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USN-3443-3: Linux kernel (GCP) vulnerability

11 October 2017

The system could be made to crash under certain conditions.

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Releases

Packages

  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems

Details

Andrey Konovalov discovered that a divide-by-zero error existed in the TCP
stack implementation in the Linux kernel. A local attacker could use this
to cause a denial of service (system crash). (CVE-2017-14106)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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-3443-2: linux-image-4.10.0-37-lowlatency, linux-hwe, linux-image-extra-4.10.0-37-generic, linux-image-4.10.0-37-generic-lpae, linux-image-4.10.0-37-generic
  • USN-3444-2: linux-image-4.4.0-97-powerpc64-emb, linux-image-4.4.0-97-generic-lpae, linux-image-4.4.0-97-lowlatency, linux-image-extra-4.4.0-97-generic, linux-image-4.4.0-97-powerpc-smp, linux-image-4.4.0-97-generic, linux-lts-xenial, linux-image-4.4.0-97-powerpc64-smp, linux-image-4.4.0-97-powerpc-e500mc
  • USN-3444-1: linux-image-4.4.0-97-powerpc64-emb, linux-image-4.4.0-1008-kvm, linux-image-4.4.0-1032-gke, linux-snapdragon, linux-image-4.4.0-97-powerpc64-smp, linux-image-4.4.0-97-powerpc-e500mc, linux, linux-image-4.4.0-1077-snapdragon, linux-image-4.4.0-97-generic-lpae, linux-image-extra-4.4.0-1032-gke, linux-gke, linux-image-4.4.0-1075-raspi2, linux-image-4.4.0-97-lowlatency, linux-image-extra-4.4.0-97-generic, linux-image-4.4.0-97-powerpc-smp, linux-image-4.4.0-97-generic, linux-aws, linux-image-4.4.0-1038-aws, linux-raspi2, linux-kvm
  • USN-3443-1: linux-image-powerpc64-smp, linux-image-4.10.0-37-lowlatency, linux-image-powerpc-e500mc, linux-image-generic-lpae, linux-image-4.10.0-1019-raspi2, linux-image-powerpc-smp, linux-image-generic, linux-raspi2, linux-image-virtual, linux-image-powerpc64-emb, linux-image-raspi2, linux-image-4.10.0-37-generic-lpae, linux-image-4.10.0-37-generic, linux, linux-image-lowlatency
  • USN-3445-1: linux-image-extra-3.13.0-133-generic, linux-image-3.13.0-133-generic-lpae, linux-image-3.13.0-133-powerpc64-smp, linux-image-3.13.0-133-generic, linux-image-3.13.0-133-lowlatency, linux-image-3.13.0-133-powerpc-smp, linux-image-3.13.0-133-powerpc-e500, linux-image-3.13.0-133-powerpc-e500mc, linux, linux-image-3.13.0-133-powerpc64-emb
  • USN-3445-2: linux-image-3.13.0-133-generic-lpae, linux-image-3.13.0-133-generic, linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty, linux-lts-trusty

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