=========================================================================Ubuntu Security Notice USN-3079-1
September 14, 2016

webkit2gtk vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in WebKitGTK+.

Software Description:
- webkit2gtk: JavaScript engine library from WebKitGTK+ - GObject introspection

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 16.04 LTS:
  libjavascriptcoregtk-4.0-18     2.12.5-0ubuntu0.16.04.1
  libwebkit2gtk-4.0-37            2.12.5-0ubuntu0.16.04.1

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://ubuntu.com/security/notices/USN-3079-1
  CVE-2016-1854, CVE-2016-1856, CVE-2016-1857, CVE-2016-1858,
  CVE-2016-1859, CVE-2016-4583, CVE-2016-4585, CVE-2016-4586,
  CVE-2016-4588, CVE-2016-4589, CVE-2016-4590, CVE-2016-4591,
  CVE-2016-4622, CVE-2016-4623, CVE-2016-4624, CVE-2016-4651

Package Information:
  https://launchpad.net/ubuntu/+source/webkit2gtk/2.12.5-0ubuntu0.16.04.1