm
samba-python-4.4.4-13.el7_3.x86_64.rpm
samba-test-4.4.4-13.el7_3.x86_64.rpm
samba-test-libs-4.4.4-13.el7_3.i686.rpm
samba-test-libs-4.4.4-13.el7_3.x86_64.rpm
samba-vfs-glusterfs-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-krb5-locator-4.4.4-13.el7_3.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
samba-4.4.4-13.el7_3.src.rpm

noarch:
samba-common-4.4.4-13.el7_3.noarch.rpm

x86_64:
libsmbclient-4.4.4-13.el7_3.i686.rpm
libsmbclient-4.4.4-13.el7_3.x86_64.rpm
libwbclient-4.4.4-13.el7_3.i686.rpm
libwbclient-4.4.4-13.el7_3.x86_64.rpm
samba-client-4.4.4-13.el7_3.x86_64.rpm
samba-client-libs-4.4.4-13.el7_3.i686.rpm
samba-client-libs-4.4.4-13.el7_3.x86_64.rpm
samba-common-libs-4.4.4-13.el7_3.x86_64.rpm
samba-common-tools-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.i686.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm
samba-libs-4.4.4-13.el7_3.i686.rpm
samba-libs-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-clients-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-modules-4.4.4-13.el7_3.i686.rpm
samba-winbind-modules-4.4.4-13.el7_3.x86_64.rpm

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

noarch:
samba-pidl-4.4.4-13.el7_3.noarch.rpm

x86_64:
libsmbclient-devel-4.4.4-13.el7_3.i686.rpm
libsmbclient-devel-4.4.4-13.el7_3.x86_64.rpm
libwbclient-devel-4.4.4-13.el7_3.i686.rpm
libwbclient-devel-4.4.4-13.el7_3.x86_64.rpm
samba-4.4.4-13.el7_3.x86_64.rpm
samba-dc-4.4.4-13.el7_3.x86_64.rpm
samba-dc-libs-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.i686.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm
samba-devel-4.4.4-13.el7_3.i686.rpm
samba-devel-4.4.4-13.el7_3.x86_64.rpm
samba-krb5-printing-4.4.4-13.el7_3.x86_64.rpm
samba-python-4.4.4-13.el7_3.x86_64.rpm
samba-test-4.4.4-13.el7_3.x86_64.rpm
samba-test-libs-4.4.4-13.el7_3.i686.rpm
samba-test-libs-4.4.4-13.el7_3.x86_64.rpm
samba-vfs-glusterfs-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-krb5-locator-4.4.4-13.el7_3.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
samba-4.4.4-13.el7_3.src.rpm

aarch64:
libsmbclient-4.4.4-13.el7_3.aarch64.rpm
libwbclient-4.4.4-13.el7_3.aarch64.rpm
samba-4.4.4-13.el7_3.aarch64.rpm
samba-client-4.4.4-13.el7_3.aarch64.rpm
samba-client-libs-4.4.4-13.el7_3.aarch64.rpm
samba-common-libs-4.4.4-13.el7_3.aarch64.rpm
samba-common-tools-4.4.4-13.el7_3.aarch64.rpm
samba-debuginfo-4.4.4-13.el7_3.aarch64.rpm
samba-krb5-printing-4.4.4-13.el7_3.aarch64.rpm
samba-libs-4.4.4-13.el7_3.aarch64.rpm
samba-python-4.4.4-13.el7_3.aarch64.rpm
samba-winbind-4.4.4-13.el7_3.aarch64.rpm
samba-winbind-clients-4.4.4-13.el7_3.aarch64.rpm
samba-winbind-modules-4.4.4-13.el7_3.aarch64.rpm

noarch:
samba-common-4.4.4-13.el7_3.noarch.rpm

ppc64:
libsmbclient-4.4.4-13.el7_3.ppc.rpm
libsmbclient-4.4.4-13.el7_3.ppc64.rpm
libwbclient-4.4.4-13.el7_3.ppc.rpm
libwbclient-4.4.4-13.el7_3.ppc64.rpm
samba-4.4.4-13.el7_3.ppc64.rpm
samba-client-4.4.4-13.el7_3.ppc64.rpm
samba-client-libs-4.4.4-13.el7_3.ppc.rpm
samba-client-libs-4.4.4-13.el7_3.ppc64.rpm
samba-common-libs-4.4.4-13.el7_3.ppc64.rpm
samba-common-tools-4.4.4-13.el7_3.ppc64.rpm
samba-debuginfo-4.4.4-13.el7_3.ppc.rpm
samba-debuginfo-4.4.4-13.el7_3.ppc64.rpm
samba-krb5-printing-4.4.4-13.el7_3.ppc64.rpm
samba-libs-4.4.4-13.el7_3.ppc.rpm
samba-libs-4.4.4-13.el7_3.ppc64.rpm
samba-winbind-4.4.4-13.el7_3.ppc64.rpm
samba-winbind-clients-4.4.4-13.el7_3.ppc64.rpm
samba-winbind-modules-4.4.4-13.el7_3.ppc.rpm
samba-winbind-modules-4.4.4-13.el7_3.ppc64.rpm

ppc64le:
libsmbclient-4.4.4-13.el7_3.ppc64le.rpm
libwbclient-4.4.4-13.el7_3.ppc64le.rpm
samba-4.4.4-13.el7_3.ppc64le.rpm
samba-client-4.4.4-13.el7_3.ppc64le.rpm
samba-client-libs-4.4.4-13.el7_3.ppc64le.rpm
samba-common-libs-4.4.4-13.el7_3.ppc64le.rpm
samba-common-tools-4.4.4-13.el7_3.ppc64le.rpm
samba-debuginfo-4.4.4-13.el7_3.ppc64le.rpm
samba-krb5-printing-4.4.4-13.el7_3.ppc64le.rpm
samba-libs-4.4.4-13.el7_3.ppc64le.rpm
samba-winbind-4.4.4-13.el7_3.ppc64le.rpm
samba-winbind-clients-4.4.4-13.el7_3.ppc64le.rpm
samba-winbind-modules-4.4.4-13.el7_3.ppc64le.rpm

s390x:
libsmbclient-4.4.4-13.el7_3.s390.rpm
libsmbclient-4.4.4-13.el7_3.s390x.rpm
libwbclient-4.4.4-13.el7_3.s390.rpm
libwbclient-4.4.4-13.el7_3.s390x.rpm
samba-4.4.4-13.el7_3.s390x.rpm
samba-client-4.4.4-13.el7_3.s390x.rpm
samba-client-libs-4.4.4-13.el7_3.s390.rpm
samba-client-libs-4.4.4-13.el7_3.s390x.rpm
samba-common-libs-4.4.4-13.el7_3.s390x.rpm
samba-common-tools-4.4.4-13.el7_3.s390x.rpm
samba-debuginfo-4.4.4-13.el7_3.s390.rpm
samba-debuginfo-4.4.4-13.el7_3.s390x.rpm
samba-krb5-printing-4.4.4-13.el7_3.s390x.rpm
samba-libs-4.4.4-13.el7_3.s390.rpm
samba-libs-4.4.4-13.el7_3.s390x.rpm
samba-winbind-4.4.4-13.el7_3.s390x.rpm
samba-winbind-clients-4.4.4-13.el7_3.s390x.rpm
samba-winbind-modules-4.4.4-13.el7_3.s390.rpm
samba-winbind-modules-4.4.4-13.el7_3.s390x.rpm

x86_64:
libsmbclient-4.4.4-13.el7_3.i686.rpm
libsmbclient-4.4.4-13.el7_3.x86_64.rpm
libwbclient-4.4.4-13.el7_3.i686.rpm
libwbclient-4.4.4-13.el7_3.x86_64.rpm
samba-4.4.4-13.el7_3.x86_64.rpm
samba-client-4.4.4-13.el7_3.x86_64.rpm
samba-client-libs-4.4.4-13.el7_3.i686.rpm
samba-client-libs-4.4.4-13.el7_3.x86_64.rpm
samba-common-libs-4.4.4-13.el7_3.x86_64.rpm
samba-common-tools-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.i686.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm
samba-krb5-printing-4.4.4-13.el7_3.x86_64.rpm
samba-libs-4.4.4-13.el7_3.i686.rpm
samba-libs-4.4.4-13.el7_3.x86_64.rpm
samba-python-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-clients-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-modules-4.4.4-13.el7_3.i686.rpm
samba-winbind-modules-4.4.4-13.el7_3.x86_64.rpm

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

x86_64:
ctdb-4.4.4-13.el7_3.x86_64.rpm
ctdb-tests-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm

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

aarch64:
libsmbclient-devel-4.4.4-13.el7_3.aarch64.rpm
libwbclient-devel-4.4.4-13.el7_3.aarch64.rpm
samba-dc-4.4.4-13.el7_3.aarch64.rpm
samba-dc-libs-4.4.4-13.el7_3.aarch64.rpm
samba-debuginfo-4.4.4-13.el7_3.aarch64.rpm
samba-devel-4.4.4-13.el7_3.aarch64.rpm
samba-test-4.4.4-13.el7_3.aarch64.rpm
samba-test-libs-4.4.4-13.el7_3.aarch64.rpm
samba-winbind-krb5-locator-4.4.4-13.el7_3.aarch64.rpm

noarch:
samba-pidl-4.4.4-13.el7_3.noarch.rpm

ppc64:
libsmbclient-devel-4.4.4-13.el7_3.ppc.rpm
libsmbclient-devel-4.4.4-13.el7_3.ppc64.rpm
libwbclient-devel-4.4.4-13.el7_3.ppc.rpm
libwbclient-devel-4.4.4-13.el7_3.ppc64.rpm
samba-dc-4.4.4-13.el7_3.ppc64.rpm
samba-dc-libs-4.4.4-13.el7_3.ppc64.rpm
samba-debuginfo-4.4.4-13.el7_3.ppc.rpm
samba-debuginfo-4.4.4-13.el7_3.ppc64.rpm
samba-devel-4.4.4-13.el7_3.ppc.rpm
samba-devel-4.4.4-13.el7_3.ppc64.rpm
samba-python-4.4.4-13.el7_3.ppc64.rpm
samba-test-4.4.4-13.el7_3.ppc64.rpm
samba-test-libs-4.4.4-13.el7_3.ppc.rpm
samba-test-libs-4.4.4-13.el7_3.ppc64.rpm
samba-winbind-krb5-locator-4.4.4-13.el7_3.ppc64.rpm

ppc64le:
libsmbclient-devel-4.4.4-13.el7_3.ppc64le.rpm
libwbclient-devel-4.4.4-13.el7_3.ppc64le.rpm
samba-dc-4.4.4-13.el7_3.ppc64le.rpm
samba-dc-libs-4.4.4-13.el7_3.ppc64le.rpm
samba-debuginfo-4.4.4-13.el7_3.ppc64le.rpm
samba-devel-4.4.4-13.el7_3.ppc64le.rpm
samba-python-4.4.4-13.el7_3.ppc64le.rpm
samba-test-4.4.4-13.el7_3.ppc64le.rpm
samba-test-libs-4.4.4-13.el7_3.ppc64le.rpm
samba-winbind-krb5-locator-4.4.4-13.el7_3.ppc64le.rpm

s390x:
libsmbclient-devel-4.4.4-13.el7_3.s390.rpm
libsmbclient-devel-4.4.4-13.el7_3.s390x.rpm
libwbclient-devel-4.4.4-13.el7_3.s390.rpm
libwbclient-devel-4.4.4-13.el7_3.s390x.rpm
samba-dc-4.4.4-13.el7_3.s390x.rpm
samba-dc-libs-4.4.4-13.el7_3.s390x.rpm
samba-debuginfo-4.4.4-13.el7_3.s390.rpm
samba-debuginfo-4.4.4-13.el7_3.s390x.rpm
samba-devel-4.4.4-13.el7_3.s390.rpm
samba-devel-4.4.4-13.el7_3.s390x.rpm
samba-python-4.4.4-13.el7_3.s390x.rpm
samba-test-4.4.4-13.el7_3.s390x.rpm
samba-test-libs-4.4.4-13.el7_3.s390.rpm
samba-test-libs-4.4.4-13.el7_3.s390x.rpm
samba-winbind-krb5-locator-4.4.4-13.el7_3.s390x.rpm

x86_64:
libsmbclient-devel-4.4.4-13.el7_3.i686.rpm
libsmbclient-devel-4.4.4-13.el7_3.x86_64.rpm
libwbclient-devel-4.4.4-13.el7_3.i686.rpm
libwbclient-devel-4.4.4-13.el7_3.x86_64.rpm
samba-dc-4.4.4-13.el7_3.x86_64.rpm
samba-dc-libs-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.i686.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm
samba-devel-4.4.4-13.el7_3.i686.rpm
samba-devel-4.4.4-13.el7_3.x86_64.rpm
samba-test-4.4.4-13.el7_3.x86_64.rpm
samba-test-libs-4.4.4-13.el7_3.i686.rpm
samba-test-libs-4.4.4-13.el7_3.x86_64.rpm
samba-vfs-glusterfs-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-krb5-locator-4.4.4-13.el7_3.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
samba-4.4.4-13.el7_3.src.rpm

noarch:
samba-common-4.4.4-13.el7_3.noarch.rpm

x86_64:
libsmbclient-4.4.4-13.el7_3.i686.rpm
libsmbclient-4.4.4-13.el7_3.x86_64.rpm
libwbclient-4.4.4-13.el7_3.i686.rpm
libwbclient-4.4.4-13.el7_3.x86_64.rpm
samba-4.4.4-13.el7_3.x86_64.rpm
samba-client-4.4.4-13.el7_3.x86_64.rpm
samba-client-libs-4.4.4-13.el7_3.i686.rpm
samba-client-libs-4.4.4-13.el7_3.x86_64.rpm
samba-common-libs-4.4.4-13.el7_3.x86_64.rpm
samba-common-tools-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.i686.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm
samba-krb5-printing-4.4.4-13.el7_3.x86_64.rpm
samba-libs-4.4.4-13.el7_3.i686.rpm
samba-libs-4.4.4-13.el7_3.x86_64.rpm
samba-python-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-clients-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-modules-4.4.4-13.el7_3.i686.rpm
samba-winbind-modules-4.4.4-13.el7_3.x86_64.rpm

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

noarch:
samba-pidl-4.4.4-13.el7_3.noarch.rpm

x86_64:
libsmbclient-devel-4.4.4-13.el7_3.i686.rpm
libsmbclient-devel-4.4.4-13.el7_3.x86_64.rpm
libwbclient-devel-4.4.4-13.el7_3.i686.rpm
libwbclient-devel-4.4.4-13.el7_3.x86_64.rpm
samba-dc-4.4.4-13.el7_3.x86_64.rpm
samba-dc-libs-4.4.4-13.el7_3.x86_64.rpm
samba-debuginfo-4.4.4-13.el7_3.i686.rpm
samba-debuginfo-4.4.4-13.el7_3.x86_64.rpm
samba-devel-4.4.4-13.el7_3.i686.rpm
samba-devel-4.4.4-13.el7_3.x86_64.rpm
samba-test-4.4.4-13.el7_3.x86_64.rpm
samba-test-libs-4.4.4-13.el7_3.i686.rpm
samba-test-libs-4.4.4-13.el7_3.x86_64.rpm
samba-vfs-glusterfs-4.4.4-13.el7_3.x86_64.rpm
samba-winbind-krb5-locator-4.4.4-13.el7_3.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-2016-2125
https://access.redhat.com/security/cve/CVE-2016-2126
https://access.redhat.com/security/cve/CVE-2017-2619
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 2017 Red Hat, Inc.
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Version: GnuPG v1

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=mb+I
—–END PGP SIGNATURE—–

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