Ubuntu 16.04 LTS: USN-4095-1 Critical: Multiple Kernel Risks

ubuntu

August 13, 2019

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-kvm: Linux kernel for cloud environments

- linux-raspi2: Linux kernel for Raspberry Pi 2

- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

Eli Biham and Lior Neumann discovered that the Bluetooth implementation in

the Linux kernel did not properly validate elliptic curve parameters during

Diffie-Hellman key exchange in some situations. An attacker could use this

to expose sensitive information. (CVE-2018-5383)

It was discovered that a heap buffer overflow existed in the Marvell

Wireless LAN device driver for the Linux kernel. An attacker could use this

to cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2019-10126)

Andrei Vlad Lutas and Dan Lutas discovered that some x86 processorsincorrectly handle SWAPGS instructions during speculative execution. A

local at...

Read the Full Advisory

Topics Covered

security advisory buffer overflow DoS Ubuntu race condition kernel information disclosure

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1054-kvm      4.4.0-1054.61
  linux-image-4.4.0-1090-aws      4.4.0-1090.101
  linux-image-4.4.0-1118-raspi2   4.4.0-1118.127
  linux-image-4.4.0-1122-snapdragon  4.4.0-1122.128
  linux-image-4.4.0-159-generic   4.4.0-159.187
  linux-image-4.4.0-159-generic-lpae  4.4.0-159.187
  linux-image-4.4.0-159-lowlatency  4.4.0-159.187
  linux-image-4.4.0-159-powerpc-e500mc  4.4.0-159.187
  linux-image-4.4.0-159-powerpc-smp  4.4.0-159.187
  linux-image-4.4.0-159-powerpc64-emb  4.4.0-159.187
  linux-image-4.4.0-159-powerpc64-smp  4.4.0-159.187
  linux-image-aws                 4.4.0.1090.94
  linux-image-generic             4.4.0.159.167
  linux-image-generic-lpae        4.4.0.159.167
  linux-image-kvm                 4.4.0.1054.54
  linux-image-lowlatency          4.4.0.159.167
  linux-image-powerpc-e500mc      4.4.0.159.167
  linux-image-powerpc-smp         4.4.0.159.167
  linux-image-powerpc64-emb       4.4.0.159.167
  linux-image-powerpc64-smp       4.4.0.159.167
  linux-image-raspi2              4.4.0.1118.118
  linux-image-snapdragon          4.4.0.1122.114
  linux-image-virtual             4.4.0.159.167

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.