The following updates has been released for Ubuntu Linux:

USN-3814-1: libmspack vulnerabilities
USN-3815-1: gettext vulnerability

USN-3814-1: libmspack vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3814-1
November 12, 2018

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in libmspack.

Software Description:
- libmspack: library for Microsoft compression formats

Details:

It was discovered libmspack incorrectly handled certain malformed
CAB files.
A remote attacker could use this issue to cause libmspack to
crash, resulting
in a denial of service. (CVE-2018-18584, CVE-2018-18585)

Update instructions:

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

Ubuntu 18.10:
libmspack0 0.7-1ubuntu0.1

Ubuntu 18.04 LTS:
libmspack0 0.6-3ubuntu0.2

Ubuntu 16.04 LTS:
libmspack0 0.5-1ubuntu0.16.04.3

In general, a standard system update will make all the necessary
changes.

References:
https://usn.ubuntu.com/usn/usn-3814-1
CVE-2018-18584, CVE-2018-18585

Package Information:
https://launchpad.net/ubuntu/+source/libmspack/0.7-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libmspack/0.6-3ubuntu0.2
https://launchpad.net/ubuntu/+source/libmspack/0.5-1ubuntu0.16.04.3

USN-3815-1: gettext vulnerability

==========================================================================
Ubuntu Security Notice USN-3815-1
November 12, 2018

gettext vulnerability
==========================================================================

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

gettext could be made to execute arbitrary code if it received
a specially crafted message.

Software Description:
- gettext: GNU Internationalization utilities

Details:

It was discovered that gettext incorrectly handled certain messages.
An attacker could possibly use this issue to execute arbitrary code.

Update instructions:

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

Ubuntu 18.10:
  gettext 0.19.8.1-8ubuntu0.1

Ubuntu 18.04 LTS:
  gettext 0.19.8.1-6ubuntu0.1

Ubuntu 16.04 LTS:
  gettext 0.19.7-2ubuntu3.1

Ubuntu 14.04 LTS:
  gettext 0.18.3.1-1ubuntu3.1

In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3815-1
  CVE-2018-18751

Package Information:
  https://launchpad.net/ubuntu/+source/gettext/0.19.8.1-8ubuntu0.1
  https://launchpad.net/ubuntu/+source/gettext/0.19.8.1-6ubuntu0.1
  https://launchpad.net/ubuntu/+source/gettext/0.19.7-2ubuntu3.1
  https://launchpad.net/ubuntu/+source/gettext/0.18.3.1-1ubuntu3.1