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Red Hat Security Advisory

Synopsis: Important: kernel-rt security update
Advisory ID: RHSA-2014:1998-01
Product: Red Hat Enterprise MRG for RHEL-6
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-1998.html
Issue date: 2014-12-16
CVE Names: CVE-2014-9322
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1. Summary:

Updated kernel-rt packages that fix one security issue are now available
for Red Hat Enterprise MRG 2.5.

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.

2. Relevant releases/architectures:

MRG Realtime for RHEL 6 Server v.2 – noarch, x86_64

3. Description:

The kernel-rt 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.

Users are advised to upgrade to these updated packages, which upgrade the
kernel-rt kernel to version kernel-rt-3.10.58-rt62.60 and correct this
issue. The system must be rebooted for this update to take effect.

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. Package List:

MRG Realtime for RHEL 6 Server v.2:

Source:
kernel-rt-3.10.58-rt62.60.el6rt.src.rpm

noarch:
kernel-rt-doc-3.10.58-rt62.60.el6rt.noarch.rpm
kernel-rt-firmware-3.10.58-rt62.60.el6rt.noarch.rpm

x86_64:
kernel-rt-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-debug-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-debug-devel-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-debuginfo-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-devel-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-trace-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-trace-devel-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-vanilla-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-vanilla-debuginfo-3.10.58-rt62.60.el6rt.x86_64.rpm
kernel-rt-vanilla-devel-3.10.58-rt62.60.el6rt.x86_64.rpm

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

7. References:

https://access.redhat.com/security/cve/CVE-2014-9322
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2014 Red Hat, Inc.
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