Moderate CentOS kernel Security Update

Metadata

medium
6.9
kernel-3.10.0-229.11.1.el7.src.rpm, kernel-3.10.0-229.11.1.el7.x86_64.rpm, kernel-abi-whitelists-3.10.0-229.11.1.el7.noarch.rpm, kernel-debug-3.10.0-229.11.1.el7.x86_64.rpm, kernel-debug-devel-3.10.0-229.11.1.el7.x86_64.rpm, kernel-devel-3.10.0-229.11.1.el7.x86_64.rpm, kernel-doc-3.10.0-229.11.1.el7.noarch.rpm, kernel-headers-3.10.0-229.11.1.el7.x86_64.rpm, kernel-tools-3.10.0-229.11.1.el7.x86_64.rpm, kernel-tools-libs-3.10.0-229.11.1.el7.x86_64.rpm, kernel-tools-libs-devel-3.10.0-229.11.1.el7.x86_64.rpm, perf-3.10.0-229.11.1.el7.x86_64.rpm, python-perf-3.10.0-229.11.1.el7.x86_64.rpm
CVE-2014-9715, CVE-2015-2666, CVE-2015-2922, CVE-2015-3636
rhn.redhat.com, lists.centos.org
2015-08-06
2017-07-27 19:09
ALAS-2015-523
Moderate CentOS kernel Security Update
CVE-2014-9715 linux
CVE-2015-2666 linux
CVE-2015-3636 linux
CVE-2015-2922 linux
CVE-2015-2922
CVE-2015-3636
CVE-2014-9715
CVE-2015-2666
2017-04-01 19:09
2017-01-05 20:13

Description


Updated kernel packages that fix multiple security issues and several bugs
are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

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

* An integer overflow flaw was found in the way the Linux kernel's
netfilter connection tracking implementation loaded extensions. An attacker
on a local network could potentially send a sequence of specially crafted
packets that would initiate the loading of a large number of extensions,
causing the targeted system in that network to crash. (CVE-2014-9715,
Moderate)

* A stack-based buffer overflow flaw was found in the Linux kernel's early
load microcode functionality. On a system with UEFI Secure Boot enabled, a
local, privileged user could use this flaw to increase their privileges to
the kernel (ring0) level, bypassing intended restrictions in place.
(CVE-2015-2666, Moderate)

* It was found that the Linux kernel's ping socket implementation did not
properly handle socket unhashing during spurious disconnects, which could
lead to a use-after-free flaw. On x86-64 architecture systems, a local user
able to create ping sockets could use this flaw to crash the system.
On non-x86-64 architecture systems, a local user able to create ping
sockets could use this flaw to escalate their privileges on the system.
(CVE-2015-3636, Moderate)

* It was found that the Linux kernel's TCP/IP protocol suite implementation
for IPv6 allowed the Hop Limit value to be set to a smaller value than the
default one. An attacker on a local network could use this flaw to prevent
systems on that network from sending or receiving network packets.
(CVE-2015-2922, Low)

Red Hat would like to thank Nathan Hoad for reporting the CVE-2014-9715
issue.

This update also fixes several bugs. Refer to the following Knowledgebase
article for further information:

https://access.redhat.com/articles/1474193

All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.
Please see https://www.redhat.com/footer/terms-of-use.html

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Affected package information

Release Package Patched in
7 kernel kernel-3.10.0-229.11.1.el7.src.rpm
kernel kernel-3.10.0-229.11.1.el7.x86_64.rpm
kernel-abi-whitelists kernel-abi-whitelists-3.10.0-229.11.1.el7.noarch.rpm
kernel-debug kernel-debug-3.10.0-229.11.1.el7.x86_64.rpm
kernel-debug-devel kernel-debug-devel-3.10.0-229.11.1.el7.x86_64.rpm
kernel-devel kernel-devel-3.10.0-229.11.1.el7.x86_64.rpm
kernel-doc kernel-doc-3.10.0-229.11.1.el7.noarch.rpm
kernel-headers kernel-headers-3.10.0-229.11.1.el7.x86_64.rpm
kernel-tools kernel-tools-3.10.0-229.11.1.el7.x86_64.rpm
kernel-tools-libs kernel-tools-libs-3.10.0-229.11.1.el7.x86_64.rpm
kernel-tools-libs-devel kernel-tools-libs-devel-3.10.0-229.11.1.el7.x86_64.rpm
perf perf-3.10.0-229.11.1.el7.x86_64.rpm
python-perf python-perf-3.10.0-229.11.1.el7.x86_64.rpm