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Ubuntu 16.04 LTS: USN-3364-1 Critical: Kernel Info Exposure and DoS

ubuntu
Calendar Grey July 24, 2017
Dist Ubuntu Esm H88
Updates for Ubuntu Security Notice USN-3364-1 addressing kernel issues disrupting sensitive data access and Denial of Service risks.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-raspi2: Linux kernel for Raspberry Pi 2

- linux-snapdragon: Linux kernel for Snapdragon processors

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 denial ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical ubuntu linux kernel update doS issue kernel information exposure

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1065-raspi2   4.4.0-1065.73
  linux-image-4.4.0-1067-snapdragon  4.4.0-1067.72
  linux-image-4.4.0-87-generic    4.4.0-87.110
  linux-image-4.4.0-87-generic-lpae  4.4.0-87.110
  linux-image-4.4.0-87-lowlatency  4.4.0-87.110
  linux-image-4.4.0-87-powerpc-e500mc  4.4.0-87.110
  linux-image-4.4.0-87-powerpc-smp  4.4.0-87.110
  linux-image-4.4.0-87-powerpc64-emb  4.4.0-87.110
  linux-image-4.4.0-87-powerpc64-smp  4.4.0-87.110
  linux-image-generic             4.4.0.87.93
  linux-image-generic-lpae        4.4.0.87.93
  linux-image-lowlatency          4.4.0.87.93
  linux-image-powerpc-e500mc      4.4.0.87.93
  linux-image-powerpc-smp         4.4.0.87.93
  linux-image-powerpc64-emb       4.4.0.87.93
  linux-image-powerpc64-smp       4.4.0.87.93
  linux-image-raspi2              4.4.0.1065.66
  linux-image-snapdragon          4.4.0.1067.60

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-3364-1

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 24, 2017

Topics%20covered

Topics Covered

security advisory critical ubuntu linux kernel update doS issue kernel information exposure

Package Information

https://launchpad.net/ubuntu/+source/linux/4.4.0-87.110
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1065.73
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1067.72

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