[RHSA-2017:0662-01] Moderate: samba security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Moderate: samba security and bug fix update

Advisory ID: RHSA-2017:0662-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0662.html

Issue date: 2017-03-21

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

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1. Summary:

 

An update for samba 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 Desktop Optional (v. 6) - i386, x86_64

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

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

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

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

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

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

 

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/):

 

1327697 - schannel connections fail to the DC because netlogon credentials are not updated correctly

1372611 - NetAPP SMB servers don't negotiate NTLMSSP_SIGN for SESSION KEY setup

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

1413672 - BADLOCK REGRESSION: Member fails to authenticate against nt4_dc, if the member changes it secret

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

samba-3.6.23-41.el6.src.rpm

 

i386:

libsmbclient-3.6.23-41.el6.i686.rpm

samba-client-3.6.23-41.el6.i686.rpm

samba-common-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-winbind-3.6.23-41.el6.i686.rpm

samba-winbind-clients-3.6.23-41.el6.i686.rpm

 

x86_64:

libsmbclient-3.6.23-41.el6.i686.rpm

libsmbclient-3.6.23-41.el6.x86_64.rpm

samba-client-3.6.23-41.el6.x86_64.rpm

samba-common-3.6.23-41.el6.i686.rpm

samba-common-3.6.23-41.el6.x86_64.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.x86_64.rpm

samba-winbind-3.6.23-41.el6.x86_64.rpm

samba-winbind-clients-3.6.23-41.el6.i686.rpm

samba-winbind-clients-3.6.23-41.el6.x86_64.rpm

 

Red Hat Enterprise Linux Desktop Optional (v. 6):

 

i386:

libsmbclient-devel-3.6.23-41.el6.i686.rpm

samba-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-doc-3.6.23-41.el6.i686.rpm

samba-domainjoin-gui-3.6.23-41.el6.i686.rpm

samba-swat-3.6.23-41.el6.i686.rpm

samba-winbind-devel-3.6.23-41.el6.i686.rpm

samba-winbind-krb5-locator-3.6.23-41.el6.i686.rpm

 

x86_64:

libsmbclient-devel-3.6.23-41.el6.i686.rpm

libsmbclient-devel-3.6.23-41.el6.x86_64.rpm

samba-3.6.23-41.el6.x86_64.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.x86_64.rpm

samba-doc-3.6.23-41.el6.x86_64.rpm

samba-domainjoin-gui-3.6.23-41.el6.x86_64.rpm

samba-glusterfs-3.6.23-41.el6.x86_64.rpm

samba-swat-3.6.23-41.el6.x86_64.rpm

samba-winbind-devel-3.6.23-41.el6.i686.rpm

samba-winbind-devel-3.6.23-41.el6.x86_64.rpm

samba-winbind-krb5-locator-3.6.23-41.el6.x86_64.rpm

 

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

 

Source:

samba-3.6.23-41.el6.src.rpm

 

x86_64:

samba-client-3.6.23-41.el6.x86_64.rpm

samba-common-3.6.23-41.el6.i686.rpm

samba-common-3.6.23-41.el6.x86_64.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.x86_64.rpm

samba-winbind-3.6.23-41.el6.x86_64.rpm

samba-winbind-clients-3.6.23-41.el6.i686.rpm

samba-winbind-clients-3.6.23-41.el6.x86_64.rpm

 

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

 

x86_64:

libsmbclient-3.6.23-41.el6.i686.rpm

libsmbclient-3.6.23-41.el6.x86_64.rpm

libsmbclient-devel-3.6.23-41.el6.i686.rpm

libsmbclient-devel-3.6.23-41.el6.x86_64.rpm

samba-3.6.23-41.el6.x86_64.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.x86_64.rpm

samba-doc-3.6.23-41.el6.x86_64.rpm

samba-domainjoin-gui-3.6.23-41.el6.x86_64.rpm

samba-glusterfs-3.6.23-41.el6.x86_64.rpm

samba-swat-3.6.23-41.el6.x86_64.rpm

samba-winbind-devel-3.6.23-41.el6.i686.rpm

samba-winbind-devel-3.6.23-41.el6.x86_64.rpm

samba-winbind-krb5-locator-3.6.23-41.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

samba-3.6.23-41.el6.src.rpm

 

i386:

libsmbclient-3.6.23-41.el6.i686.rpm

samba-3.6.23-41.el6.i686.rpm

samba-client-3.6.23-41.el6.i686.rpm

samba-common-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-winbind-3.6.23-41.el6.i686.rpm

samba-winbind-clients-3.6.23-41.el6.i686.rpm

 

ppc64:

libsmbclient-3.6.23-41.el6.ppc.rpm

libsmbclient-3.6.23-41.el6.ppc64.rpm

samba-3.6.23-41.el6.ppc64.rpm

samba-client-3.6.23-41.el6.ppc64.rpm

samba-common-3.6.23-41.el6.ppc.rpm

samba-common-3.6.23-41.el6.ppc64.rpm

samba-debuginfo-3.6.23-41.el6.ppc.rpm

samba-debuginfo-3.6.23-41.el6.ppc64.rpm

samba-winbind-3.6.23-41.el6.ppc64.rpm

samba-winbind-clients-3.6.23-41.el6.ppc.rpm

samba-winbind-clients-3.6.23-41.el6.ppc64.rpm

 

s390x:

libsmbclient-3.6.23-41.el6.s390.rpm

libsmbclient-3.6.23-41.el6.s390x.rpm

samba-3.6.23-41.el6.s390x.rpm

samba-client-3.6.23-41.el6.s390x.rpm

samba-common-3.6.23-41.el6.s390.rpm

samba-common-3.6.23-41.el6.s390x.rpm

samba-debuginfo-3.6.23-41.el6.s390.rpm

samba-debuginfo-3.6.23-41.el6.s390x.rpm

samba-winbind-3.6.23-41.el6.s390x.rpm

samba-winbind-clients-3.6.23-41.el6.s390.rpm

samba-winbind-clients-3.6.23-41.el6.s390x.rpm

 

x86_64:

libsmbclient-3.6.23-41.el6.i686.rpm

libsmbclient-3.6.23-41.el6.x86_64.rpm

samba-3.6.23-41.el6.x86_64.rpm

samba-client-3.6.23-41.el6.x86_64.rpm

samba-common-3.6.23-41.el6.i686.rpm

samba-common-3.6.23-41.el6.x86_64.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.x86_64.rpm

samba-winbind-3.6.23-41.el6.x86_64.rpm

samba-winbind-clients-3.6.23-41.el6.i686.rpm

samba-winbind-clients-3.6.23-41.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 6):

 

i386:

libsmbclient-devel-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-doc-3.6.23-41.el6.i686.rpm

samba-domainjoin-gui-3.6.23-41.el6.i686.rpm

samba-swat-3.6.23-41.el6.i686.rpm

samba-winbind-devel-3.6.23-41.el6.i686.rpm

samba-winbind-krb5-locator-3.6.23-41.el6.i686.rpm

 

ppc64:

libsmbclient-devel-3.6.23-41.el6.ppc.rpm

libsmbclient-devel-3.6.23-41.el6.ppc64.rpm

samba-debuginfo-3.6.23-41.el6.ppc.rpm

samba-debuginfo-3.6.23-41.el6.ppc64.rpm

samba-doc-3.6.23-41.el6.ppc64.rpm

samba-domainjoin-gui-3.6.23-41.el6.ppc64.rpm

samba-swat-3.6.23-41.el6.ppc64.rpm

samba-winbind-devel-3.6.23-41.el6.ppc.rpm

samba-winbind-devel-3.6.23-41.el6.ppc64.rpm

samba-winbind-krb5-locator-3.6.23-41.el6.ppc64.rpm

 

s390x:

libsmbclient-devel-3.6.23-41.el6.s390.rpm

libsmbclient-devel-3.6.23-41.el6.s390x.rpm

samba-debuginfo-3.6.23-41.el6.s390.rpm

samba-debuginfo-3.6.23-41.el6.s390x.rpm

samba-doc-3.6.23-41.el6.s390x.rpm

samba-domainjoin-gui-3.6.23-41.el6.s390x.rpm

samba-swat-3.6.23-41.el6.s390x.rpm

samba-winbind-devel-3.6.23-41.el6.s390.rpm

samba-winbind-devel-3.6.23-41.el6.s390x.rpm

samba-winbind-krb5-locator-3.6.23-41.el6.s390x.rpm

 

x86_64:

libsmbclient-devel-3.6.23-41.el6.i686.rpm

libsmbclient-devel-3.6.23-41.el6.x86_64.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.x86_64.rpm

samba-doc-3.6.23-41.el6.x86_64.rpm

samba-domainjoin-gui-3.6.23-41.el6.x86_64.rpm

samba-glusterfs-3.6.23-41.el6.x86_64.rpm

samba-swat-3.6.23-41.el6.x86_64.rpm

samba-winbind-devel-3.6.23-41.el6.i686.rpm

samba-winbind-devel-3.6.23-41.el6.x86_64.rpm

samba-winbind-krb5-locator-3.6.23-41.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

samba-3.6.23-41.el6.src.rpm

 

i386:

libsmbclient-3.6.23-41.el6.i686.rpm

samba-3.6.23-41.el6.i686.rpm

samba-client-3.6.23-41.el6.i686.rpm

samba-common-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-winbind-3.6.23-41.el6.i686.rpm

samba-winbind-clients-3.6.23-41.el6.i686.rpm

 

x86_64:

libsmbclient-3.6.23-41.el6.i686.rpm

libsmbclient-3.6.23-41.el6.x86_64.rpm

samba-3.6.23-41.el6.x86_64.rpm

samba-client-3.6.23-41.el6.x86_64.rpm

samba-common-3.6.23-41.el6.i686.rpm

samba-common-3.6.23-41.el6.x86_64.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.x86_64.rpm

samba-winbind-3.6.23-41.el6.x86_64.rpm

samba-winbind-clients-3.6.23-41.el6.i686.rpm

samba-winbind-clients-3.6.23-41.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 6):

 

i386:

libsmbclient-devel-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-doc-3.6.23-41.el6.i686.rpm

samba-domainjoin-gui-3.6.23-41.el6.i686.rpm

samba-swat-3.6.23-41.el6.i686.rpm

samba-winbind-devel-3.6.23-41.el6.i686.rpm

samba-winbind-krb5-locator-3.6.23-41.el6.i686.rpm

 

x86_64:

libsmbclient-devel-3.6.23-41.el6.i686.rpm

libsmbclient-devel-3.6.23-41.el6.x86_64.rpm

samba-debuginfo-3.6.23-41.el6.i686.rpm

samba-debuginfo-3.6.23-41.el6.x86_64.rpm

samba-doc-3.6.23-41.el6.x86_64.rpm

samba-domainjoin-gui-3.6.23-41.el6.x86_64.rpm

samba-glusterfs-3.6.23-41.el6.x86_64.rpm

samba-swat-3.6.23-41.el6.x86_64.rpm

samba-winbind-devel-3.6.23-41.el6.i686.rpm

samba-winbind-devel-3.6.23-41.el6.x86_64.rpm

samba-winbind-krb5-locator-3.6.23-41.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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