USN-3385-1: Linux kernel vulnerabilities

11 August 2017

linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities

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

  • 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 - Linux kernel for Google Container Engine (GKE) systems
  • linux-raspi2 - Linux kernel for Raspberry Pi 2
  • linux-snapdragon - Linux kernel for Snapdragon processors

Details

Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload (UFO) code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. (CVE-2017-1000112)

Andrey Konovalov discovered a race condition in AF_PACKET socket option handling code in the Linux kernel. A local unprivileged attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2017-1000111)

Update instructions

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

Ubuntu 16.04 LTS
linux-image-4.4.0-1026-gke - 4.4.0-1026.26
linux-image-4.4.0-1030-aws - 4.4.0-1030.39
linux-image-4.4.0-1069-raspi2 - 4.4.0-1069.77
linux-image-4.4.0-1071-snapdragon - 4.4.0-1071.76
linux-image-4.4.0-91-generic - 4.4.0-91.114
linux-image-4.4.0-91-generic-lpae - 4.4.0-91.114
linux-image-4.4.0-91-lowlatency - 4.4.0-91.114
linux-image-4.4.0-91-powerpc-e500mc - 4.4.0-91.114
linux-image-4.4.0-91-powerpc-smp - 4.4.0-91.114
linux-image-4.4.0-91-powerpc64-emb - 4.4.0-91.114
linux-image-4.4.0-91-powerpc64-smp - 4.4.0-91.114
linux-image-aws - 4.4.0.1030.32
linux-image-generic - 4.4.0.91.96
linux-image-generic-lpae - 4.4.0.91.96
linux-image-gke - 4.4.0.1026.27
linux-image-lowlatency - 4.4.0.91.96
linux-image-powerpc-e500mc - 4.4.0.91.96
linux-image-powerpc-smp - 4.4.0.91.96
linux-image-powerpc64-emb - 4.4.0.91.96
linux-image-powerpc64-smp - 4.4.0.91.96
linux-image-raspi2 - 4.4.0.1069.69
linux-image-snapdragon - 4.4.0.1071.63

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