Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 438
Alerts This Week
Warning Icon 1 438

Ubuntu 16.04 LTS USN-3256-2 Critical: HWE Kernel DoS Issue

ubuntu
Calendar Grey April 5, 2017
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
The system could be made to crash under certain conditions.

Summary

The system could be made to crash under certain conditions.

Software Description:

- linux-hwe: Linux hardware enablement (HWE) kernel

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

- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise

Details:

USN-3256-1 fixed vulnerabilities in the Linux kernel for Ubuntu

14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. This update provides

the corresponding updates for the Linux Hardware Enablement (HWE)

kernel for each of the respective prior Ubuntu LTS releases.

Andrey Konovalov discovered that the AF_PACKET implementation in the Linux

kernel did not properly validate certain block-size data. A local attacker

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

Topics%20covered

Topics Covered

security advisory denial of service kernel update critical ubuntu

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.8.0-46-generic    4.8.0-46.49~16.04.1
  linux-image-4.8.0-46-generic-lpae  4.8.0-46.49~16.04.1
  linux-image-4.8.0-46-lowlatency  4.8.0-46.49~16.04.1
  linux-image-generic-hwe-16.04   4.8.0.46.18
  linux-image-generic-lpae-hwe-16.04  4.8.0.46.18
  linux-image-lowlatency-hwe-16.04  4.8.0.46.18

Ubuntu 14.04 LTS:
  linux-image-4.4.0-72-generic    4.4.0-72.93~14.04.1
  linux-image-4.4.0-72-generic-lpae  4.4.0-72.93~14.04.1
  linux-image-4.4.0-72-lowlatency  4.4.0-72.93~14.04.1
  linux-image-4.4.0-72-powerpc-e500mc  4.4.0-72.93~14.04.1
  linux-image-4.4.0-72-powerpc-smp  4.4.0-72.93~14.04.1
  linux-image-4.4.0-72-powerpc64-smp  4.4.0-72.93~14.04.1
  linux-image-generic-lpae-lts-xenial  4.4.0.72.59
  linux-image-generic-lts-xenial  4.4.0.72.59
  linux-image-lowlatency-lts-xenial  4.4.0.72.59
  linux-image-powerpc-e500mc-lts-xenial  4.4.0.72.59
  linux-image-powerpc-smp-lts-xenial  4.4.0.72.59
  linux-image-powerpc64-smp-lts-xenial  4.4.0.72.59

Ubuntu 12.04 LTS:
  linux-image-3.13.0-116-generic  3.13.0-116.163~precise1
  linux-image-3.13.0-116-generic-lpae  3.13.0-116.163~precise1
  linux-image-generic-lpae-lts-trusty  3.13.0.116.107
  linux-image-generic-lts-trusty  3.13.0.116.107

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-3256-2

https://ubuntu.com/security/notices/USN-3256-1

CVE-2017-7308

Severity
critical
Lowest
Low
Medium
High
Critical

April 05, 2017

Topics%20covered

Topics Covered

security advisory denial of service kernel update critical ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe/4.8.0-46.49~16.04.1
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-72.93~14.04.1
https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-116.163~precise1

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.