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Ubuntu 14.04 LTS: USN-3207-1 Moderate Use-After-Free Threat

ubuntu
Calendar Grey February 22, 2017
Dist Ubuntu Esm H88
Essential upgrade for Ubuntu rectifies kernel problems, specifically addressing use-after-free flaws that could result in possible denial-of-service exploits.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

It was discovered that a use-after-free vulnerability existed in the block

device layer of the Linux kernel. A local attacker could use this to cause

a denial of service (system crash) or possibly gain administrative

privileges. (CVE-2016-7910)

Dmitry Vyukov discovered a use-after-free vulnerability in the

sys_ioprio_get() function in the Linux kernel. A local attacker could use

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

administrative privileges. (CVE-2016-7911)

Andrey Konovalov discovered a use-after-free vulnerability in the DCCP

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

cause a denial of service (system crash) or possibly gain administrative

privileges. (CVE-2017-6074)

Topics%20covered

Topics Covered

security advisory kernel system update ubuntu use-after-free doS threat

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-110-generic  3.13.0-110.157
  linux-image-3.13.0-110-generic-lpae  3.13.0-110.157
  linux-image-3.13.0-110-lowlatency  3.13.0-110.157
  linux-image-3.13.0-110-powerpc-e500  3.13.0-110.157
  linux-image-3.13.0-110-powerpc-e500mc  3.13.0-110.157
  linux-image-3.13.0-110-powerpc-smp  3.13.0-110.157
  linux-image-3.13.0-110-powerpc64-emb  3.13.0-110.157
  linux-image-3.13.0-110-powerpc64-smp  3.13.0-110.157
  linux-image-generic             3.13.0.110.118
  linux-image-generic-lpae        3.13.0.110.118
  linux-image-highbank            3.13.0.110.118
  linux-image-lowlatency          3.13.0.110.118
  linux-image-powerpc-e500        3.13.0.110.118
  linux-image-powerpc-e500mc      3.13.0.110.118
  linux-image-powerpc-smp         3.13.0.110.118
  linux-image-powerpc64-emb       3.13.0.110.118
  linux-image-powerpc64-smp       3.13.0.110.118

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-3207-1

CVE-2016-7910, CVE-2016-7911, CVE-2017-6074

February 22, 2017

Topics%20covered

Topics Covered

security advisory kernel system update ubuntu use-after-free doS threat

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-110.157

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