Ubuntu 16.04 LTS USN-3344-1 Critical Kernel Denial Of Service

ubuntu

June 29, 2017

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

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

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

- linux-raspi2: Linux kernel for Raspberry Pi 2

- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

USN 3328-1 fixed a vulnerability in the Linux kernel. However, that

fix introduced regressions for some Java applications. This update

addresses the issue. We apologize for the inconvenience.

Roee Hay discovered that the parallel port printer driver in the Linux

kernel did not properly bounds check passed arguments. A local attacker

with write access to the kernel command line arguments could use this to

execute arbitrary code. (CVE-2017-1000363)

A reference count bug was discovered in the Linux kernel ipx protocol

stack. A local attacker could exploit this flaw to cause a denial of

service or possibly other unspecified problems. (CVE-2...

Read the Full Advisory

Topics Covered

security advisory denial of service critical kernel ubuntu

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1018-gke      4.4.0-1018.18
  linux-image-4.4.0-1022-aws      4.4.0-1022.31
  linux-image-4.4.0-1061-raspi2   4.4.0-1061.69
  linux-image-4.4.0-1063-snapdragon  4.4.0-1063.68
  linux-image-4.4.0-83-generic    4.4.0-83.106
  linux-image-4.4.0-83-generic-lpae  4.4.0-83.106
  linux-image-4.4.0-83-lowlatency  4.4.0-83.106
  linux-image-4.4.0-83-powerpc-e500mc  4.4.0-83.106
  linux-image-4.4.0-83-powerpc-smp  4.4.0-83.106
  linux-image-4.4.0-83-powerpc64-emb  4.4.0-83.106
  linux-image-4.4.0-83-powerpc64-smp  4.4.0-83.106
  linux-image-aws                 4.4.0.1022.25
  linux-image-generic             4.4.0.83.89
  linux-image-generic-lpae        4.4.0.83.89
  linux-image-gke                 4.4.0.1018.20
  linux-image-lowlatency          4.4.0.83.89
  linux-image-powerpc-e500mc      4.4.0.83.89
  linux-image-powerpc-smp         4.4.0.83.89
  linux-image-powerpc64-emb       4.4.0.83.89
  linux-image-powerpc64-smp       4.4.0.83.89
  linux-image-raspi2              4.4.0.1061.62
  linux-image-snapdragon          4.4.0.1063.56

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.