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Ubuntu Security Notice USN-4178-1
November 07, 2019

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

- Ubuntu 19.04
- 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 19.04:
  libjavascriptcoregtk-4.0-18     2.26.1-0ubuntu0.19.04.3
  libwebkit2gtk-4.0-37            2.26.1-0ubuntu0.19.04.3

Ubuntu 18.04 LTS:
  libjavascriptcoregtk-4.0-18     2.26.1-0ubuntu0.18.04.1
  libwebkit2gtk-4.0-37            2.26.1-0ubuntu0.18.04.1

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/4178-1
  CVE-2019-8625, CVE-2019-8720, CVE-2019-8769, CVE-2019-8771

Package Information:
  https://launchpad.net/ubuntu/+source/webkit2gtk/2.26.1-0ubuntu0.19.04.3
  https://launchpad.net/ubuntu/+source/webkit2gtk/2.26.1-0ubuntu0.18.04.1