USN-3371-1: Linux kernel (HWE) kernel vulnerabilities

Ubuntu Security Notice USN-3371-1

28th July, 2017

linux-hwe vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

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

Details

It was discovered that the Linux kernel did not properly initialize a Wake-
on-Lan data structure. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2014-9900)

Alexander Potapenko discovered a race condition in the Advanced Linux Sound
Architecture (ALSA) subsystem in the Linux kernel. A local attacker could
use this to expose sensitive information (kernel memory).
(CVE-2017-1000380)

Li Qiang discovered that the DRM driver for VMware Virtual GPUs in the
Linux kernel did not properly validate some ioctl arguments. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2017-7346)

Murray McAllister discovered that the DRM driver for VMware Virtual GPUs in
the Linux kernel did not properly initialize memory. A local attacker could
use this to expose sensitive information (kernel memory). (CVE-2017-9605)

Update instructions

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

Ubuntu 16.04 LTS:
linux-image-4.10.0-28-lowlatency 4.10.0-28.32~16.04.2
linux-image-lowlatency-hwe-16.04 4.10.0.28.31
linux-image-4.10.0-28-generic 4.10.0-28.32~16.04.2
linux-image-generic-hwe-16.04 4.10.0.28.31
linux-image-4.10.0-28-generic-lpae 4.10.0-28.32~16.04.2
linux-image-generic-lpae-hwe-16.04 4.10.0.28.31

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2014-9900, CVE-2017-1000380, CVE-2017-7346, CVE-2017-9605