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Ubuntu 14.04 LTS: USN-3208-2 Critical Kernel Denial Of Service Issues

ubuntu
Calendar Grey February 22, 2017
Dist Ubuntu Esm H88
A variety of vulnerabilities resolved in Linux kernel for Ubuntu 14.04 LTS. Upgrade your firmware for improved security.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-3208-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu

14.04 LTS.

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)

CAI Qian discovered that the sysctl implementation in the Linux kernel did

not properly perform reference counting in some situations. An unprivileged

attacker could use this to cause a denial of service (system hang).

(CVE-2016-9191)

Jim Mattson discovered that the KVM implementation in the Linux kernel

mismanages the #BP and #OF exceptions. ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service system update kernel issue ubuntu administrative privileges

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-4.4.0-64-generic    4.4.0-64.85~14.04.1
  linux-image-4.4.0-64-generic-lpae  4.4.0-64.85~14.04.1
  linux-image-4.4.0-64-lowlatency  4.4.0-64.85~14.04.1
  linux-image-4.4.0-64-powerpc-e500mc  4.4.0-64.85~14.04.1
  linux-image-4.4.0-64-powerpc-smp  4.4.0-64.85~14.04.1
  linux-image-4.4.0-64-powerpc64-emb  4.4.0-64.85~14.04.1
  linux-image-4.4.0-64-powerpc64-smp  4.4.0-64.85~14.04.1
  linux-image-generic-lpae-lts-xenial  4.4.0.64.50
  linux-image-generic-lts-xenial  4.4.0.64.50
  linux-image-lowlatency-lts-xenial  4.4.0.64.50
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.64.50
  linux-image-powerpc-smp-lts-xenial  4.4.0.64.50
  linux-image-powerpc64-emb-lts-xenial  4.4.0.64.50
  linux-image-powerpc64-smp-lts-xenial  4.4.0.64.50

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-3208-2

https://ubuntu.com/security/notices/USN-3208-1

CVE-2016-10088, CVE-2016-9191, CVE-2016-9588, CVE-2017-2583,

CVE-2017-2584, CVE-2017-5549, CVE-2017-6074

Severity
critical
Lowest
Low
Medium
High
Critical

February 22, 2017

Topics%20covered

Topics Covered

security advisory denial of service system update kernel issue ubuntu administrative privileges

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-64.85~14.04.1

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