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Ubuntu 16.10 USN-3209-1 Moderate: Kernel Denial of Service Vulnerabilities

ubuntu
Calendar Grey February 22, 2017
Dist Ubuntu Esm H88
Numerous corrections were implemented in the kernel for Ubuntu 16.10. It’s recommended to upgrade to the most recent image versions to enhance security and stability.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

It was discovered that the generic SCSI block layer in the Linux kernel did

not properly restrict write operations in certain situations. A local

attacker could use this to cause a denial of service (system crash) or

possibly gain administrative privileges. (CVE-2016-10088)

Jim Mattson discovered that the KVM implementation in the Linux kernel

mismanages the #BP and #OF exceptions. A local attacker in a guest virtual

machine could use this to cause a denial of service (guest OS crash).

(CVE-2016-9588)

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 denial service moderate threat kernel system update ubuntu administrative privileges

Update Instructions

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

Ubuntu 16.10:
  linux-image-4.8.0-1026-raspi2   4.8.0-1026.29
  linux-image-4.8.0-39-generic    4.8.0-39.42
  linux-image-4.8.0-39-generic-lpae  4.8.0-39.42
  linux-image-4.8.0-39-lowlatency  4.8.0-39.42
  linux-image-4.8.0-39-powerpc-e500mc  4.8.0-39.42
  linux-image-4.8.0-39-powerpc-smp  4.8.0-39.42
  linux-image-4.8.0-39-powerpc64-emb  4.8.0-39.42
  linux-image-generic             4.8.0.39.50
  linux-image-generic-lpae        4.8.0.39.50
  linux-image-lowlatency          4.8.0.39.50
  linux-image-powerpc-e500mc      4.8.0.39.50
  linux-image-powerpc-smp         4.8.0.39.50
  linux-image-powerpc64-emb       4.8.0.39.50
  linux-image-raspi2              4.8.0.1026.29

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-3209-1

CVE-2016-10088, CVE-2016-9588, CVE-2017-6074

February 22, 2017

Topics%20covered

Topics Covered

security advisory denial service moderate threat kernel system update ubuntu administrative privileges

Package Information

https://launchpad.net/ubuntu/+source/linux/4.8.0-39.42
https://launchpad.net/ubuntu/+source/linux-raspi2/4.8.0-1026.29

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