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[RHSA-2014:0949-01] Important: kernel security update

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Red Hat Security Advisory

 

Synopsis: Important: kernel security update

Advisory ID: RHSA-2014:0949-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0949.html

Issue date: 2014-07-28

CVE Names: CVE-2014-4699

=====================================================================

 

1. Summary:

 

Updated kernel packages that fix one security issue are now available for

Red Hat Enterprise Linux 6.2 Advanced 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.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux AUS (v. 6.2 server) - noarch, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - x86_64

 

3. Description:

 

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

 

* It was found that the Linux kernel's ptrace subsystem allowed a traced

process' instruction pointer to be set to a non-canonical memory address

without forcing the non-sysret code path when returning to user space.

A local, unprivileged user could use this flaw to crash the system or,

potentially, escalate their privileges on the system. (CVE-2014-4699,

Important)

 

Note: The CVE-2014-4699 issue only affected systems using an Intel CPU.

 

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.

 

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/):

 

1115927 - CVE-2014-4699 kernel: x86_64: ptrace: sysret to non-canonical address

 

6. Package List:

 

Red Hat Enterprise Linux AUS (v. 6.2 server):

 

Source:

kernel-2.6.32-220.53.1.el6.src.rpm

 

noarch:

kernel-doc-2.6.32-220.53.1.el6.noarch.rpm

kernel-firmware-2.6.32-220.53.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-220.53.1.el6.x86_64.rpm

kernel-debug-2.6.32-220.53.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-220.53.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-220.53.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.53.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.53.1.el6.x86_64.rpm

kernel-devel-2.6.32-220.53.1.el6.x86_64.rpm

kernel-headers-2.6.32-220.53.1.el6.x86_64.rpm

perf-2.6.32-220.53.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.53.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.53.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional AUS (v. 6.2):

 

Source:

kernel-2.6.32-220.53.1.el6.src.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-220.53.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-220.53.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-220.53.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-220.53.1.el6.x86_64.rpm

python-perf-2.6.32-220.53.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-220.53.1.el6.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/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2014-4699.html

https://access.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2014 Red Hat, Inc.

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