Important: kernel security update

Related Vulnerabilities: CVE-2014-9322   CVE-2014-9322   CVE-2014-9322  

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 6.5 Extended Update Support.

Red Hat Product Security 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.

  • A flaw was found in the way the Linux kernel handled GS segment register
    base switching when recovering from a #SS (stack segment) fault on an
    erroneous return to user space. A local, unprivileged user could use this
    flaw to escalate their privileges on the system. (CVE-2014-9322, Important)

Red Hat would like to thank Andy Lutomirski for reporting this issue.

All kernel users are advised to 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/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 - Extended Update Support 6.5 x86_64
  • Red Hat Enterprise Linux Server - Extended Update Support 6.5 i386
  • Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.5 s390x
  • Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.5 ppc64
  • Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.5 x86_64
  • Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.5 i386
  • Red Hat Enterprise Linux EUS Compute Node 6.5 x86_64
  • Red Hat Enterprise Linux Server - AUS 6.5 x86_64
  • Red Hat Enterprise Linux Server - TUS 6.5 x86_64

Fixes

  • BZ - 1172806 - CVE-2014-9322 kernel: x86: local privesc due to bad_iret and paranoid entry incompatibility

CVEs

References