Ubuntu 19.04 and 18.04 LTS: USN-4147-1 Critical: Kernel Crash Threats

ubuntu

October 4, 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- linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems

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

Details:

It was discovered that the Intel Wi-Fi device driver in the Linux kernel

did not properly validate certain Tunneled Direct Link Setup (TDLS). A

physically proximate attacker could use this to cause a denial of service

(Wi-Fi disconnect). (CVE-2019-0136)

It was discovered that the Bluetooth UART implementation in the Linux

kernel did not properly check for missing tty operations. A local attacker

could use thi...

Read the Full Advisory

Topics Covered

security advisory denial of service Ubuntu kernel system update system crash driver issues

Update Instructions

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

Ubuntu 19.04:
  linux-image-5.0.0-1018-aws      5.0.0-1018.20
  linux-image-5.0.0-1019-kvm      5.0.0-1019.20
  linux-image-5.0.0-1019-raspi2   5.0.0-1019.19
  linux-image-5.0.0-1020-gcp      5.0.0-1020.20
  linux-image-5.0.0-1022-azure    5.0.0-1022.23
  linux-image-5.0.0-1023-snapdragon  5.0.0-1023.24
  linux-image-5.0.0-31-generic    5.0.0-31.33
  linux-image-5.0.0-31-generic-lpae  5.0.0-31.33
  linux-image-5.0.0-31-lowlatency  5.0.0-31.33
  linux-image-aws                 5.0.0.1018.19
  linux-image-azure               5.0.0.1022.21
  linux-image-gcp                 5.0.0.1020.46
  linux-image-generic             5.0.0.31.32
  linux-image-generic-lpae        5.0.0.31.32
  linux-image-gke                 5.0.0.1020.46
  linux-image-kvm                 5.0.0.1019.19
  linux-image-lowlatency          5.0.0.31.32
  linux-image-raspi2              5.0.0.1019.16
  linux-image-snapdragon          5.0.0.1023.16
  linux-image-virtual             5.0.0.31.32

Ubuntu 18.04 LTS:
  linux-image-5.0.0-1020-gke      5.0.0-1020.20~18.04.1
  linux-image-5.0.0-31-generic    5.0.0-31.33~18.04.1
  linux-image-5.0.0-31-generic-lpae  5.0.0-31.33~18.04.1
  linux-image-5.0.0-31-lowlatency  5.0.0-31.33~18.04.1
  linux-image-generic-hwe-18.04   5.0.0.31.88
  linux-image-generic-lpae-hwe-18.04  5.0.0.31.88
  linux-image-gke-5.0             5.0.0.1020.9
  linux-image-lowlatency-hwe-18.04  5.0.0.31.88
  linux-image-snapdragon-hwe-18.04  5.0.0.31.88
  linux-image-virtual-hwe-18.04   5.0.0.31.88

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.