Issued:

2011-05-02

Updated:

2011-05-02

RHSA-2011:0479 - Moderate: libvirt security and bug fix update

Synopsis

Moderate: libvirt security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

Updated libvirt packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 6.

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 libvirt library is a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remotely managing virtualized systems.

A flaw was found in the way libvirtd handled error reporting for concurrent connections. A remote attacker able to establish read-only connections to libvirtd on a server could use this flaw to crash libvirtd. (CVE-2011-1486)

This update also fixes the following bug:

• Previously, running qemu under a different UID prevented it from accessing files with mode 0660 permissions that were owned by a different user, but by a group that qemu was a member of. (BZ#668692)

All libvirt users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues. After installing the updated packages, libvirtd must be restarted ("service libvirtd restart") for this update to take effect.

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.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

Updated Packages

• libvirt-devel-0.8.1-27.el6_0.6.i686.rpm
• libvirt-python-0.8.1-27.el6_0.6.ppc64.rpm
• libvirt-0.8.1-27.el6_0.6.s390x.rpm
• libvirt-devel-0.8.1-27.el6_0.6.s390x.rpm
• libvirt-python-0.8.1-27.el6_0.6.x86_64.rpm
• libvirt-python-0.8.1-27.el6_0.6.s390x.rpm
• libvirt-0.8.1-27.el6_0.6.i686.rpm
• libvirt-debuginfo-0.8.1-27.el6_0.6.ppc64.rpm
• libvirt-devel-0.8.1-27.el6_0.6.x86_64.rpm
• libvirt-0.8.1-27.el6_0.6.x86_64.rpm
• libvirt-devel-0.8.1-27.el6_0.6.s390.rpm
• libvirt-debuginfo-0.8.1-27.el6_0.6.x86_64.rpm
• libvirt-debuginfo-0.8.1-27.el6_0.6.s390.rpm
• libvirt-0.8.1-27.el6_0.6.src.rpm
• libvirt-0.8.1-27.el6_0.6.ppc64.rpm
• libvirt-debuginfo-0.8.1-27.el6_0.6.ppc.rpm
• libvirt-python-0.8.1-27.el6_0.6.i686.rpm
• libvirt-debuginfo-0.8.1-27.el6_0.6.i686.rpm
• libvirt-client-0.8.1-27.el6_0.6.i686.rpm
• libvirt-devel-0.8.1-27.el6_0.6.ppc64.rpm
• libvirt-client-0.8.1-27.el6_0.6.ppc.rpm
• libvirt-client-0.8.1-27.el6_0.6.x86_64.rpm
• libvirt-client-0.8.1-27.el6_0.6.ppc64.rpm
• libvirt-debuginfo-0.8.1-27.el6_0.6.s390x.rpm
• libvirt-client-0.8.1-27.el6_0.6.s390.rpm
• libvirt-client-0.8.1-27.el6_0.6.s390x.rpm
• libvirt-devel-0.8.1-27.el6_0.6.ppc.rpm

Fixes

• This content is not included.BZ - 668692
• This content is not included.BZ - 693391

CVEs

• CVE-2011-1486

References

• https://access.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.