Alerts This Week
Warning Icon 1 640
Alerts This Week
Warning Icon 1 640

Ubuntu 16.04 LTS USN-3377-2 Critical: Kernel HWE Security Threats

ubuntu
Calendar Grey August 3, 2017
Dist Ubuntu Esm H88
Crucial Ubuntu refresh addresses multiple HWE kernel issues, improving safety and reinforcing overall system reliability.
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-3377-1 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.

Fan Wu and Shixiong Zhao discovered a race condition between inotify events

and vfs rename operations in the Linux kernel. An unprivileged local

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

execute arbitrary code. (CVE-2017-7533)

It was discovered that the Linux kernel did not properly restrict

RLIMIT_STACK size. A local attacker could use this in conjunction with

another vulnerability to possibly execute arbitrary code.

(CVE-2017-1000365)

李强 discovered that the Virtio GPU driver in the Linux kernel did not

properly free memory in some situations. A local attacker could use this to

ca...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code execution kernel ubuntu system crash hwe

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.10.0-30-generic   4.10.0-30.34~16.04.1
  linux-image-4.10.0-30-generic-lpae  4.10.0-30.34~16.04.1
  linux-image-4.10.0-30-lowlatency  4.10.0-30.34~16.04.1
  linux-image-generic-hwe-16.04   4.10.0.30.33
  linux-image-generic-lpae-hwe-16.04  4.10.0.30.33
  linux-image-lowlatency-hwe-16.04  4.10.0.30.33

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-3377-2

https://ubuntu.com/security/notices/USN-3377-1

CVE-2017-1000365, CVE-2017-10810, CVE-2017-7482, CVE-2017-7533

Severity
critical
Lowest
Low
Medium
High
Critical

August 03, 2017

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code execution kernel ubuntu system crash hwe

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe/4.10.0-30.34~16.04.1

Get the latest News and Insights

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

Your message here