=========================================================================
Ubuntu Security Notice USN-4227-1
January 07, 2020

linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15,
linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2,
linux-snapdragon vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

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-gke-4.15: Linux kernel for Google Container Engine (GKE) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oem: Linux kernel for OEM processors
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi2: Linux kernel for Raspberry Pi 2
- linux-snapdragon: Linux kernel for Snapdragon processors
- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel

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)

It was discovered that the Fujitsu ES network device driver for the Linux
kernel did not properly check for errors in some situations, leading to a
NULL pointer dereference. A local attacker could use this to cause a denial
of service. (CVE-2019-16231)

It was discovered that the QLogic Fibre Channel driver in the Linux kernel
did not properly check for error, leading to a NULL pointer dereference. A
local attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-16233)

Anthony Steinhauser discovered that the Linux kernel did not properly
perform Spectre_RSB mitigations to all processors for PowerPC architecture
systems in some situations. A local attacker could use this to expose
sensitive information. (CVE-2019-18660)

It was discovered that the Mellanox Technologies Innova driver in the Linux
kernel did not properly deallocate memory in certain failure conditions. A
local attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-19045)

It was discovered that Geschwister Schneider USB CAN interface driver in
the Linux kernel did not properly deallocate memory in certain failure
conditions. A physically proximate attacker could use this to cause a
denial of service (kernel memory exhaustion). (CVE-2019-19052)

It was discovered that the AMD Display Engine Driver in the Linux kernel
did not properly deallocate memory in certain error conditions. A local
attack could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19083)

It was discovered that the driver for memoryless force-feedback input
devices in the Linux kernel contained a use-after-free vulnerability. A
physically proximate attacker could possibly use this to cause a denial of
service (system crash) or execute arbitrary code. (CVE-2019-19524)

It was discovered that the Microchip CAN BUS Analyzer driver in the Linux
kernel contained a use-after-free vulnerability on device disconnect. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-19529)

It was discovered that the PEAK-System Technik USB driver in the Linux
kernel did not properly sanitize memory before sending it to the device. A
physically proximate attacker could use this to expose sensitive
information (kernel memory). (CVE-2019-19534)

Tristan Madani discovered that the ALSA timer implementation in the Linux
kernel contained a use-after-free vulnerability. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2019-19807)

Update instructions:

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1031-oracle  4.15.0-1031.34
  linux-image-4.15.0-1050-gke     4.15.0-1050.53
  linux-image-4.15.0-1052-kvm     4.15.0-1052.52
  linux-image-4.15.0-1053-raspi2  4.15.0-1053.57
  linux-image-4.15.0-1057-aws     4.15.0-1057.59
  linux-image-4.15.0-1066-oem     4.15.0-1066.76
  linux-image-4.15.0-1070-snapdragon  4.15.0-1070.77
  linux-image-4.15.0-74-generic   4.15.0-74.84
  linux-image-4.15.0-74-generic-lpae  4.15.0-74.84
  linux-image-4.15.0-74-lowlatency  4.15.0-74.84
  linux-image-aws                 4.15.0.1057.58
  linux-image-aws-lts-18.04       4.15.0.1057.58
  linux-image-generic             4.15.0.74.76
  linux-image-generic-lpae        4.15.0.74.76
  linux-image-gke                 4.15.0.1050.53
  linux-image-gke-4.15            4.15.0.1050.53
  linux-image-kvm                 4.15.0.1052.52
  linux-image-lowlatency          4.15.0.74.76
  linux-image-oem                 4.15.0.1066.70
  linux-image-oracle              4.15.0.1031.36
  linux-image-oracle-lts-18.04    4.15.0.1031.36
  linux-image-powerpc-e500mc      4.15.0.74.76
  linux-image-powerpc-smp         4.15.0.74.76
  linux-image-powerpc64-emb       4.15.0.74.76
  linux-image-powerpc64-smp       4.15.0.74.76
  linux-image-raspi2              4.15.0.1053.51
  linux-image-snapdragon          4.15.0.1070.73
  linux-image-virtual             4.15.0.74.76

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1031-oracle  4.15.0-1031.34~16.04.1
  linux-image-4.15.0-1052-gcp     4.15.0-1052.56
  linux-image-4.15.0-1057-aws     4.15.0-1057.59~16.04.1
  linux-image-4.15.0-1066-azure   4.15.0-1066.71
  linux-image-4.15.0-74-generic   4.15.0-74.83~16.04.1
  linux-image-4.15.0-74-generic-lpae  4.15.0-74.83~16.04.1
  linux-image-4.15.0-74-lowlatency  4.15.0-74.83~16.04.1
  linux-image-aws-hwe             4.15.0.1057.57
  linux-image-azure               4.15.0.1066.69
  linux-image-azure-edge          4.15.0.1066.69
  linux-image-gcp                 4.15.0.1052.66
  linux-image-generic-hwe-16.04   4.15.0.74.94
  linux-image-generic-lpae-hwe-16.04  4.15.0.74.94
  linux-image-gke                 4.15.0.1052.66
  linux-image-lowlatency-hwe-16.04  4.15.0.74.94
  linux-image-oem                 4.15.0.74.94
  linux-image-oracle              4.15.0.1031.24
  linux-image-virtual-hwe-16.04   4.15.0.74.94

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.

References:
  https://usn.ubuntu.com/4227-1
  CVE-2019-14895, CVE-2019-14896, CVE-2019-14897, CVE-2019-14901,
  CVE-2019-16231, CVE-2019-16233, CVE-2019-18660, CVE-2019-19045,
  CVE-2019-19052, CVE-2019-19083, CVE-2019-19524, CVE-2019-19529,
  CVE-2019-19534, CVE-2019-19807

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.15.0-74.84
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1057.59
  https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1050.53
  https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1052.52
  https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1066.76
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1031.34
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1053.57
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1070.77
  https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1057.59~16.04.1
  https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1066.71
  https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1052.56
  https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-74.83~16.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1031.34~16.04.1