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Red Hat Enterprise Linux 6 RHSA-2013:1543-02 Moderate: Samba4 DoS

red hat
Calendar Grey November 20, 2013
Dist Redhat Esm H88
Recent samba4 updates released for Red Hat 6 resolve security vulnerabilities and correct defects that carry moderate implications alongside remedial actions.
Updated samba4 packages that fix one security issue and two bugs are now available for Red Hat Enterprise Linux 6

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.
An integer overflow flaw was found in the way Samba handled an Extended Attribute (EA) list provided by a client. A malicious client could send a specially crafted EA list that triggered an overflow, causing the server to loop and reprocess the list using an excessive amount of memory. (CVE-2013-4124)
Note: This issue did not affect the default configuration of the Samba server.
This update fixes the following bugs:
* When Samba was installed in the build root directory, the RPM target might not have existed. Consequently, the find-debuginfo.sh script did not create symbolic links for the libwbclient.so.debug module associated with the target. With this update, the paths to the symbolic links are relative so that the symbolic links are now created correctly. (BZ#882338)
* Previously, the samba4 packages were missing a dependency for the libreplace.so module which could lead to installation failures. With this update, the missing dependency has been added to the dependency list of the samba4 packages and installation now proceeds as expected. (BZ#911264)
All samba4 users are advised to upgrade to these updated packages, which contain a backported patch to correct these issues.

Topics%20covered

Topics Covered

security advisory moderate bug fix DoS samba Red Hat Enterprise Linux integer overflow

References

https://access.redhat.com/security/cve/CVE-2013-4124 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: samba4-4.0.0-58.el6.rc4.i686.rpm samba4-client-4.0.0-58.el6.rc4.i686.rpm samba4-common-4.0.0-58.el6.rc4.i686.rpm samba4-dc-4.0.0-58.el6.rc4.i686.rpm samba4-dc-libs-4.0.0-58.el6.rc4.i686.rpm samba4-debuginfo-4.0.0-58.el6.rc4.i686.rpm samba4-devel-4.0.0-58.el6.rc4.i686.rpm samba4-libs-4.0.0-58.el6.rc4.i686.rpm samba4-pidl-4.0.0-58.el6.rc4.i686.rpm samba4-python-4.0.0-58.el6.rc4.i686.rpm samba4-swat-4.0.0-58.el6.rc4.i686.rpm samba4-test-4.0.0-58.el6.rc4.i686.rpm samba4-winbind-4.0.0-58.el6.rc4.i686.rpm samba4-winbind-clients-4.0.0-58.el6.rc4.i686.rpm samba4-winbind-krb5-locator-4.0.0-58.el6.rc4.i686.rpm
x86_64: samba4-4.0.0-58.el6.rc4.x86_64.rpm samba4-client-4.0.0-58.el6.rc4.x86_64.rpm samba4-common-4.0.0-58.el6.rc4.x86_64.rpm samba4-dc-4.0.0-58.el6.rc4.x86_64.rpm samba4-dc-libs-4.0.0-58.el6.rc4.x86_64.rpm samba4-debuginfo-4.0.0-58.el6.rc4.x86_64.rpm samba4-devel-4.0.0-58.el6.rc4.x86_64.rpm samba4-libs-4.0.0-58.el6.rc4.x86_64.rpm samba4-pidl-4.0.0-58.el6.rc4.x86_64.rpm samba4-python-4.0.0-58.el6.rc4.x86_64.rpm samba4-swat-4.0.0-58.el6.rc4.x86_64.rpm samba4-test-4.0.0-58.el6.rc4.x86_64.rpm samba4-winbind-4.0.0-58.el6.rc4.x86_64.rpm samba4-winbind-clients-4.0.0-58.el6.rc4.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2013:1543-02
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:1543.html
Issue date: 2013-11-21

Topic

Updated samba4 packages that fix one security issue and two bugs are nowavailable for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory moderate bug fix DoS samba Red Hat Enterprise Linux integer overflow

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

Bugs Fixed

911264 - libreplace.so => not found

984401 - CVE-2013-4124 samba: DoS via integer overflow when reading an EA list

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