Ubuntu 19.04: USN-4157-1 Moderate: Kernel Issues Affecting Multiple Devices

ubuntu

October 16, 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-azure: Linux kernel for Microsoft Azure Cloud systems

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

- linux-kvm: Linux kernel for cloud environments

- linux-raspi2: Linux kernel for Raspberry Pi 2

- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux

kernel did not properly perform bounds checking, leading to a heap

overflow. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2019-14814,

CVE-2019-14815, CVE-2019-14816)

Matt Delco discovered that the KVM hypervisor implementation in the Linux

kernel did not properly perform bounds checking when handling coalesced

MMIO write operations. A local attacker with write access to /dev/kvm could

use t...

Read the Full Advisory

Topics Covered

security advisory privilege escalation heap overflow kernel ubuntu system crash buffer overread

Update Instructions

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

Ubuntu 19.04:
  linux-image-5.0.0-1019-aws      5.0.0-1019.21
  linux-image-5.0.0-1020-kvm      5.0.0-1020.21
  linux-image-5.0.0-1020-raspi2   5.0.0-1020.20
  linux-image-5.0.0-1021-gcp      5.0.0-1021.21
  linux-image-5.0.0-1023-azure    5.0.0-1023.24
  linux-image-5.0.0-1024-snapdragon  5.0.0-1024.25
  linux-image-5.0.0-32-generic    5.0.0-32.34
  linux-image-5.0.0-32-generic-lpae  5.0.0-32.34
  linux-image-5.0.0-32-lowlatency  5.0.0-32.34
  linux-image-aws                 5.0.0.1019.20
  linux-image-azure               5.0.0.1023.22
  linux-image-gcp                 5.0.0.1021.47
  linux-image-generic             5.0.0.32.33
  linux-image-generic-lpae        5.0.0.32.33
  linux-image-gke                 5.0.0.1021.47
  linux-image-kvm                 5.0.0.1020.20
  linux-image-lowlatency          5.0.0.32.33
  linux-image-raspi2              5.0.0.1020.17
  linux-image-snapdragon          5.0.0.1024.17
  linux-image-virtual             5.0.0.32.33

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.