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Ubuntu 16.04 LTS USN-3384-2: Kernel DoS Threat Advisory

ubuntu
Calendar Grey August 11, 2017
Dist Ubuntu Esm H88
Multiple vulnerabilities addressed in Ubuntu's HWE kernel updates as per USN-3384-2, released on August 11, 2017.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

Details:

USN-3384-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04.

This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 17.04 for Ubuntu

16.04 LTS.

Andrey Konovalov discovered a race condition in the UDP Fragmentation

Offload (UFO) code in the Linux kernel. A local attacker could use this to

cause a denial of service or execute arbitrary code. (CVE-2017-1000112)

Andrey Konovalov discovered a race condition in AF_PACKET socket option

handling code in the Linux kernel. A local unprivileged attacker could use

this to cause a denial of service or possibly execute arbitrary code.

(CVE-2017-1000111)

Topics%20covered

Topics Covered

security advisory update kernel ubuntu dos linux-hwe

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.10.0-32-generic   4.10.0-32.36~16.04.1
  linux-image-4.10.0-32-generic-lpae  4.10.0-32.36~16.04.1
  linux-image-4.10.0-32-lowlatency  4.10.0-32.36~16.04.1
  linux-image-generic-hwe-16.04   4.10.0.32.34
  linux-image-generic-lpae-hwe-16.04  4.10.0.32.34
  linux-image-lowlatency-hwe-16.04  4.10.0.32.34

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-3384-2

https://ubuntu.com/security/notices/USN-3384-1

CVE-2017-1000111, CVE-2017-1000112

Severity
critical
Lowest
Low
Medium
High
Critical

August 11, 2017

Topics%20covered

Topics Covered

security advisory update kernel ubuntu dos linux-hwe

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe/4.10.0-32.36~16.04.1

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