==========================================================================
Ubuntu Security Notice USN-4364-1
May 18, 2020

linux, linux-aws, linux-lts-xenial, linux-raspi2, linux-snapdragon
vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM

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-raspi2: Linux kernel for Raspberry Pi (V7) systems
- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors
- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel
did not properly deallocate memory in certain error conditions. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2019-19060)

It was discovered that the vhost net driver in the Linux kernel contained a
stack buffer overflow. A local attacker with the ability to perform ioctl()
calls on /dev/vhost-net could use this to cause a denial of service (system
crash). (CVE-2020-10942)

It was discovered that the Serial CAN interface driver in the Linux kernel
did not properly initialize data. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2020-11494)

It was discovered that the linux kernel did not properly validate certain
mount options to the tmpfs virtual memory file system. A local attacker
with the ability to specify mount options could use this to cause a denial
of service (system crash). (CVE-2020-11565)

It was discovered that the OV51x USB Camera device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2020-11608)

It was discovered that the STV06XX USB Camera device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2020-11609)

It was discovered that the Xirlink C-It USB Camera device driver in the
Linux kernel did not properly validate device metadata. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2020-11668)

Update instructions:

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1107-aws      4.4.0-1107.118
  linux-image-4.4.0-1133-raspi2   4.4.0-1133.142
  linux-image-4.4.0-1137-snapdragon  4.4.0-1137.145
  linux-image-4.4.0-179-generic   4.4.0-179.209
  linux-image-4.4.0-179-generic-lpae  4.4.0-179.209
  linux-image-4.4.0-179-lowlatency  4.4.0-179.209
  linux-image-4.4.0-179-powerpc-e500mc  4.4.0-179.209
  linux-image-4.4.0-179-powerpc-smp  4.4.0-179.209
  linux-image-4.4.0-179-powerpc64-emb  4.4.0-179.209
  linux-image-4.4.0-179-powerpc64-smp  4.4.0-179.209
  linux-image-aws                 4.4.0.1107.111
  linux-image-generic             4.4.0.179.187
  linux-image-generic-lpae        4.4.0.179.187
  linux-image-lowlatency          4.4.0.179.187
  linux-image-powerpc-e500mc      4.4.0.179.187
  linux-image-powerpc-smp         4.4.0.179.187
  linux-image-powerpc64-emb       4.4.0.179.187
  linux-image-powerpc64-smp       4.4.0.179.187
  linux-image-raspi2              4.4.0.1133.133
  linux-image-snapdragon          4.4.0.1137.129
  linux-image-virtual             4.4.0.179.187

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1067-aws      4.4.0-1067.71
  linux-image-4.4.0-179-generic   4.4.0-179.209~14.04.1+signed1
  linux-image-4.4.0-179-generic-lpae  4.4.0-179.209~14.04.1
  linux-image-4.4.0-179-lowlatency  4.4.0-179.209~14.04.1+signed1
  linux-image-4.4.0-179-powerpc-e500mc  4.4.0-179.209~14.04.1
  linux-image-4.4.0-179-powerpc-smp  4.4.0-179.209~14.04.1
  linux-image-4.4.0-179-powerpc64-emb  4.4.0-179.209~14.04.1
  linux-image-4.4.0-179-powerpc64-smp  4.4.0-179.209~14.04.1
  linux-image-aws                 4.4.0.1067.68
  linux-image-generic-lpae-lts-xenial  4.4.0.179.158
  linux-image-generic-lts-xenial  4.4.0.179.158
  linux-image-lowlatency-lts-xenial  4.4.0.179.158
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.179.158
  linux-image-powerpc-smp-lts-xenial  4.4.0.179.158
  linux-image-powerpc64-emb-lts-xenial  4.4.0.179.158
  linux-image-powerpc64-smp-lts-xenial  4.4.0.179.158
  linux-image-virtual-lts-xenial  4.4.0.179.158

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/4364-1
  CVE-2019-19060, CVE-2020-10942, CVE-2020-11494, CVE-2020-11565,
  CVE-2020-11608, CVE-2020-11609, CVE-2020-11668

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.4.0-179.209
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1107.118
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1133.142
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1137.145