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Ubuntu 16.04 LTS: USN-3364-3 Critical: linux-aws, linux-gke Attack Risks

ubuntu
Calendar Grey July 25, 2017
Dist Ubuntu Esm H88
Corrections for various vulnerabilities in the Linux kernel for AWS and GKE running on Ubuntu 16.04 LTS, mitigating threats from potential local intruders.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

Details:

It was discovered that the Linux kernel did not properly initialize a Wake-

on-Lan data structure. A local attacker could use this to expose sensitive

information (kernel memory). (CVE-2014-9900)

It was discovered that the Linux kernel did not properly restrict access to

/proc/iomem. A local attacker could use this to expose sensitive

information. (CVE-2015-8944)

Alexander Potapenko discovered a race condition in the Advanced Linux Sound

Architecture (ALSA) subsystem in the Linux kernel. A local attacker could

use this to expose sensitive information (kernel memory).

(CVE-2017-1000380)

Li Qiang discovered that the DRM driver for VMware Virtual GPUs in the

Linux kernel did not properly validate some ioctl arguments. A local

attacker could use this to cause a den...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu sensitive information exposure linux-aws linux-gke

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1022-gke      4.4.0-1022.22
  linux-image-4.4.0-1026-aws      4.4.0-1026.35
  linux-image-aws                 4.4.0.1026.29
  linux-image-gke                 4.4.0.1022.24

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-3364-3

https://ubuntu.com/security/notices/USN-3364-1

CVE-2014-9900, CVE-2015-8944, CVE-2017-1000380, CVE-2017-7346,

CVE-2017-9150, CVE-2017-9605

Severity
critical
Lowest
Low
Medium
High
Critical

July 25, 2017

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu sensitive information exposure linux-aws linux-gke

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1026.35
https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1022.22

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