The following updates has been released for Ubuntu Linux:

USN-3889-1: WebKitGTK+ vulnerabilities
USN-3890-1: Django vulnerability

USN-3889-1: WebKitGTK+ vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3889-1
February 13, 2019

webkit2gtk vulnerabilities
==========================================================================

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in WebKitGTK+.

Software Description:
- webkit2gtk: Web content engine library for GTK+

Details:

A large number of security issues were discovered in the WebKitGTK+ Web
and JavaScript engines. If a user were tricked into viewing a malicious
website, a remote attacker could exploit a variety of issues related to web
browser security, including cross-site scripting attacks, denial of service
attacks, and arbitrary code execution.

Update instructions:

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

Ubuntu 18.10:
libjavascriptcoregtk-4.0-18 2.22.6-0ubuntu0.18.10.1
libwebkit2gtk-4.0-37 2.22.6-0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
libjavascriptcoregtk-4.0-18 2.22.6-0ubuntu0.18.04.1
libwebkit2gtk-4.0-37 2.22.6-0ubuntu0.18.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK+, such as Epiphany, to make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3889-1
CVE-2019-6212, CVE-2019-6215

Package Information:
https://launchpad.net/ubuntu/+source/webkit2gtk/2.22.6-0ubuntu0.18.10.1
https://launchpad.net/ubuntu/+source/webkit2gtk/2.22.6-0ubuntu0.18.04.1

USN-3890-1: Django vulnerability

==========================================================================
Ubuntu Security Notice USN-3890-1
February 13, 2019

python-django vulnerability
==========================================================================

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Django could be made to consume resources if it received specially crafted
network traffic.

Software Description:
- python-django: High-level Python web development framework

Details:

It was discovered that Django incorrectly handled formatting certain
numbers. A remote attacker could possibly use this issue to cause Django to
consume resources, leading to a denial of service.

Update instructions:

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

Ubuntu 18.10:
python-django 1:1.11.15-1ubuntu1.2
python3-django 1:1.11.15-1ubuntu1.2

Ubuntu 18.04 LTS:
python-django 1:1.11.11-1ubuntu1.3
python3-django 1:1.11.11-1ubuntu1.3

Ubuntu 16.04 LTS:
python-django 1.8.7-1ubuntu5.8
python3-django 1.8.7-1ubuntu5.8

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

References:
https://usn.ubuntu.com/usn/usn-3890-1
CVE-2019-6975

Package Information:
https://launchpad.net/ubuntu/+source/python-django/1:1.11.15-1ubuntu1.2
https://launchpad.net/ubuntu/+source/python-django/1:1.11.11-1ubuntu1.3
https://launchpad.net/ubuntu/+source/python-django/1.8.7-1ubuntu5.8