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Ubuntu 16.10 USN-3162-1: Kernel Crash Due To DoS Threats

ubuntu
Calendar Grey December 20, 2016
Scroller Ubuntu
A range of vulnerabilities in the Ubuntu kernel has been resolved. Ensure your system is updated for essential patches by December 20, 2016.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

CAI Qian discovered that shared bind mounts in a mount namespace

exponentially added entries without restriction to the Linux kernel's mount

table. A local attacker could use this to cause a denial of service (system

crash). (CVE-2016-6213)

It was discovered that the KVM implementation for x86/x86_64 in the Linux

kernel could dereference a null pointer. An attacker in a guest virtual

machine could use this to cause a denial of service (system crash) in the

KVM host. (CVE-2016-8630)

Eyal Itkin discovered that the IP over IEEE 1394 (FireWire) implementation

in the Linux kernel contained a buffer overflow when handling fragmented

packets. A remote attacker could use this to possibly execute arbitrary

code with administrative privileges. (CVE-2016-8633)

Marco Grassi discovered that the TCP implementation in the Linux kernel

mishandles socket buffer (skb) truncation. A local atta...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory DoS Ubuntu kernel system crash

Update Instructions

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

Ubuntu 16.10:
  linux-image-4.8.0-32-generic    4.8.0-32.34
  linux-image-4.8.0-32-generic-lpae  4.8.0-32.34
  linux-image-4.8.0-32-lowlatency  4.8.0-32.34
  linux-image-4.8.0-32-powerpc-e500mc  4.8.0-32.34
  linux-image-4.8.0-32-powerpc-smp  4.8.0-32.34
  linux-image-4.8.0-32-powerpc64-emb  4.8.0-32.34
  linux-image-generic             4.8.0.32.41
  linux-image-generic-lpae        4.8.0.32.41
  linux-image-lowlatency          4.8.0.32.41
  linux-image-powerpc-e500mc      4.8.0.32.41
  linux-image-powerpc-smp         4.8.0.32.41
  linux-image-powerpc64-emb       4.8.0.32.41

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-3162-1

CVE-2016-6213, CVE-2016-8630, CVE-2016-8633, CVE-2016-8645,

CVE-2016-9313, CVE-2016-9555

Severity
important
Lowest
Low
Medium
High
Critical

December 20, 2016

Topics%20covered

Topics Covered

security advisory DoS Ubuntu kernel system crash

Package Information

https://launchpad.net/ubuntu/+source/linux/4.8.0-32.34

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