USN-3249-1: Linux kernel vulnerability

29 March 2017

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

Releases

Packages

  • 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 versions:

Ubuntu 16.04

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

Related notices

  • USN-3248-1: linux-image-generic, linux-image-omap4, linux-image-powerpc64-smp, linux-image-3.2.0-125-highbank, linux, linux-image-3.2.0-125-virtual, linux-image-3.2.0-125-powerpc-smp, linux-image-3.2.0-125-omap, linux-image-generic-pae, linux-image-powerpc-smp, linux-image-3.2.0-125-powerpc64-smp, linux-image-omap, linux-image-3.2.0-125-generic-pae, linux-ti-omap4, linux-image-3.2.0-1503-omap4, linux-image-highbank, linux-image-virtual, linux-image-3.2.0-125-generic
  • USN-3249-2: linux-image-powerpc64-smp-lts-xenial, linux-lts-xenial, linux-image-4.4.0-71-generic, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-71-lowlatency, linux-image-generic-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-71-powerpc-smp, linux-image-4.4.0-71-powerpc-e500mc, linux-image-4.4.0-71-powerpc64-smp, linux-image-4.4.0-71-generic-lpae, linux-image-lowlatency-lts-xenial, linux-image-generic-lpae-lts-xenial
  • USN-3250-1: linux-image-3.13.0-115-powerpc-e500, linux-image-generic-lpae, linux-image-powerpc64-smp, linux, linux-image-3.13.0-115-generic-lpae, linux-image-3.13.0-115-powerpc64-smp, linux-image-3.13.0-115-powerpc-e500mc, linux-image-powerpc-smp, linux-image-3.13.0-115-lowlatency, linux-image-3.13.0-115-generic, linux-image-lowlatency, linux-image-powerpc-e500mc, linux-image-3.13.0-115-powerpc-smp, linux-image-generic, linux-image-powerpc-e500
  • USN-3250-2: linux-image-3.13.0-115-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-115-generic, linux-image-generic-lts-trusty, linux-lts-trusty
  • USN-3251-1: linux-image-generic-lpae, linux-image-4.8.0-45-powerpc-smp, linux, linux-image-4.8.0-45-generic-lpae, linux-image-4.8.0-1032-raspi2, linux-image-4.8.0-45-powerpc-e500mc, linux-image-powerpc-smp, linux-image-4.8.0-45-lowlatency, linux-image-lowlatency, linux-image-4.8.0-45-generic, linux-image-raspi2, linux-image-powerpc-e500mc, linux-image-generic, linux-raspi2
  • USN-3251-2: linux-image-generic-hwe-16.04, linux-hwe, linux-image-4.8.0-45-generic-lpae, linux-image-4.8.0-45-lowlatency, linux-image-generic-lpae-hwe-16.04, linux-image-lowlatency-hwe-16.04, linux-image-4.8.0-45-generic