[USN-3256-1] Linux kernel vulnerability

[Steve Beattie]

==========================================================================
Ubuntu Security Notice USN-3256-1
April 05, 2017

linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon,
linux-ti-omap4 vulnerability
==========================================================================

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

- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

The system could be made to crash under certain conditions.

Software Description:
- linux: Linux kernel
- linux-raspi2: Linux kernel for Raspberry Pi 2
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-snapdragon: Linux kernel for Snapdragon Processors
- linux-ti-omap4: Linux kernel for OMAP4

Details:

Andrey Konovalov discovered that the AF_PACKET implementation in the Linux
kernel did not properly validate certain block-size data. A local attacker
could use this to cause a denial of service (system crash).

Update instructions:

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

Ubuntu 16.10:
  linux-image-4.8.0-1033-raspi2   4.8.0-1033.36
  linux-image-4.8.0-46-generic    4.8.0-46.49
  linux-image-4.8.0-46-generic-lpae  4.8.0-46.49
  linux-image-4.8.0-46-lowlatency  4.8.0-46.49
  linux-image-4.8.0-46-powerpc-e500mc  4.8.0-46.49
  linux-image-4.8.0-46-powerpc-smp  4.8.0-46.49
  linux-image-4.8.0-46-powerpc64-emb  4.8.0-46.49
  linux-image-generic             4.8.0.46.58
  linux-image-generic-lpae        4.8.0.46.58
  linux-image-lowlatency          4.8.0.46.58
  linux-image-powerpc-e500mc      4.8.0.46.58
  linux-image-powerpc-smp         4.8.0.46.58
  linux-image-powerpc64-smp       4.8.0.46.58
  linux-image-raspi2              4.8.0.1033.37

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1010-gke      4.4.0-1010.10
  linux-image-4.4.0-1013-aws      4.4.0-1013.22
  linux-image-4.4.0-1052-raspi2   4.4.0-1052.59
  linux-image-4.4.0-1055-snapdragon  4.4.0-1055.59
  linux-image-4.4.0-72-generic    4.4.0-72.93
  linux-image-4.4.0-72-generic-lpae  4.4.0-72.93
  linux-image-4.4.0-72-lowlatency  4.4.0-72.93
  linux-image-4.4.0-72-powerpc-e500mc  4.4.0-72.93
  linux-image-4.4.0-72-powerpc-smp  4.4.0-72.93
  linux-image-4.4.0-72-powerpc64-smp  4.4.0-72.93
  linux-image-aws                 4.4.0.1013.16
  linux-image-generic             4.4.0.72.78
  linux-image-generic-lpae        4.4.0.72.78
  linux-image-gke                 4.4.0.1010.12
  linux-image-lowlatency          4.4.0.72.78
  linux-image-powerpc-e500mc      4.4.0.72.78
  linux-image-powerpc-smp         4.4.0.72.78
  linux-image-powerpc64-smp       4.4.0.72.78
  linux-image-powerpc64-smp-lts-utopic  4.4.0.72.78
  linux-image-powerpc64-smp-lts-vivid  4.4.0.72.78
  linux-image-powerpc64-smp-lts-wily  4.4.0.72.78
  linux-image-powerpc64-smp-lts-xenial  4.4.0.72.78
  linux-image-raspi2              4.4.0.1052.53
  linux-image-snapdragon          4.4.0.1055.48

Ubuntu 14.04 LTS:
  linux-image-3.13.0-116-generic  3.13.0-116.163
  linux-image-3.13.0-116-generic-lpae  3.13.0-116.163
  linux-image-3.13.0-116-lowlatency  3.13.0-116.163
  linux-image-3.13.0-116-powerpc-e500  3.13.0-116.163
  linux-image-3.13.0-116-powerpc-e500mc  3.13.0-116.163
  linux-image-3.13.0-116-powerpc-smp  3.13.0-116.163
  linux-image-3.13.0-116-powerpc64-smp  3.13.0-116.163
  linux-image-generic             3.13.0.116.126
  linux-image-generic-lpae        3.13.0.116.126
  linux-image-lowlatency          3.13.0.116.126
  linux-image-powerpc-e500        3.13.0.116.126
  linux-image-powerpc-e500mc      3.13.0.116.126
  linux-image-powerpc-smp         3.13.0.116.126
  linux-image-powerpc64-smp       3.13.0.116.126

Ubuntu 12.04 LTS:
  linux-image-3.2.0-126-generic   3.2.0-126.169
  linux-image-3.2.0-126-generic-pae  3.2.0-126.169
  linux-image-3.2.0-126-highbank  3.2.0-126.169
  linux-image-3.2.0-126-omap      3.2.0-126.169
  linux-image-3.2.0-126-powerpc-smp  3.2.0-126.169
  linux-image-3.2.0-126-powerpc64-smp  3.2.0-126.169
  linux-image-3.2.0-126-virtual   3.2.0-126.169
  linux-image-3.2.0-1504-omap4    3.2.0-1504.131
  linux-image-generic             3.2.0.126.141
  linux-image-generic-pae         3.2.0.126.141
  linux-image-highbank            3.2.0.126.141
  linux-image-omap                3.2.0.126.141
  linux-image-omap4               3.2.0.1504.99
  linux-image-powerpc-smp         3.2.0.126.141
  linux-image-powerpc64-smp       3.2.0.126.141
  linux-image-virtual             3.2.0.126.141

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:
  http://www.ubuntu.com/usn/usn-3256-1
  CVE-2017-7308

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.8.0-46.49
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.8.0-1033.36
  https://launchpad.net/ubuntu/+source/linux/4.4.0-72.93
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1013.22
  https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1010.10
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1052.59
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1055.59
  https://launchpad.net/ubuntu/+source/linux/3.13.0-116.163
  https://launchpad.net/ubuntu/+source/linux/3.2.0-126.169
  https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1504.131

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