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Red Hat 6.7 RHSA-2018-1346 Significant Kernel Fix for DoS Vulnerability

red hat
Calendar Grey May 8, 2018
Scroller Redhat
An urgent kernel update addressing security vulnerabilities and bugs has been released for Red Hat Enterprise Linux version 6.7, outlining significant impact information.
An update for kernel is now available for Red Hat Enterprise Linux 6.7 Extended Update Support

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.

Summary

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#1554253)

Topics%20covered

Topics Covered

security advisory security issue Red Hat kernel update bug fix DoS important

References

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

Package List

Red Hat Enterprise Linux HPC Node EUS (v. 6.7):
Source: kernel-2.6.32-573.55.2.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-573.55.2.el6.noarch.rpm kernel-doc-2.6.32-573.55.2.el6.noarch.rpm kernel-firmware-2.6.32-573.55.2.el6.noarch.rpm
x86_64: kernel-2.6.32-573.55.2.el6.x86_64.rpm kernel-debug-2.6.32-573.55.2.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-573.55.2.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm kernel-debug-devel-2.6.32-573.55.2.el6.i686.rpm kernel-debug-devel-2.6.32-573.55.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.55.2.el6.i686.rpm kernel-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-573.55.2.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-573.55.2.el6.x86_64.rpm kernel-devel-2.6.32-573.55.2.el6.x86_64.rpm kernel-headers-2.6.32-573.55.2.el6.x86_64.rpm perf-2.6.32-573.55.2.el6.x86_64.rpm perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm python-perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):
x86_64: kernel-debug-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:1346-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1346
Issue date: 2018-05-08

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.7Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue Red Hat kernel update bug fix DoS important

Relevant Releases Architectures

Red Hat Enterprise Linux HPC Node EUS (v. 6.7) - noarch, x86_64

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64

Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64

Bugs Fixed

1519781 - CVE-2017-5754 hw: cpu: speculative execution permission faults handling

1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS

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