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=========================================================================Ubuntu Security Notice USN-3444-1
October 10, 2017

linux, linux-aws, linux-gke, linux-kvm, 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-kvm: Linux kernel for cloud environments
- linux-raspi2: Linux kernel for Raspberry Pi 2
- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

Jan H. Schönherr discovered that the Xen subsystem did not properly handle
block IO merges correctly in some situations. An attacker in a guest vm
could use this to cause a denial of service (host crash) or possibly gain
administrative privileges in the host. (CVE-2017-12134)

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)

Otto Ebeling discovered that the memory manager in the Linux kernel did not
properly check the effective UID in some situations. A local attacker could
use this to expose sensitive information. (CVE-2017-14140)

Update instructions:

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1008-kvm      4.4.0-1008.13
  linux-image-4.4.0-1032-gke      4.4.0-1032.32
  linux-image-4.4.0-1038-aws      4.4.0-1038.47
  linux-image-4.4.0-1075-raspi2   4.4.0-1075.83
  linux-image-4.4.0-1077-snapdragon  4.4.0-1077.82
  linux-image-4.4.0-97-generic    4.4.0-97.120
  linux-image-4.4.0-97-generic-lpae  4.4.0-97.120
  linux-image-4.4.0-97-lowlatency  4.4.0-97.120
  linux-image-4.4.0-97-powerpc-e500mc  4.4.0-97.120
  linux-image-4.4.0-97-powerpc-smp  4.4.0-97.120
  linux-image-4.4.0-97-powerpc64-emb  4.4.0-97.120
  linux-image-4.4.0-97-powerpc64-smp  4.4.0-97.120
  linux-image-aws                 4.4.0.1038.40
  linux-image-generic             4.4.0.97.102
  linux-image-generic-lpae        4.4.0.97.102
  linux-image-gke                 4.4.0.1032.33
  linux-image-kvm                 4.4.0.1008.8
  linux-image-lowlatency          4.4.0.97.102
  linux-image-powerpc-e500mc      4.4.0.97.102
  linux-image-powerpc-smp         4.4.0.97.102
  linux-image-powerpc64-emb       4.4.0.97.102
  linux-image-powerpc64-smp       4.4.0.97.102
  linux-image-raspi2              4.4.0.1075.75
  linux-image-snapdragon          4.4.0.1077.69

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:
  https://ubuntu.com/security/notices/USN-3444-1
  CVE-2017-12134, CVE-2017-14106, CVE-2017-14140

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.4.0-97.120
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1038.47
  https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1032.32
  https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1008.13
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1075.83
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1077.82

Ubuntu 3444-1: Linux kernel vulnerabilities

October 11, 2017
Several security issues were fixed in the Linux kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.4.0-1008-kvm 4.4.0-1008.13 linux-image-4.4.0-1032-gke 4.4.0-1032.32 linux-image-4.4.0-1038-aws 4.4.0-1038.47 linux-image-4.4.0-1075-raspi2 4.4.0-1075.83 linux-image-4.4.0-1077-snapdragon 4.4.0-1077.82 linux-image-4.4.0-97-generic 4.4.0-97.120 linux-image-4.4.0-97-generic-lpae 4.4.0-97.120 linux-image-4.4.0-97-lowlatency 4.4.0-97.120 linux-image-4.4.0-97-powerpc-e500mc 4.4.0-97.120 linux-image-4.4.0-97-powerpc-smp 4.4.0-97.120 linux-image-4.4.0-97-powerpc64-emb 4.4.0-97.120 linux-image-4.4.0-97-powerpc64-smp 4.4.0-97.120 linux-image-aws 4.4.0.1038.40 linux-image-generic 4.4.0.97.102 linux-image-generic-lpae 4.4.0.97.102 linux-image-gke 4.4.0.1032.33 linux-image-kvm 4.4.0.1008.8 linux-image-lowlatency 4.4.0.97.102 linux-image-powerpc-e500mc 4.4.0.97.102 linux-image-powerpc-smp 4.4.0.97.102 linux-image-powerpc64-emb 4.4.0.97.102 linux-image-powerpc64-smp 4.4.0.97.102 linux-image-raspi2 4.4.0.1075.75 linux-image-snapdragon 4.4.0.1077.69 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

https://ubuntu.com/security/notices/USN-3444-1

CVE-2017-12134, CVE-2017-14106, CVE-2017-14140

Severity
October 10, 2017

Package Information

https://launchpad.net/ubuntu/+source/linux/4.4.0-97.120 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1038.47 https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1032.32 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1008.13 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1075.83 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1077.82

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