Ubuntu 19.04, 18.04 LTS Security Advisory: Kernel Issues Resolved

ubuntu

September 2, 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-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:

Amit Klein and Benny Pinkas discovered that the Linux kernel did not

sufficiently randomize IP ID values generated for connectionless networking

protocols. A remote attacker could use this to track particular Linux

devices. (CVE-2019-10638)

Praveen Pandey discovered that the Linux kernel did not properly validate

sent signals in some situations on PowerPC systems with transactional

memory disabled. A local attacker could use this to cause a denial of

service. (CVE-2019-13...

Read the Full Advisory

Topics Covered

security advisory buffer overrun DoS remote attack Ubuntu kernel

Update Instructions

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

Ubuntu 19.04:
  linux-image-5.0.0-1015-gcp      5.0.0-1015.15
  linux-image-5.0.0-1015-kvm      5.0.0-1015.16
  linux-image-5.0.0-1015-raspi2   5.0.0-1015.15
  linux-image-5.0.0-1018-azure    5.0.0-1018.19
  linux-image-5.0.0-1019-snapdragon  5.0.0-1019.20
  linux-image-5.0.0-27-generic    5.0.0-27.28
  linux-image-5.0.0-27-generic-lpae  5.0.0-27.28
  linux-image-5.0.0-27-lowlatency  5.0.0-27.28
  linux-image-azure               5.0.0.1018.17
  linux-image-gcp                 5.0.0.1015.41
  linux-image-generic             5.0.0.27.28
  linux-image-generic-lpae        5.0.0.27.28
  linux-image-gke                 5.0.0.1015.41
  linux-image-kvm                 5.0.0.1015.15
  linux-image-lowlatency          5.0.0.27.28
  linux-image-raspi2              5.0.0.1015.12
  linux-image-snapdragon          5.0.0.1019.12
  linux-image-virtual             5.0.0.27.28

Ubuntu 18.04 LTS:
  linux-image-5.0.0-1015-gke      5.0.0-1015.15~18.04.1
  linux-image-5.0.0-1018-azure    5.0.0-1018.19~18.04.1
  linux-image-5.0.0-27-generic    5.0.0-27.28~18.04.1
  linux-image-5.0.0-27-generic-lpae  5.0.0-27.28~18.04.1
  linux-image-5.0.0-27-lowlatency  5.0.0-27.28~18.04.1
  linux-image-azure               5.0.0.1018.28
  linux-image-generic-hwe-18.04   5.0.0.27.84
  linux-image-generic-lpae-hwe-18.04  5.0.0.27.84
  linux-image-gke-5.0             5.0.0.1015.5
  linux-image-lowlatency-hwe-18.04  5.0.0.27.84
  linux-image-snapdragon-hwe-18.04  5.0.0.27.84
  linux-image-virtual-hwe-18.04   5.0.0.27.84

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.