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Ubuntu 14.04 LTS USN-3189-2 Moderate: Linux Kernel Denial of Service

ubuntu
Calendar Grey February 3, 2017
Scroller Ubuntu Esm H88
Security fixes for Ubuntu 14.04 LTS kernel address critical stability and security issues.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-3189-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu

14.04 LTS.

Mikulas Patocka discovered that the asynchronous multibuffer cryptographic

daemon (mcryptd) in the Linux kernel did not properly handle being invoked

with incompatible algorithms. A local attacker could use this to cause a

denial of service (system crash). (CVE-2016-10147)

Qidan He discovered that the ICMP implementation in the Linux kernel did

not properly check the size of an ICMP header. A local attacker with

CAP_NET_ADMIN could use this to expose sensitive information.

(CVE-2016-8399)

Topics%20covered

Topics Covered

security advisory moderate denial of service update Ubuntu kernel HWE

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
  linux-image-4.4.0-62-generic    4.4.0-62.83~14.04.1
  linux-image-4.4.0-62-generic-lpae  4.4.0-62.83~14.04.1
  linux-image-4.4.0-62-lowlatency  4.4.0-62.83~14.04.1
  linux-image-4.4.0-62-powerpc-e500mc  4.4.0-62.83~14.04.1
  linux-image-4.4.0-62-powerpc-smp  4.4.0-62.83~14.04.1
  linux-image-4.4.0-62-powerpc64-emb  4.4.0-62.83~14.04.1
  linux-image-4.4.0-62-powerpc64-smp  4.4.0-62.83~14.04.1
  linux-image-generic-lpae-lts-xenial  4.4.0.62.48
  linux-image-generic-lts-xenial  4.4.0.62.48
  linux-image-lowlatency-lts-xenial  4.4.0.62.48
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.62.48
  linux-image-powerpc-smp-lts-xenial  4.4.0.62.48
  linux-image-powerpc64-emb-lts-xenial  4.4.0.62.48
  linux-image-powerpc64-smp-lts-xenial  4.4.0.62.48

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-3189-2

https://ubuntu.com/security/notices/USN-3189-1

CVE-2016-10147, CVE-2016-8399

Severity
important
Lowest
Low
Medium
High
Critical

February 03, 2017

Topics%20covered

Topics Covered

security advisory moderate denial of service update Ubuntu kernel HWE

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-62.83~14.04.1

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