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Red Hat 6 RHSA-2017:0662-01 Moderate: Samba Security And Bug Fix

red hat
Calendar Grey March 21, 2017
Scroller Redhat
CentOS 7 undergoes a critical patch for the OpenSSL vulnerabilities flagged in CVE-2017-5754 and CVE-2017-5753.
An update for samba is now available for Red Hat Enterprise Linux 6

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory security issue red hat bug fix moderate threat samba update

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

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

Read the Full Advisory


Advisory ID: RHSA-2017:0662-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0662.html
Issue date: 2017-03-21

Topic

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue red hat bug fix moderate threat samba update

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

Bugs Fixed

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

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