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Ubuntu 16.04 LTS USN-3508-2 Moderate: Linux Kernel HWE Threats

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Calendar Grey December 8, 2017
Scroller Ubuntu
Numerous significant challenges were addressed in the hardware compatibility kernel for Ubuntu 16.04 LTS.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-3508-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04.

This update provides the corresponding updates for the Linux Hardware

Enablement (HWE) kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS.

Mohamed Ghannam discovered that a use-after-free vulnerability existed in

the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could

use this to cause a denial of service (system crash) or possibly execute

arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-

write of transparent huge pages. A local attacker could use this to cause a

denial of service (application crashes) or possibly gain administrative

privileges. (CVE-2017-1000405)

Yonggang Guo discovered that a race condition existed in the driver

subsystem in the Linux kernel. A local attacker could use this to possibly

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update local attack ubuntu hwe

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.10.0-42-generic   4.10.0-42.46~16.04.1
  linux-image-4.10.0-42-generic-lpae  4.10.0-42.46~16.04.1
  linux-image-4.10.0-42-lowlatency  4.10.0-42.46~16.04.1
  linux-image-generic-hwe-16.04   4.10.0.42.44
  linux-image-generic-lpae-hwe-16.04  4.10.0.42.44
  linux-image-lowlatency-hwe-16.04  4.10.0.42.44

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-3508-2

https://ubuntu.com/security/notices/USN-3508-1

CVE-2017-1000405, CVE-2017-12146, CVE-2017-16939

December 07, 2017

Topics%20covered

Topics Covered

security advisory denial of service kernel update local attack ubuntu hwe

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe/4.10.0-42.46~16.04.1

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