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Ubuntu 14.04 LTS: USN-3525-1 Moderate: Kernel Vulnerability Concerns

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Calendar Grey December 8, 2017
Scroller Ubuntu
Numerous vulnerabilities addressed in Ubuntu's kernel that may result in crashes or security breaches. Ensure to update immediately!
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

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)

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code execution Ubuntu kernel system crash

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-137-generic  3.13.0-137.186
  linux-image-3.13.0-137-generic-lpae  3.13.0-137.186
  linux-image-3.13.0-137-lowlatency  3.13.0-137.186
  linux-image-3.13.0-137-powerpc-e500  3.13.0-137.186
  linux-image-3.13.0-137-powerpc-e500mc  3.13.0-137.186
  linux-image-3.13.0-137-powerpc-smp  3.13.0-137.186
  linux-image-3.13.0-137-powerpc64-emb  3.13.0-137.186
  linux-image-3.13.0-137-powerpc64-smp  3.13.0-137.186
  linux-image-generic             3.13.0.137.146
  linux-image-generic-lpae        3.13.0.137.146
  linux-image-lowlatency          3.13.0.137.146
  linux-image-powerpc-e500        3.13.0.137.146
  linux-image-powerpc-e500mc      3.13.0.137.146
  linux-image-powerpc-smp         3.13.0.137.146
  linux-image-powerpc64-emb       3.13.0.137.146
  linux-image-powerpc64-smp       3.13.0.137.146

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-3510-1

CVE-2017-1000405, CVE-2017-16939

December 08, 2017

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code execution Ubuntu kernel system crash

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-137.186

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