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[RHSA-2017:0744-01] Moderate: samba4 security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Moderate: samba4 security and bug fix update

Advisory ID: RHSA-2017:0744-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0744.html

Issue date: 2017-03-21

CVE Names: CVE-2016-2125 CVE-2016-2126

=====================================================================

 

1. Summary:

 

An update for samba4 is now available for Red Hat Enterprise Linux 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.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

 

3. Description:

 

Samba is an open-source implementation of the Server Message Block (SMB) or

Common Internet File System (CIFS) protocol, which allows PC-compatible

machines to share files, printers, and other 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)

 

Additional Changes:

 

For detailed information on changes in this release, see the Red Hat

Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9

Technical Notes linked from the References section.

 

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

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

samba4-4.2.10-9.el6.src.rpm

 

i386:

samba4-4.2.10-9.el6.i686.rpm

samba4-client-4.2.10-9.el6.i686.rpm

samba4-common-4.2.10-9.el6.i686.rpm

samba4-dc-4.2.10-9.el6.i686.rpm

samba4-dc-libs-4.2.10-9.el6.i686.rpm

samba4-debuginfo-4.2.10-9.el6.i686.rpm

samba4-devel-4.2.10-9.el6.i686.rpm

samba4-libs-4.2.10-9.el6.i686.rpm

samba4-pidl-4.2.10-9.el6.i686.rpm

samba4-python-4.2.10-9.el6.i686.rpm

samba4-test-4.2.10-9.el6.i686.rpm

samba4-winbind-4.2.10-9.el6.i686.rpm

samba4-winbind-clients-4.2.10-9.el6.i686.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.i686.rpm

 

x86_64:

samba4-4.2.10-9.el6.x86_64.rpm

samba4-client-4.2.10-9.el6.x86_64.rpm

samba4-common-4.2.10-9.el6.x86_64.rpm

samba4-dc-4.2.10-9.el6.x86_64.rpm

samba4-dc-libs-4.2.10-9.el6.x86_64.rpm

samba4-debuginfo-4.2.10-9.el6.x86_64.rpm

samba4-devel-4.2.10-9.el6.x86_64.rpm

samba4-libs-4.2.10-9.el6.x86_64.rpm

samba4-pidl-4.2.10-9.el6.x86_64.rpm

samba4-python-4.2.10-9.el6.x86_64.rpm

samba4-test-4.2.10-9.el6.x86_64.rpm

samba4-winbind-4.2.10-9.el6.x86_64.rpm

samba4-winbind-clients-4.2.10-9.el6.x86_64.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

samba4-4.2.10-9.el6.src.rpm

 

x86_64:

samba4-4.2.10-9.el6.x86_64.rpm

samba4-client-4.2.10-9.el6.x86_64.rpm

samba4-common-4.2.10-9.el6.x86_64.rpm

samba4-dc-4.2.10-9.el6.x86_64.rpm

samba4-dc-libs-4.2.10-9.el6.x86_64.rpm

samba4-debuginfo-4.2.10-9.el6.x86_64.rpm

samba4-devel-4.2.10-9.el6.x86_64.rpm

samba4-libs-4.2.10-9.el6.x86_64.rpm

samba4-pidl-4.2.10-9.el6.x86_64.rpm

samba4-python-4.2.10-9.el6.x86_64.rpm

samba4-test-4.2.10-9.el6.x86_64.rpm

samba4-winbind-4.2.10-9.el6.x86_64.rpm

samba4-winbind-clients-4.2.10-9.el6.x86_64.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

samba4-4.2.10-9.el6.src.rpm

 

i386:

samba4-4.2.10-9.el6.i686.rpm

samba4-client-4.2.10-9.el6.i686.rpm

samba4-common-4.2.10-9.el6.i686.rpm

samba4-dc-4.2.10-9.el6.i686.rpm

samba4-dc-libs-4.2.10-9.el6.i686.rpm

samba4-debuginfo-4.2.10-9.el6.i686.rpm

samba4-devel-4.2.10-9.el6.i686.rpm

samba4-libs-4.2.10-9.el6.i686.rpm

samba4-pidl-4.2.10-9.el6.i686.rpm

samba4-python-4.2.10-9.el6.i686.rpm

samba4-test-4.2.10-9.el6.i686.rpm

samba4-winbind-4.2.10-9.el6.i686.rpm

samba4-winbind-clients-4.2.10-9.el6.i686.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.i686.rpm

 

ppc64:

samba4-4.2.10-9.el6.ppc64.rpm

samba4-client-4.2.10-9.el6.ppc64.rpm

samba4-common-4.2.10-9.el6.ppc64.rpm

samba4-dc-4.2.10-9.el6.ppc64.rpm

samba4-dc-libs-4.2.10-9.el6.ppc64.rpm

samba4-debuginfo-4.2.10-9.el6.ppc64.rpm

samba4-devel-4.2.10-9.el6.ppc64.rpm

samba4-libs-4.2.10-9.el6.ppc64.rpm

samba4-pidl-4.2.10-9.el6.ppc64.rpm

samba4-python-4.2.10-9.el6.ppc64.rpm

samba4-test-4.2.10-9.el6.ppc64.rpm

samba4-winbind-4.2.10-9.el6.ppc64.rpm

samba4-winbind-clients-4.2.10-9.el6.ppc64.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.ppc64.rpm

 

s390x:

samba4-4.2.10-9.el6.s390x.rpm

samba4-client-4.2.10-9.el6.s390x.rpm

samba4-common-4.2.10-9.el6.s390x.rpm

samba4-dc-4.2.10-9.el6.s390x.rpm

samba4-dc-libs-4.2.10-9.el6.s390x.rpm

samba4-debuginfo-4.2.10-9.el6.s390x.rpm

samba4-devel-4.2.10-9.el6.s390x.rpm

samba4-libs-4.2.10-9.el6.s390x.rpm

samba4-pidl-4.2.10-9.el6.s390x.rpm

samba4-python-4.2.10-9.el6.s390x.rpm

samba4-test-4.2.10-9.el6.s390x.rpm

samba4-winbind-4.2.10-9.el6.s390x.rpm

samba4-winbind-clients-4.2.10-9.el6.s390x.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.s390x.rpm

 

x86_64:

samba4-4.2.10-9.el6.x86_64.rpm

samba4-client-4.2.10-9.el6.x86_64.rpm

samba4-common-4.2.10-9.el6.x86_64.rpm

samba4-dc-4.2.10-9.el6.x86_64.rpm

samba4-dc-libs-4.2.10-9.el6.x86_64.rpm

samba4-debuginfo-4.2.10-9.el6.x86_64.rpm

samba4-devel-4.2.10-9.el6.x86_64.rpm

samba4-libs-4.2.10-9.el6.x86_64.rpm

samba4-pidl-4.2.10-9.el6.x86_64.rpm

samba4-python-4.2.10-9.el6.x86_64.rpm

samba4-test-4.2.10-9.el6.x86_64.rpm

samba4-winbind-4.2.10-9.el6.x86_64.rpm

samba4-winbind-clients-4.2.10-9.el6.x86_64.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

samba4-4.2.10-9.el6.src.rpm

 

i386:

samba4-4.2.10-9.el6.i686.rpm

samba4-client-4.2.10-9.el6.i686.rpm

samba4-common-4.2.10-9.el6.i686.rpm

samba4-dc-4.2.10-9.el6.i686.rpm

samba4-dc-libs-4.2.10-9.el6.i686.rpm

samba4-debuginfo-4.2.10-9.el6.i686.rpm

samba4-devel-4.2.10-9.el6.i686.rpm

samba4-libs-4.2.10-9.el6.i686.rpm

samba4-pidl-4.2.10-9.el6.i686.rpm

samba4-python-4.2.10-9.el6.i686.rpm

samba4-test-4.2.10-9.el6.i686.rpm

samba4-winbind-4.2.10-9.el6.i686.rpm

samba4-winbind-clients-4.2.10-9.el6.i686.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.i686.rpm

 

x86_64:

samba4-4.2.10-9.el6.x86_64.rpm

samba4-client-4.2.10-9.el6.x86_64.rpm

samba4-common-4.2.10-9.el6.x86_64.rpm

samba4-dc-4.2.10-9.el6.x86_64.rpm

samba4-dc-libs-4.2.10-9.el6.x86_64.rpm

samba4-debuginfo-4.2.10-9.el6.x86_64.rpm

samba4-devel-4.2.10-9.el6.x86_64.rpm

samba4-libs-4.2.10-9.el6.x86_64.rpm

samba4-pidl-4.2.10-9.el6.x86_64.rpm

samba4-python-4.2.10-9.el6.x86_64.rpm

samba4-test-4.2.10-9.el6.x86_64.rpm

samba4-winbind-4.2.10-9.el6.x86_64.rpm

samba4-winbind-clients-4.2.10-9.el6.x86_64.rpm

samba4-winbind-krb5-locator-4.2.10-9.el6.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/updates/classification/#moderate

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.9_Release_Notes/index.html

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.9_Technical_Notes/index.html

https://www.samba.org/samba/security/CVE-2016-2125.html

https://www.samba.org/samba/security/CVE-2016-2126.html

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2017 Red Hat, Inc.

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