Issued:
2013-05-17
Updated:
2013-05-17

RHSA-2013:0832 - Important: kernel security update

Synopsis

Important: kernel security update

Type/Severity

Security Advisory Important

Topic

Updated kernel packages that fix one security issue are now available for Red Hat Enterprise Linux 6.3 Extended Update Support.

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.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issue:

  • It was found that the Red Hat Enterprise Linux 6.1 kernel update (RHSA-2011:0542) introduced an integer conversion issue in the Linux kernel's Performance Events implementation. This led to a user-supplied index into the perf_swevent_enabled array not being validated properly, resulting in out-of-bounds kernel memory access. A local, unprivileged user could use this flaw to escalate their privileges. (CVE-2013-2094, Important)

A public exploit that affects Red Hat Enterprise Linux 6 is available.

Refer to Red Hat Knowledge Solution 373743, linked to in the References, for further information and mitigation instructions for users who are unable to immediately apply this update.

Users should upgrade to these updated packages, which contain a backported patch to correct this issue. The system must be rebooted 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 https://access.redhat.com/knowledge/articles/11258

To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.3x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.3i386
Red Hat Enterprise Linux for Power, big endian - Extended Update Support6.3ppc64
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support6.3s390x
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.3x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.3i386

Updated Packages

  • kernel-headers-2.6.32-279.25.2.el6.i686.rpm
  • perf-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-debuginfo-common-i686-2.6.32-279.25.2.el6.i686.rpm
  • kernel-2.6.32-279.25.2.el6.i686.rpm
  • kernel-debug-debuginfo-2.6.32-279.25.2.el6.i686.rpm
  • kernel-debug-2.6.32-279.25.2.el6.x86_64.rpm
  • kernel-firmware-2.6.32-279.25.2.el6.noarch.rpm
  • kernel-devel-2.6.32-279.25.2.el6.i686.rpm
  • python-perf-debuginfo-2.6.32-279.25.2.el6.ppc64.rpm
  • python-perf-2.6.32-279.25.2.el6.x86_64.rpm
  • kernel-debug-debuginfo-2.6.32-279.25.2.el6.x86_64.rpm
  • kernel-doc-2.6.32-279.25.2.el6.noarch.rpm
  • kernel-debuginfo-common-ppc64-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-debug-2.6.32-279.25.2.el6.i686.rpm
  • kernel-debug-devel-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-headers-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-kdump-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-devel-2.6.32-279.25.2.el6.x86_64.rpm
  • kernel-kdump-debuginfo-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-debug-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-bootwrapper-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-2.6.32-279.25.2.el6.src.rpm
  • kernel-debuginfo-common-s390x-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-kdump-devel-2.6.32-279.25.2.el6.s390x.rpm
  • perf-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-debuginfo-common-x86_64-2.6.32-279.25.2.el6.x86_64.rpm
  • kernel-debuginfo-2.6.32-279.25.2.el6.x86_64.rpm
  • python-perf-debuginfo-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-devel-2.6.32-279.25.2.el6.s390x.rpm
  • perf-debuginfo-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-debug-devel-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-debuginfo-2.6.32-279.25.2.el6.i686.rpm
  • python-perf-debuginfo-2.6.32-279.25.2.el6.x86_64.rpm
  • kernel-debug-debuginfo-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-debug-devel-2.6.32-279.25.2.el6.i686.rpm
  • perf-debuginfo-2.6.32-279.25.2.el6.i686.rpm
  • kernel-debug-debuginfo-2.6.32-279.25.2.el6.ppc64.rpm
  • perf-debuginfo-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-debug-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-devel-2.6.32-279.25.2.el6.ppc64.rpm
  • python-perf-2.6.32-279.25.2.el6.s390x.rpm
  • python-perf-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-headers-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-debug-devel-2.6.32-279.25.2.el6.x86_64.rpm
  • kernel-headers-2.6.32-279.25.2.el6.x86_64.rpm
  • perf-2.6.32-279.25.2.el6.x86_64.rpm
  • perf-2.6.32-279.25.2.el6.i686.rpm
  • python-perf-2.6.32-279.25.2.el6.i686.rpm
  • kernel-2.6.32-279.25.2.el6.s390x.rpm
  • kernel-debuginfo-2.6.32-279.25.2.el6.ppc64.rpm
  • kernel-2.6.32-279.25.2.el6.x86_64.rpm
  • kernel-debuginfo-2.6.32-279.25.2.el6.s390x.rpm
  • perf-debuginfo-2.6.32-279.25.2.el6.x86_64.rpm
  • python-perf-debuginfo-2.6.32-279.25.2.el6.i686.rpm

Fixes

CVEs

References

Additional information