Synopsis

Moderate: Red Hat Gluster Storage 3.2.0 samba security, bug fixes and enhancement update

Type/Severity

Security Advisory: Moderate

Topic

An update for samba is now available for Red Hat Gluster Storage 3.2 for RHEL 6.

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.

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.

The following packages have been upgraded to a later upstream version: samba (4.4.6). (BZ#1382291)

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)
  

Enhancement(s):

• The gluster vfs plugin now supports more than one volfile server. Samba tries to connect to the next server on the list if one of the gluster servers is not reachable. (BZ#1330081)
  
• This update provides stability and improvements in error handling and code maintainability in the shadow copy module. (BZ#1385663)

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.

Affected Products

• Red Hat Gluster Storage Server for On-premise 3 for RHEL 6 x86_64

Fixes

• BZ - 1292781 - (RHEL6) CTDB: SELinux: ctdb disablescript fails to execute because of SELinux avc's
• BZ - 1330081 - [RHEL6] [RFE] gluster vfs plugin should be able to make use of multiple volfile server feature of gfapi
• BZ - 1379592 - [RHEL6] Bring content into empty distgit branch
• BZ - 1382291 - [RHEL6] Rebase Samba to 4.4.6 for RHGS 3.2.0
• BZ - 1385663 - [RHEL6] Back port changes in shadow copy module for VSS support from upstream
• BZ - 1403114 - CVE-2016-2125 samba: Unconditional privilege delegation to Kerberos servers in trusted realms
• BZ - 1403115 - CVE-2016-2126 samba: Flaws in Kerberos PAC validation can trigger privilege elevation
• BZ - 1406287 - [RHEL6] [SAMBA-CTDB]IP failover with ctdb leads to smbd crash

CVEs

• CVE-2016-2125
• CVE-2016-2126

References

• https://access.redhat.com/security/updates/classification/#moderate

Red Hat Gluster Storage Server for On-premise 3 for RHEL 6

SRPM
samba-4.4.6-4.el6rhs.src.rpm	SHA-256: c978d8ec76a987f1497015ed1882ade3f45baf7f22b54881141f6fb8a0bbf65e
x86_64
ctdb-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 57847c35e4f875d38cec3dee73aae1953b35569e08999e16e6243fa43e42fc9a
ctdb-tests-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 9b349abf1599f0a936b99d3e96b1d2ab35d73b63037a664d91dce993ea9319a9
libsmbclient-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: f404bf03af3451df30c58a12de71f4cc6458c2bf55aefeb777557a076369a7a9
libsmbclient-devel-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: f7ba95ad62bbddae2fe33eb86572a7c4115379ad70b854d2ce267c3734e40cc2
libwbclient-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: b8e65f9e5f96863313ff63a348b1b2f2a8709f813dc83cbfb2cd8640df6f4cfb
libwbclient-devel-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: f5161e3da934e0e529cf69c74000f037476093fcf1a0939d6a416a06a7b7f45d
samba-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 779102e3c237b1cc76b4cb05c52fcbe77240ce34c226dc015a09839f22c9b996
samba-client-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 7b4ed09fc94be900aea01bf9100816507b0974df7d84afb624d0240c626af79d
samba-client-libs-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 485665d8ee2b0015a0979815a68972babcd64a2482ae6207a8de83ae7eb6a492
samba-common-4.4.6-4.el6rhs.noarch.rpm	SHA-256: 8deb5dbba16678a18e6cd35a5265dd41791ac5d506883b9b985422863ae49391
samba-common-libs-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: f37629b6da8afcfadc9bedc022f81c9120494d2ee1d43326a15c4ea4a9cf3c9c
samba-common-tools-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 1616a232c05b122842576f34ad90abf32dab96fc59edea84179193603ec93aef
samba-dc-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: b21aee6e8a831036f0b79853346eb3bfab1202779deb8b90ea2689e3f1559f5c
samba-dc-libs-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 88a66b5e13ed507031c3c34e97042f23aa746659fe83587ce5ba1c6ff44ed8e2
samba-debuginfo-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: ba011a073a5eb7144852cbcd9dc5e8a58cf39efe50904d2a794ed7a4f05fee5d
samba-devel-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: aa898516c6116550a51d6df39f97519712c4aa78e4a6f31c5c4c24bbcd069c27
samba-krb5-printing-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 376c08c4e71dc801e032db7b0fc0c6f699dbb3f33520e7a5ee571fd5b807d7e4
samba-libs-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 575ec823f9a5a3e24005040da81f0cc017f2aff0599b86eb704f737aaec6b3d9
samba-pidl-4.4.6-4.el6rhs.noarch.rpm	SHA-256: 4bd4ca631066354855892ab037fc268c555cea88efb98917a35c72f5e3d96a57
samba-python-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 26ef91aed55b6f4c3b9f8d7f413dbdf9e45a3d307a12b3f381fe15fcc7b2b55a
samba-test-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 6f8e39a9c7fbfdae0b65e871db1c52c1bb9d1c4d2ce5b971c977bc64b1e3b75e
samba-test-libs-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: f5da831ca111eeb4b22e520c9c258883533947e7c136fceff68892ebeca0fdac
samba-vfs-glusterfs-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 0420fd9b1393f37496271682de4349353c2016b9f61c16a42ed850b3ed27d5d5
samba-winbind-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 718dd02aae62697bb191297ded1e1d3a975cb925ae3eea70947259fb608271ca
samba-winbind-clients-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 7e9dff845625dd764d558ba7fca4bf7eb1baf21360399a1fed7af0c5d4a211ad
samba-winbind-krb5-locator-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: 92d81533c481c0fbad64fd36b22d77f582018bcd7dfe8bc189e2e9a2cd0481f8
samba-winbind-modules-4.4.6-4.el6rhs.x86_64.rpm	SHA-256: d948b33c8a67b6ce5026c772f9feb2c43bc5b9ab8fdea651ff6159e273ddb96e