Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 461
Alerts This Week
Warning Icon 1 461

Red Hat: RHSA-2014-0330-01 Moderate Samba Security Issue

red hat
Calendar Grey March 25, 2014
Scroller Redhat
Update for Samba and samba3x to fix average security vulnerabilities in Red Hat Enterprise Linux is available. Protect your system today.
Updated samba3x and samba packages that fix two security issues are now available for Red Hat Enterprise Linux 5 and 6 respectively

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/site/articles/11258

Summary

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.
It was found that certain Samba configurations did not enforce the password lockout mechanism. A remote attacker could use this flaw to perform password guessing attacks on Samba user accounts. Note: this flaw only affected Samba when deployed as a Primary Domain Controller. (CVE-2013-4496)
A flaw was found in the way the pam_winbind module handled configurations that specified a non-existent group as required. An authenticated user could possibly use this flaw to gain access to a service using pam_winbind in its PAM configuration when group restriction was intended for access to the service. (CVE-2012-6150)
Red Hat would like to thank the Samba project for reporting CVE-2013-4496 and Sam Richardson for reporting CVE-2012-6150. Upstream acknowledges Andrew Bartlett as the original reporter of CVE-2013-4496.
All users of Samba are advised to upgrade to these updated packages, which contain backported patches to correct these issues. After installing this update, the smb service will be restarted automatically.

Topics%20covered

Topics Covered

security advisory Red Hat access control samba moderate severity system update pam_winbind

References

https://access.redhat.com/security/cve/CVE-2012-6150 https://access.redhat.com/security/cve/CVE-2013-4496 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: samba3x-3.6.6-0.139.el5_10.i386.rpm samba3x-client-3.6.6-0.139.el5_10.i386.rpm samba3x-common-3.6.6-0.139.el5_10.i386.rpm samba3x-debuginfo-3.6.6-0.139.el5_10.i386.rpm samba3x-doc-3.6.6-0.139.el5_10.i386.rpm samba3x-domainjoin-gui-3.6.6-0.139.el5_10.i386.rpm samba3x-swat-3.6.6-0.139.el5_10.i386.rpm samba3x-winbind-3.6.6-0.139.el5_10.i386.rpm
x86_64: samba3x-3.6.6-0.139.el5_10.x86_64.rpm samba3x-client-3.6.6-0.139.el5_10.x86_64.rpm samba3x-common-3.6.6-0.139.el5_10.x86_64.rpm samba3x-debuginfo-3.6.6-0.139.el5_10.i386.rpm samba3x-debuginfo-3.6.6-0.139.el5_10.x86_64.rpm samba3x-doc-3.6.6-0.139.el5_10.x86_64.rpm samba3x-domainjoin-gui-3.6.6-0.139.el5_10.x86_64.rpm samba3x-swat-3.6.6-0.139.el5_10.x86_64.rpm samba3x-winbind-3.6.6-0.139.el5_10.i386.rpm samba3x-winbind-3.6.6-0.139.el5_10.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
i386: samba3x-debuginfo-3.6.6-0.139.el5_10.i386.rpm samba3x-winbind-devel-3.6.6-0.139.el5_10.i386.rpm
x86_64: samba3x-debuginfo-3.6.6-0.139.el5_10.i386.rpm samba3x-debuginfo-3.6.6-0.139.el5_10.x86_64.rpm samba3x-winbind-devel-3.6.6-0.139.el5_10.i386.rpm samba3x-winbind-devel-3.6.6-0.139.el5_10.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386:

Read the Full Advisory


Advisory ID: RHSA-2014:0330-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2014:0330.html
Issue date: 2014-03-25

Topic

Updated samba3x and samba packages that fix two security issues are nowavailable for Red Hat Enterprise Linux 5 and 6 respectively.The Red Hat Security Response Team has rated this update as having Moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat access control samba moderate severity system update pam_winbind

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

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

1036897 - CVE-2012-6150 samba: pam_winbind fails open when non-existent group specified to require_membership_of

1072792 - CVE-2013-4496 samba: Password lockout not enforced for SAMR password changes

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.