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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1253
                     Important: kernel security update
                               29 July 2014

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kernel
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 6
Impact/Access:     Root Compromise   -- Existing Account
                   Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-4699  

Reference:         ESB-2014.1219
                   ESB-2014.1208
                   ESB-2014.1085

Original Bulletin: 
   https://rhn.redhat.com/errata/RHSA-2014-0949.html

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

Copyright 2014 Red Hat, Inc.
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