[RHSA-2018:1349-01] Important: kernel security and bug fix update

Tue May 8 21:49:12 UTC 2018

An update for kernel is now available for Red Hat Enterprise Linux 6.4
Advanced Update Support.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 6.4) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* hw: cpu: speculative execution permission faults handling (CVE-2017-5754)

* Kernel: error in exception handling leads to DoS (CVE-2018-8897)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Red Hat would like to thank Google Project Zero for reporting CVE-2017-5754
and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting
CVE-2018-8897.

Bug Fix(es):

* The kernel build requirements have been updated to the GNU Compiler
Collection (GCC) compiler version that has the support for Retpolines. The
Retpolines mechanism is a software construct that leverages specific
knowledge of the underlying hardware to mitigate the branch target
injection, also known as Spectre variant 2 vulnerability described in
CVE-2017-5715. (BZ#1554251)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

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

1519781 - CVE-2017-5754 hw: cpu: speculative execution permission faults handling
1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 6.4):

Source:
kernel-2.6.32-358.88.2.el6.src.rpm

noarch:
kernel-doc-2.6.32-358.88.2.el6.noarch.rpm
kernel-firmware-2.6.32-358.88.2.el6.noarch.rpm

x86_64:
kernel-2.6.32-358.88.2.el6.x86_64.rpm
kernel-debug-2.6.32-358.88.2.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-358.88.2.el6.x86_64.rpm
kernel-debug-devel-2.6.32-358.88.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.88.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.88.2.el6.x86_64.rpm
kernel-devel-2.6.32-358.88.2.el6.x86_64.rpm
kernel-headers-2.6.32-358.88.2.el6.x86_64.rpm
perf-2.6.32-358.88.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.88.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.88.2.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 6.4):

Source:
kernel-2.6.32-358.88.2.el6.src.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-358.88.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.88.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.88.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.88.2.el6.x86_64.rpm
python-perf-2.6.32-358.88.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.88.2.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/

7. References:

https://access.redhat.com/security/cve/CVE-2018-8897
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5754

8. Contact:

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

Copyright 2018 Red Hat, Inc.
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