Moderate CentOS kernel Security Update

Metadata

high
7.2
kernel-2.6.32-642.el6.i686.rpm, kernel-2.6.32-642.el6.x86_64.rpm, kernel-abi-whitelists-2.6.32-642.el6.noarch.rpm, kernel-debug-2.6.32-642.el6.i686.rpm, kernel-debug-2.6.32-642.el6.x86_64.rpm, kernel-debug-devel-2.6.32-642.el6.i686.rpm, kernel-debug-devel-2.6.32-642.el6.x86_64.rpm, kernel-devel-2.6.32-642.el6.i686.rpm, kernel-devel-2.6.32-642.el6.x86_64.rpm, kernel-doc-2.6.32-642.el6.noarch.rpm, kernel-firmware-2.6.32-642.el6.noarch.rpm, kernel-headers-2.6.32-642.el6.i686.rpm, kernel-headers-2.6.32-642.el6.x86_64.rpm, perf-2.6.32-642.el6.i686.rpm, perf-2.6.32-642.el6.x86_64.rpm, python-perf-2.6.32-642.el6.i686.rpm, python-perf-2.6.32-642.el6.x86_64.rpm
CVE-2010-5313, CVE-2013-4312, CVE-2014-7842, CVE-2014-8134, CVE-2015-5156, CVE-2015-7509, CVE-2015-8215, CVE-2015-8324, CVE-2015-8543, CVE-2016-3841
rhn.redhat.com, lists.centos.org
2016-05-16
2017-07-27 19:11
ALAS-2016-648
Moderate CentOS kernel Security Update
Important CentOS kernel Security Update
Important CentOS kernel Security Update
CVE-2010-5313 linux
CVE-2015-5156 linux
CVE-2015-8324 linux
CVE-2015-8215 linux
CVE-2014-7842 linux
CVE-2013-4312 linux
CVE-2016-3841 linux
CVE-2015-7509 linux
CVE-2014-8134 linux
CVE-2015-8543 linux
CVE-2010-5313
CVE-2015-5156
CVE-2015-8543
CVE-2014-7842
CVE-2016-3841
CVE-2015-8215
CVE-2015-8324
CVE-2013-4312
CVE-2014-8134
CVE-2015-7509
2017-04-01 19:09
2017-01-05 20:14

Description


An update for kernel is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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.

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

Security Fix(es):

* It was found that reporting emulation failures to user space could lead to either a local (CVE-2014-7842) or a L2->L1 (CVE-2010-5313) denial of service. In the case of a local denial of service, an attacker must have access to the MMIO area or be able to access an I/O port. Please note that on certain systems, HPET is mapped to userspace as part of vdso (vvar) and thus an unprivileged user may generate MMIO transactions (and enter the emulator) this way. (CVE-2010-5313, CVE-2014-7842, Moderate)

* It was found that the Linux kernel did not properly account file descriptors passed over the unix socket against the process limit. A local user could use this flaw to exhaust all available memory on the system. (CVE-2013-4312, Moderate)

* A buffer overflow flaw was found in the way the Linux kernel's virtio-net subsystem handled certain fraglists when the GRO (Generic Receive Offload) functionality was enabled in a bridged network configuration. An attacker on the local network could potentially use this flaw to crash the system, or, although unlikely, elevate their privileges on the system. (CVE-2015-5156, Moderate)

* It was found that the Linux kernel's IPv6 network stack did not properly validate the value of the MTU variable when it was set. A remote attacker could potentially use this flaw to disrupt a target system's networking (packet loss) by setting an invalid MTU value, for example, via a NetworkManager daemon that is processing router advertisement packets running on the target system. (CVE-2015-8215, Moderate)

* A NULL pointer dereference flaw was found in the way the Linux kernel's network subsystem handled socket creation with an invalid protocol identifier. A local user could use this flaw to crash the system. (CVE-2015-8543, Moderate)

* It was found that the espfix functionality does not work for 32-bit KVM paravirtualized guests. A local, unprivileged guest user could potentially use this flaw to leak kernel stack addresses. (CVE-2014-8134, Low)

* A flaw was found in the way the Linux kernel's ext4 file system driver handled non-journal file systems with an orphan list. An attacker with physical access to the system could use this flaw to crash the system or, although unlikely, escalate their privileges on the system. (CVE-2015-7509, Low)

* A NULL pointer dereference flaw was found in the way the Linux kernel's ext4 file system driver handled certain corrupted file system images. An attacker with physical access to the system could use this flaw to crash the system. (CVE-2015-8324, Low)

Red Hat would like to thank Nadav Amit for reporting CVE-2010-5313 and CVE-2014-7842, Andy Lutomirski for reporting CVE-2014-8134, and Dmitriy Monakhov (OpenVZ) for reporting CVE-2015-8324. The CVE-2015-5156 issue was discovered by Jason Wang (Red Hat).

Additional Changes:

* Refer to Red Hat Enterprise Linux 6.8 Release Notes for information on new kernel features and known issues, and Red Hat Enterprise Linux Technical Notes for information on device driver updates, important changes to external kernel parameters, notable bug fixes, and technology previews. Both of these documents are linked to in the References section.
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Affected package information

Release Package Patched in
6 kernel kernel-2.6.32-642.el6.i686.rpm
kernel kernel-2.6.32-642.el6.x86_64.rpm
kernel-abi-whitelists kernel-abi-whitelists-2.6.32-642.el6.noarch.rpm
kernel-debug kernel-debug-2.6.32-642.el6.i686.rpm
kernel-debug kernel-debug-2.6.32-642.el6.x86_64.rpm
kernel-debug-devel kernel-debug-devel-2.6.32-642.el6.i686.rpm
kernel-debug-devel kernel-debug-devel-2.6.32-642.el6.x86_64.rpm
kernel-devel kernel-devel-2.6.32-642.el6.i686.rpm
kernel-devel kernel-devel-2.6.32-642.el6.x86_64.rpm
kernel-doc kernel-doc-2.6.32-642.el6.noarch.rpm
kernel-firmware kernel-firmware-2.6.32-642.el6.noarch.rpm
kernel-headers kernel-headers-2.6.32-642.el6.i686.rpm
kernel-headers kernel-headers-2.6.32-642.el6.x86_64.rpm
perf perf-2.6.32-642.el6.i686.rpm
perf perf-2.6.32-642.el6.x86_64.rpm
python-perf python-perf-2.6.32-642.el6.i686.rpm
python-perf python-perf-2.6.32-642.el6.x86_64.rpm