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Alerts This Week
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Red Hat 6.7 RHSA-2016:2076-01 Important: Kernel Keyring Issue

red hat
Calendar Grey October 18, 2016
Scroller Redhat
Red Hat issues kernel patch for RHEL 6.7 EUS resolving severe keyring vulnerability; system reboot necessary for implementation.
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):
* A flaw was found in the Linux kernel's keyring handling code, where in key_reject_and_link() an uninitialized variable would eventually lead to arbitrary free address which could allow attacker to use a use-after-free style attack. (CVE-2016-4470, Important)
This issue was discovered by David Howells (Red Hat Inc.).

Topics%20covered

Topics Covered

security advisory Red Hat kernel update patch important keyring issue CVE-2016-4470

References

https://access.redhat.com/security/cve/CVE-2016-4470 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux HPC Node EUS (v. 6.7):
Source: kernel-2.6.32-573.35.1.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-573.35.1.el6.noarch.rpm kernel-doc-2.6.32-573.35.1.el6.noarch.rpm kernel-firmware-2.6.32-573.35.1.el6.noarch.rpm
x86_64: kernel-2.6.32-573.35.1.el6.x86_64.rpm kernel-debug-2.6.32-573.35.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-573.35.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.35.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-573.35.1.el6.i686.rpm kernel-debug-devel-2.6.32-573.35.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.35.1.el6.i686.rpm kernel-debuginfo-2.6.32-573.35.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-573.35.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-573.35.1.el6.x86_64.rpm kernel-devel-2.6.32-573.35.1.el6.x86_64.rpm kernel-headers-2.6.32-573.35.1.el6.x86_64.rpm perf-2.6.32-573.35.1.el6.x86_64.rpm perf-debuginfo-2.6.32-573.35.1.el6.i686.rpm perf-debuginfo-2.6.32-573.35.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.35.1.el6.i686.rpm python-perf-debuginfo-2.6.32-573.35.1.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):
x86_64: kernel-debug-debuginfo-2.6.32-573.35.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.35.1.el6.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2076-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2076.html
Issue date: 2016-10-18

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 Red Hat kernel update patch important keyring issue CVE-2016-4470

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

1341716 - CVE-2016-4470 kernel: Uninitialized variable in request_key handling causes kernel crash in error handling path

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