=========================================================================
Ubuntu Security Notice USN-3849-1
December 20, 2018

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

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that a NULL pointer dereference existed in the keyring
subsystem of the Linux kernel. A local attacker could use this to cause a
denial of service (system crash). (CVE-2017-2647)

It was discovered that a race condition existed in the raw MIDI driver for
the Linux kernel, leading to a double free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2018-10902)

It was discovered that an integer overrun vulnerability existed in the
POSIX timers implementation in the Linux kernel. A local attacker could use
this to cause a denial of service. (CVE-2018-12896)

Noam Rathaus discovered that a use-after-free vulnerability existed in the
Infiniband implementation in the Linux kernel. An attacker could use this
to cause a denial of service (system crash). (CVE-2018-14734)

It was discovered that the YUREX USB device driver for the Linux kernel did
not properly restrict user space reads or writes. A physically proximate
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2018-16276)

Tetsuo Handa discovered a logic error in the TTY subsystem of the Linux
kernel. A local attacker with access to pseudo terminal devices could use
this to cause a denial of service. (CVE-2018-18386)

Kanda Motohiro discovered that writing extended attributes to an XFS file
system in the Linux kernel in certain situations could cause an error
condition to occur. A local attacker could use this to cause a denial of
service. (CVE-2018-18690)

It was discovered that an integer overflow vulnerability existed in the
CDROM driver of the Linux kernel. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2018-18710)

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-164-generic  3.13.0-164.214
  linux-image-3.13.0-164-generic-lpae  3.13.0-164.214
  linux-image-3.13.0-164-lowlatency  3.13.0-164.214
  linux-image-3.13.0-164-powerpc-e500  3.13.0-164.214
  linux-image-3.13.0-164-powerpc-e500mc  3.13.0-164.214
  linux-image-3.13.0-164-powerpc-smp  3.13.0-164.214
  linux-image-3.13.0-164-powerpc64-emb  3.13.0-164.214
  linux-image-3.13.0-164-powerpc64-smp  3.13.0-164.214
  linux-image-generic             3.13.0.164.174
  linux-image-generic-lpae        3.13.0.164.174
  linux-image-lowlatency          3.13.0.164.174
  linux-image-powerpc-e500        3.13.0.164.174
  linux-image-powerpc-e500mc      3.13.0.164.174
  linux-image-powerpc-smp         3.13.0.164.174
  linux-image-powerpc64-emb       3.13.0.164.174
  linux-image-powerpc64-smp       3.13.0.164.174

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://usn.ubuntu.com/usn/usn-3849-1
  CVE-2017-2647, CVE-2018-10902, CVE-2018-12896, CVE-2018-14734,
  CVE-2018-16276, CVE-2018-18386, CVE-2018-18690, CVE-2018-18710

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.13.0-164.214