USN-3249-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3249-1

29th March, 2017

linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerability

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

Ubuntu 16.04 LTS

Summary

The system could be made to crash or run programs as an administrator.

Software description

linux
– Linux kernel
linux-aws
– Linux kernel for Amazon Web Services (AWS) systems
linux-gke
– Linux kernel for Google Container Engine (GKE) systems
linux-raspi2
– Linux kernel for Raspberry Pi 2
linux-snapdragon
– Linux kernel for Snapdragon Processors

Details

It was discovered that the xfrm framework for transforming packets in the
Linux kernel did not properly validate data received from user space. A
local attacker could use this to cause a denial of service (system crash)
or execute arbitrary code with administrative privileges.

Update instructions

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

Ubuntu 16.04 LTS:: linux-image-gke 4.4.0.1009.11; linux-image-powerpc-e500mc 4.4.0.71.77; linux-image-4.4.0-1054-snapdragon

4.4.0-1054.58; linux-image-raspi2 4.4.0.1051.52; linux-image-powerpc-smp 4.4.0.71.77; linux-image-4.4.0-71-lowlatency

4.4.0-71.92; linux-image-generic 4.4.0.71.77; linux-image-4.4.0-71-powerpc-smp

4.4.0-71.92; linux-image-4.4.0-71-powerpc-e500mc

4.4.0-71.92; linux-image-4.4.0-71-generic

4.4.0-71.92; linux-image-4.4.0-71-powerpc64-smp

4.4.0-71.92; linux-image-4.4.0-1051-raspi2

4.4.0-1051.58; linux-image-generic-lpae 4.4.0.71.77; linux-image-snapdragon 4.4.0.1054.47; linux-image-aws 4.4.0.1012.15; linux-image-4.4.0-1012-aws

4.4.0-1012.21; linux-image-4.4.0-71-generic-lpae

4.4.0-71.92; linux-image-lowlatency 4.4.0.71.77; linux-image-4.4.0-1009-gke

4.4.0-1009.9; linux-image-powerpc64-smp 4.4.0.71.77

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-7184

Source: USN-3249-1: Linux kernel vulnerability

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