Ubuntu 16.04 LTS: USN-4228-1 Critical: Kernel Buffer Overflow Issues

ubuntu

January 6, 2020

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:

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

WiFi-Ex Driver for the Linux kernel. A physically proximate attacker could

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

arbitrary code. (CVE-2019-14895, CVE-2019-14901)

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

Libertas WLAN Driver for the Linux kernel. A physically proximate attacker

could use this to cause a denial of service (system crash) or possibly

execute arbitrary code. (CVE-2019-14896, CVE-2019-14897)

Anthony Steinhauser discovered that the Linux kernel did not properly

perform Spectre_RSB mitigations to all proc...

Read the Full Advisory

Topics Covered

security advisory buffer overflow Ubuntu kernel information exposure Denial of Service

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1064-kvm      4.4.0-1064.71
  linux-image-4.4.0-1100-aws      4.4.0-1100.111
  linux-image-4.4.0-1127-raspi2   4.4.0-1127.136
  linux-image-4.4.0-1131-snapdragon  4.4.0-1131.139
  linux-image-4.4.0-171-generic   4.4.0-171.200
  linux-image-4.4.0-171-generic-lpae  4.4.0-171.200
  linux-image-4.4.0-171-lowlatency  4.4.0-171.200
  linux-image-4.4.0-171-powerpc-e500mc  4.4.0-171.200
  linux-image-4.4.0-171-powerpc-smp  4.4.0-171.200
  linux-image-4.4.0-171-powerpc64-emb  4.4.0-171.200
  linux-image-4.4.0-171-powerpc64-smp  4.4.0-171.200
  linux-image-aws                 4.4.0.1100.104
  linux-image-generic             4.4.0.171.179
  linux-image-generic-lpae        4.4.0.171.179
  linux-image-kvm                 4.4.0.1064.64
  linux-image-lowlatency          4.4.0.171.179
  linux-image-powerpc-e500mc      4.4.0.171.179
  linux-image-powerpc-smp         4.4.0.171.179
  linux-image-powerpc64-emb       4.4.0.171.179
  linux-image-powerpc64-smp       4.4.0.171.179
  linux-image-raspi2              4.4.0.1127.127
  linux-image-snapdragon          4.4.0.1131.123
  linux-image-virtual             4.4.0.171.179

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.