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Ubuntu 16.04 LTS USN-3617-2 Moderate: Linux HWE Denial Of Service

ubuntu
Calendar Grey April 3, 2018
Scroller Ubuntu Esm H88
This announcement outlines various resolved problems in Ubuntu's hardware enablement (HWE) kernel, addressing vulnerabilities and potential threats of service disruptions.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

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

- linux-oem: Linux kernel for OEM processors

Details:

USN-3617-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.10.

This update provides the corresponding updates for the Linux Hardware

Enablement (HWE) kernel from Ubuntu 17.10 for Ubuntu 16.04 LTS.

It was discovered that a race condition leading to a use-after-free

vulnerability existed in the ALSA PCM subsystem of the Linux kernel. A

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

or possibly execute arbitrary code. (CVE-2017-0861)

It was discovered that the KVM implementation in the Linux kernel allowed

passthrough of the diagnostic I/O port 0x80. An attacker in a guest VM

could use this to cause a denial of service (system crash) in the host OS.

(CVE-2017-1000407)

It was ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu Linux kernel HWE kernel

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.13.0-1012-gcp     4.13.0-1012.16
  linux-image-4.13.0-1022-oem     4.13.0-1022.24
  linux-image-4.13.0-38-generic   4.13.0-38.43~16.04.1
  linux-image-4.13.0-38-generic-lpae  4.13.0-38.43~16.04.1
  linux-image-4.13.0-38-lowlatency  4.13.0-38.43~16.04.1
  linux-image-gcp                 4.13.0.1012.14
  linux-image-generic-hwe-16.04   4.13.0.38.57
  linux-image-generic-lpae-hwe-16.04  4.13.0.38.57
  linux-image-gke                 4.13.0.1012.14
  linux-image-lowlatency-hwe-16.04  4.13.0.38.57
  linux-image-oem                 4.13.0.1022.26

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-3617-2

https://ubuntu.com/security/notices/USN-3617-1

CVE-2017-0861, CVE-2017-1000407, CVE-2017-15129, CVE-2017-16532,

CVE-2017-16537, CVE-2017-16645, CVE-2017-16646, CVE-2017-16647,

CVE-2017-16649, CVE-2017-16650, CVE-2017-16994, CVE-2017-17448,

CVE-2017-17450, CVE-2017-17741, CVE-2017-17805, CVE-2017-17806,

CVE-2017-17807, CVE-2017-18204, CVE-2018-1000026, CVE-2018-5332,

CVE-2018-5333, CVE-2018-5344

Severity
important
Lowest
Low
Medium
High
Critical

April 03, 2018

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu Linux kernel HWE kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp/4.13.0-1012.16
https://launchpad.net/ubuntu/+source/linux-hwe/4.13.0-38.43~16.04.1
https://launchpad.net/ubuntu/+source/linux-oem/4.13.0-1022.24

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