Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 464
Alerts This Week
Warning Icon 1 464

Ubuntu 16.04 LTS USN-3468-3 Critical: Linux Kernel GCP Security Issues

ubuntu
Calendar Grey October 31, 2017
Scroller Ubuntu
=========================================================================Ubuntu Security Notice USN-
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

Details:

It was discovered that the KVM subsystem in the Linux kernel did not

properly bound guest IRQs. A local attacker in a guest VM could use this to

cause a denial of service (host system crash). (CVE-2017-1000252)

It was discovered that the Flash-Friendly File System (f2fs) implementation

in the Linux kernel did not properly validate superblock metadata. A local

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

possibly execute arbitrary code. (CVE-2017-10663)

Anthony Perard discovered that the Xen virtual block driver did not

properly initialize some data structures before passing them to user space.

A local attacker in a guest VM could use this to expose sensitive

information from the host OS or other guest VMs. (CVE-2017-10911)

It was discovered that a use-after-free vulnerability existed in the POSIX

mes...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical update instructions linux-gcp

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.10.0-1008-gcp     4.10.0-1008.8
  linux-image-gcp                 4.10.0.1008.10

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-3468-3

https://ubuntu.com/security/notices/USN-3468-1

CVE-2017-1000252, CVE-2017-10663, CVE-2017-10911, CVE-2017-11176,

CVE-2017-14340

Severity
critical
Lowest
Low
Medium
High
Critical

October 31, 2017

Topics%20covered

Topics Covered

security advisory denial of service critical update instructions linux-gcp

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp/4.10.0-1008.8

Get the latest News and Insights

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