1. Ubuntu Security Notices
  2. USN-3385-1

USN-3385-1: Linux kernel vulnerabilities

Publication date

11 August 2017

Overview

Several security issues were fixed in the Linux kernel.

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

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)

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

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
16.04 xenial 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

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References

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