Ubuntu 16.04 LTS USN-3931-2 Critical: Kernel Threats Fixed

ubuntu

April 2, 2019

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe: Linux hardware enablement (HWE) kernel

- linux-oracle: Linux kernel for Oracle Cloud systems

Details:

USN-3931-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu

16.04 LTS and for the Linux Azure kernel for Ubuntu 14.04 LTS.

M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not

properly set up all arguments to an error handler callback used when

running as a paravirtualized guest. An unprivileged attacker in a

paravirtualized guest VM could use this to cause a denial of service (guest

VM crash). (CVE-2018-14678)

It was discovered that ...

Read the Full Advisory

Topics Covered

security advisory Ubuntu critical threat kernel linux-aws linux-azure linux-gcp

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1010-oracle  4.15.0-1010.12~16.04.1
  linux-image-4.15.0-1029-gcp     4.15.0-1029.31~16.04.1
  linux-image-4.15.0-1035-aws     4.15.0-1035.37~16.04.1
  linux-image-4.15.0-1041-azure   4.15.0-1041.45
  linux-image-4.15.0-47-generic   4.15.0-47.50~16.04.1
  linux-image-4.15.0-47-generic-lpae  4.15.0-47.50~16.04.1
  linux-image-4.15.0-47-lowlatency  4.15.0-47.50~16.04.1
  linux-image-aws-hwe             4.15.0.1035.35
  linux-image-azure               4.15.0.1041.45
  linux-image-gcp                 4.15.0.1029.43
  linux-image-generic-hwe-16.04   4.15.0.47.68
  linux-image-generic-lpae-hwe-16.04  4.15.0.47.68
  linux-image-gke                 4.15.0.1029.43
  linux-image-lowlatency-hwe-16.04  4.15.0.47.68
  linux-image-oem                 4.15.0.47.68
  linux-image-oracle              4.15.0.1010.4
  linux-image-virtual-hwe-16.04   4.15.0.47.68

Ubuntu 14.04 LTS:
  linux-image-4.15.0-1041-azure   4.15.0-1041.45~14.04.1
  linux-image-azure               4.15.0.1041.28

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.