Issued:
2013-11-14
Updated:
2013-11-14

RHSA-2013:1520 - Moderate: kernel security, bug fix, and enhancement update

Synopsis

Moderate: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory Moderate

Topic

Updated kernel packages that fix two security issues, one bug, and add two enhancements are now available for Red Hat OpenStack 3.0.

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.

Description

Red Hat OpenStack 3.0 includes a custom Red Hat Enterprise Linux 6.4 kernel. These custom kernel packages include support for network namespaces; this support is required to facilitate advanced OpenStack Networking deployments.

  • A flaw was found in the way the Linux kernel's TCP/IP protocol suite implementation handled IPv6 sockets that used the UDP_CORK option. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2013-4162, Moderate)

  • An information leak flaw was found in the way the Linux kernel's device mapper subsystem, under certain conditions, interpreted data written to snapshot block devices. An attacker could use this flaw to read data from disk blocks in free space, which are normally inaccessible. (CVE-2013-4299, Moderate)

Red Hat would like to thank Hannes Frederic Sowa for reporting CVE-2013-4162; and Fujitsu for reporting CVE-2013-4299.

This update also fixes the following bug:

  • Prior to this update, while performing Generic Routing Encapsulation (GRE), the possibility of having a 802.1Q inner header was not considered during the Generic Segmentation Offloading (GSO). With this update, a check has been added to detect the use of 802.1Q and handle the packet accordingly. (BZ#1005804)

In addition, this update adds the following enhancements:

  • This update adds support for Distributed Overlay Virtual Ethernet (DOVE). (BZ#1009025)

  • This update adds support for Virtual Extensible LAN (VXLAN) as an Open vSwitch (OVS) tunneling type. (BZ#1009006)

More information on the Red Hat Enterprise Linux 6.4 kernel packages upon which these custom kernel packages are based is available in RHSA-2013:1436:

https://rhn.redhat.com/errata/RHSA-2013-1436.html

All Red Hat OpenStack 3.0 users deploying the OpenStack Networking service are advised to install these updated packages.

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/site/articles/11258

This Red Hat OpenStack 3.0 kernel may be installed by running this command while logged in as the root user on a system that has the required entitlements and subscriptions attached:

yum install "kernel-2.6.*.openstack.el6.x86_64"

Documentation for both stable and preview releases of Red Hat OpenStack is available at:

This content is not included.https://access.redhat.com/site/documentation/Red_Hat_OpenStack/

In particular it is highly recommended that all users read the Release Notes document for the relevant Red Hat OpenStack release prior to installation.

Affected Products

ProductVersionArch
Red Hat OpenStackgrizzlyx86_64

Updated Packages

  • kernel-firmware-2.6.32-358.123.4.openstack.el6.noarch.rpm
  • kernel-doc-2.6.32-358.123.4.openstack.el6.noarch.rpm
  • kernel-debug-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • kernel-2.6.32-358.123.4.openstack.el6.src.rpm
  • kernel-debuginfo-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • python-perf-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • kernel-devel-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • kernel-headers-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • kernel-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • python-perf-debuginfo-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • kernel-debug-debuginfo-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • perf-debuginfo-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • kernel-debug-devel-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • perf-2.6.32-358.123.4.openstack.el6.x86_64.rpm
  • kernel-debuginfo-common-x86_64-2.6.32-358.123.4.openstack.el6.x86_64.rpm

Fixes

CVEs

References

Additional information