Security Advisory Important: rhev-hypervisor5 security and bug fix update

Advisory: RHSA-2012:1324-1
Type: Security Advisory
Severity: Important
Issued on: 2012-10-02
Last updated on: 2012-10-02
Affected Products: Red Hat Enterprise Virtualization
CVEs ( CVE-2012-3412


An updated rhev-hypervisor5 package that fixes one security issue and
various bugs is now available.

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

The rhev-hypervisor5 package provides a Red Hat Enterprise Virtualization
Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor
is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes
everything necessary to run and manage virtual machines: A subset of the
Red Hat Enterprise Linux operating environment and the Red Hat Enterprise
Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for
the Intel 64 and AMD64 architectures with virtualization extensions.

A flaw was found in the way socket buffers (skb) requiring TSO (TCP segment
offloading) were handled by the sfc driver. If the skb did not fit within
the minimum-size of the transmission queue, the network card could
repeatedly reset itself. A remote attacker could use this flaw to cause a
denial of service. (CVE-2012-3412)

Red Hat would like to thank Ben Hutchings of Solarflare (tm) for reporting
this issue.

This updated package provides updated components that include fixes for
various security issues. These issues have no security impact on Red Hat
Enterprise Virtualization Hypervisor itself, however. The security fixes
included in this update address the following CVE numbers:

CVE-2012-4244 (bind issue)

CVE-2012-2319, CVE-2012-3430, and CVE-2012-3510 (kernel issues)

CVE-2011-3102, CVE-2012-0841, and CVE-2012-2807 (libxml2 issues)

Users of Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package, which fixes these issues.


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

To upgrade Hypervisors in Red Hat Enterprise Virtualization
2.2 environments using the disk image provided by this package, refer to:

To upgrade Hypervisors in Red Hat Enterprise Virtualization
3.0 environments using the disk image provided by this package, refer to:

Updated packages

Red Hat Enterprise Virtualization

File outdated by:  RHBA-2013:0181
    MD5: e931f6cad51c5c76ca818a1297000987
SHA-256: acd5d88cd3382e9a4c0eff232d9e983291ec4947c22d6ace3f0d2cd18560331c
File outdated by:  RHBA-2013:0181
    MD5: 4f24bf740969327781a749369d07e2d7
SHA-256: eac07e273c8f22f25845910da93c99913406f4ffff221cd8d75bfed093f04369
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

844714 - CVE-2012-3412 kernel: sfc: potential remote denial of service through TCP MSS option


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:

The Red Hat security contact is More contact details at