[RHSA-2012:0313-03] Low: samba security, bug fix, and enhancement update

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Red Hat Security Advisory

 

Synopsis: Low: samba security, bug fix, and enhancement update

Advisory ID: RHSA-2012:0313-03

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0313.html

Issue date: 2012-02-21

CVE Names: CVE-2010-0926

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1. Summary:

 

Updated samba packages that fix one security issue, one bug, and add one

enhancement are now available for Red Hat Enterprise Linux 5.

 

The Red Hat Security Response Team has rated this update as having low

security impact. A Common Vulnerability Scoring System (CVSS) base score,

which gives a detailed severity rating, is available from the CVE link in

the References section.

 

2. 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

 

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.

 

The default Samba server configuration enabled both the "wide links" and

"unix extensions" options, allowing Samba clients with write access to a

share to create symbolic links that point to any location on the file

system. Clients connecting with CIFS UNIX extensions disabled could have

such links resolved on the server, allowing them to access and possibly

overwrite files outside of the share. With this update, "wide links" is

set to "no" by default. In addition, the update ensures "wide links" is

disabled for shares that have "unix extensions" enabled. (CVE-2010-0926)

 

Warning: This update may cause files and directories that are only linked

to Samba shares using symbolic links to become inaccessible to Samba

clients. In deployments where support for CIFS UNIX extensions is not

needed (such as when files are exported to Microsoft Windows clients),

administrators may prefer to set the "unix extensions" option to "no" to

allow the use of symbolic links to access files out of the shared

directories. All existing symbolic links in a share should be reviewed

before re-enabling "wide links".

 

These updated samba packages also fix the following bug:

 

* The smbclient tool sometimes failed to return the proper exit status

code. Consequently, using smbclient in a script caused some scripts to

fail. With this update, an upstream patch has been applied and smbclient

now returns the correct exit status. (BZ#768908)

 

In addition, these updated samba packages provide the following

enhancement:

 

* With this update, support for Windows Server 2008 R2 domains has been

added. (BZ#736124)

 

Users are advised to upgrade to these updated samba packages, which correct

these issues and add this enhancement. After installing this update, the

smb service will be restarted automatically.

 

4. 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/kb/docs/DOC-11259

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

562568 - CVE-2010-0926 samba: insecure "wide links" default

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 5 client):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/samba-3.0.33-3.37.el5.src.rpm

 

i386:

libsmbclient-3.0.33-3.37.el5.i386.rpm

samba-3.0.33-3.37.el5.i386.rpm

samba-client-3.0.33-3.37.el5.i386.rpm

samba-common-3.0.33-3.37.el5.i386.rpm

samba-debuginfo-3.0.33-3.37.el5.i386.rpm

samba-swat-3.0.33-3.37.el5.i386.rpm

 

x86_64:

libsmbclient-3.0.33-3.37.el5.i386.rpm

libsmbclient-3.0.33-3.37.el5.x86_64.rpm

samba-3.0.33-3.37.el5.x86_64.rpm

samba-client-3.0.33-3.37.el5.x86_64.rpm

samba-common-3.0.33-3.37.el5.i386.rpm

samba-common-3.0.33-3.37.el5.x86_64.rpm

samba-debuginfo-3.0.33-3.37.el5.i386.rpm

samba-debuginfo-3.0.33-3.37.el5.x86_64.rpm

samba-swat-3.0.33-3.37.el5.x86_64.rpm

 

RHEL Desktop Workstation (v. 5 client):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/samba-3.0.33-3.37.el5.src.rpm

 

i386:

libsmbclient-devel-3.0.33-3.37.el5.i386.rpm

samba-debuginfo-3.0.33-3.37.el5.i386.rpm

 

x86_64:

libsmbclient-devel-3.0.33-3.37.el5.i386.rpm

libsmbclient-devel-3.0.33-3.37.el5.x86_64.rpm

samba-debuginfo-3.0.33-3.37.el5.i386.rpm

samba-debuginfo-3.0.33-3.37.el5.x86_64.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/samba-3.0.33-3.37.el5.src.rpm

 

i386:

libsmbclient-3.0.33-3.37.el5.i386.rpm

libsmbclient-devel-3.0.33-3.37.el5.i386.rpm

samba-3.0.33-3.37.el5.i386.rpm

samba-client-3.0.33-3.37.el5.i386.rpm

samba-common-3.0.33-3.37.el5.i386.rpm

samba-debuginfo-3.0.33-3.37.el5.i386.rpm

samba-swat-3.0.33-3.37.el5.i386.rpm

 

ia64:

libsmbclient-3.0.33-3.37.el5.ia64.rpm

libsmbclient-devel-3.0.33-3.37.el5.ia64.rpm

samba-3.0.33-3.37.el5.ia64.rpm

samba-client-3.0.33-3.37.el5.ia64.rpm

samba-common-3.0.33-3.37.el5.ia64.rpm

samba-debuginfo-3.0.33-3.37.el5.ia64.rpm

samba-swat-3.0.33-3.37.el5.ia64.rpm

 

ppc:

libsmbclient-3.0.33-3.37.el5.ppc.rpm

libsmbclient-3.0.33-3.37.el5.ppc64.rpm

libsmbclient-devel-3.0.33-3.37.el5.ppc.rpm

libsmbclient-devel-3.0.33-3.37.el5.ppc64.rpm

samba-3.0.33-3.37.el5.ppc.rpm

samba-client-3.0.33-3.37.el5.ppc.rpm

samba-common-3.0.33-3.37.el5.ppc.rpm

samba-common-3.0.33-3.37.el5.ppc64.rpm

samba-debuginfo-3.0.33-3.37.el5.ppc.rpm

samba-debuginfo-3.0.33-3.37.el5.ppc64.rpm

samba-swat-3.0.33-3.37.el5.ppc.rpm

 

s390x:

libsmbclient-3.0.33-3.37.el5.s390.rpm

libsmbclient-3.0.33-3.37.el5.s390x.rpm

libsmbclient-devel-3.0.33-3.37.el5.s390.rpm

libsmbclient-devel-3.0.33-3.37.el5.s390x.rpm

samba-3.0.33-3.37.el5.s390x.rpm

samba-client-3.0.33-3.37.el5.s390x.rpm

samba-common-3.0.33-3.37.el5.s390.rpm

samba-common-3.0.33-3.37.el5.s390x.rpm

samba-debuginfo-3.0.33-3.37.el5.s390.rpm

samba-debuginfo-3.0.33-3.37.el5.s390x.rpm

samba-swat-3.0.33-3.37.el5.s390x.rpm

 

x86_64:

libsmbclient-3.0.33-3.37.el5.i386.rpm

libsmbclient-3.0.33-3.37.el5.x86_64.rpm

libsmbclient-devel-3.0.33-3.37.el5.i386.rpm

libsmbclient-devel-3.0.33-3.37.el5.x86_64.rpm

samba-3.0.33-3.37.el5.x86_64.rpm

samba-client-3.0.33-3.37.el5.x86_64.rpm

samba-common-3.0.33-3.37.el5.i386.rpm

samba-common-3.0.33-3.37.el5.x86_64.rpm

samba-debuginfo-3.0.33-3.37.el5.i386.rpm

samba-debuginfo-3.0.33-3.37.el5.x86_64.rpm

samba-swat-3.0.33-3.37.el5.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/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2010-0926.html

https://access.redhat.com/security/updates/classification/#low

 

8. Contact:

 

The Red Hat security contact is . More contact

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

 

Copyright 2012 Red Hat, Inc.

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