Issued:: 2010-07-08
Updated:: 2010-07-08

RHSA-2010:0521 - Moderate: gfs-kmod security update

Synopsis

Moderate: gfs-kmod security update

Type/Severity

Security Advisory Moderate

Topic

Updated gfs-kmod packages that fix one security issue are now available for Red Hat Enterprise Linux 5.4 Extended Update Support, kernel release 2.6.18-164.19.1.el5.

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

Description

The gfs-kmod packages contain modules that provide the ability to mount and use GFS file systems.

A flaw was found in the gfs_lock() implementation. The GFS locking code could skip the lock operation for files that have the S_ISGID bit (set-group-ID on execution) in their mode set. A local, unprivileged user on a system that has a GFS file system mounted could use this flaw to cause a kernel panic. (CVE-2010-0727)

These updated gfs-kmod packages are in sync with the latest kernel (2.6.18-164.19.1.el5). The modules in earlier gfs-kmod packages failed to load because they did not match the running kernel. It was possible to force-load the modules. With this update, however, users no longer need to.

Users are advised to upgrade to these latest gfs-kmod packages, updated for use with the 2.6.18-164.19.1.el5 kernel, which contain a backported patch to correct this issue.

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 This content is not included.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

Product	Version	Arch
Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support	5.4	x86_64
Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support	5.4	ppc
Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support	5.4	ia64
Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support	5.4	i386

Updated Packages

kmod-gfs-PAE-0.1.34-2.el5_4.3.i686.rpm
kmod-gfs-0.1.34-2.el5_4.3.i686.rpm
kmod-gfs-xen-0.1.34-2.el5_4.3.i686.rpm

Fixes

This content is not included.BZ - 570863

CVEs

CVE-2010-0727

References

http://www.redhat.com/security/updates/classification/#moderate

Additional information

The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.