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Ubuntu 14.04 ESM: USN-4254-2 Critical: Linux Kernel Security Issues

ubuntu
Calendar Grey January 28, 2020
Dist Ubuntu Esm H88
Security risks in Ubuntu Linux kernel resolved with critical updates, enhancing system protection against local attacks.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

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

Details:

USN-4254-1 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 ESM.

It was discovered that the Linux kernel did not properly clear data

structures on context switches for certain Intel graphics processors. A

local attacker could use this to expose sensitive information.

(CVE-2019-14615)

It was discovered that a race condition existed in the Virtual Video Test

Driver in the Linux kernel. An attacker with write access to /dev/video0 on

a system with the vivid module loaded could possibly use this to gain

administrative privileges. (CVE-2019-18683)

It was discovered that the btrfs file system in the Linux kernel d...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory privilege escalation DoS Ubuntu linux kernel AWS Xenial HWE

Update Instructions

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

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1061-aws      4.4.0-1061.65
  linux-image-4.4.0-173-generic   4.4.0-173.203~14.04.1
  linux-image-4.4.0-173-generic-lpae  4.4.0-173.203~14.04.1
  linux-image-4.4.0-173-lowlatency  4.4.0-173.203~14.04.1
  linux-image-4.4.0-173-powerpc-e500mc  4.4.0-173.203~14.04.1
  linux-image-4.4.0-173-powerpc-smp  4.4.0-173.203~14.04.1
  linux-image-4.4.0-173-powerpc64-emb  4.4.0-173.203~14.04.1
  linux-image-4.4.0-173-powerpc64-smp  4.4.0-173.203~14.04.1
  linux-image-aws                 4.4.0.1061.62
  linux-image-generic-lpae-lts-xenial  4.4.0.173.152
  linux-image-generic-lts-xenial  4.4.0.173.152
  linux-image-lowlatency-lts-xenial  4.4.0.173.152
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.173.152
  linux-image-powerpc-smp-lts-xenial  4.4.0.173.152
  linux-image-powerpc64-emb-lts-xenial  4.4.0.173.152
  linux-image-powerpc64-smp-lts-xenial  4.4.0.173.152
  linux-image-virtual-lts-xenial  4.4.0.173.152

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-4254-2

https://ubuntu.com/security/notices/USN-4254-1

CVE-2019-14615, CVE-2019-15291, CVE-2019-18683, CVE-2019-18885,

CVE-2019-19057, CVE-2019-19062, CVE-2019-19063, CVE-2019-19227,

CVE-2019-19332

Severity
critical
Lowest
Low
Medium
High
Critical

January 29, 2020

Topics%20covered

Topics Covered

security advisory privilege escalation DoS Ubuntu linux kernel AWS Xenial HWE

Package Information

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