Synopsis
Moderate: kernel security and bug fix update
Type/Severity
Security Advisory: Moderate
Topic
Updated kernel packages that fix two security issues and several bugs are
now available for Red Hat Enterprise Linux 6.
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
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
This update fixes the following security issues:
- An integer overflow flaw was found in the i915_gem_execbuffer2() function
in the Intel i915 driver in the Linux kernel. A local, unprivileged user
could use this flaw to cause a denial of service. This issue only affected
32-bit systems. (CVE-2012-2383, Moderate)
- A missing initialization flaw was found in the sco_sock_getsockopt_old()
function in the Linux kernel's Bluetooth implementation. A local,
unprivileged user could use this flaw to cause an information leak.
(CVE-2011-1078, Low)
Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting the
CVE-2011-1078 issue.
This update also fixes several bugs. Documentation for these changes will
be available shortly from the Technical Notes document linked to in the
References section.
Users should upgrade to these updated packages, which contain backported
patches to correct these issues, and fix the bugs noted in the Technical
Notes. 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
-
Red Hat Enterprise Linux Server 6 x86_64
-
Red Hat Enterprise Linux Server 6 i386
-
Red Hat Enterprise Linux Server - Extended Update Support 6.3 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support 6.3 i386
-
Red Hat Enterprise Linux Workstation 6 x86_64
-
Red Hat Enterprise Linux Workstation 6 i386
-
Red Hat Enterprise Linux Desktop 6 x86_64
-
Red Hat Enterprise Linux Desktop 6 i386
-
Red Hat Enterprise Linux for IBM z Systems 6 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.3 s390x
-
Red Hat Enterprise Linux for Power, big endian 6 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.3 ppc64
-
Red Hat Enterprise Linux for Scientific Computing 6 x86_64
-
Red Hat Enterprise Linux Server from RHUI 6 x86_64
-
Red Hat Enterprise Linux Server from RHUI 6 i386
-
Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.3 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.3 i386
Fixes
- BZ - 681259 - CVE-2011-1078 kernel: bt sco_conninfo infoleak
- BZ - 824176 - CVE-2012-2383 kernel: drm/i915: integer overflow in i915_gem_execbuffer2()
- BZ - 842429 - VLAN configured on top of a bonded interface (active-backup) does not failover [rhel-6.3.z]
CVEs
References
Vulmon