USN-3640-1: WebKitGTK+ vulnerability

8 May 2018

webkit2gtk vulnerability

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

  • Ubuntu 18.04 LTS
  • Ubuntu 17.10
  • Ubuntu 16.04 LTS


A security issue was fixed in WebKitGTK+.

Software Description

  • webkit2gtk - Web content engine library for GTK+


Ivan Fratric discovered that WebKitGTK+ incorrectly handled certain web content. If a user were tricked into viewing a malicious website, a remote attacker could possibly exploit this to execute arbitrary code.

Update instructions

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

Ubuntu 18.04 LTS
libjavascriptcoregtk-4.0-18 - 2.20.2-0ubuntu0.18.04.1
libwebkit2gtk-4.0-37 - 2.20.2-0ubuntu0.18.04.1
Ubuntu 17.10
libjavascriptcoregtk-4.0-18 - 2.20.2-0ubuntu0.17.10.1
libwebkit2gtk-4.0-37 - 2.20.2-0ubuntu0.17.10.1
Ubuntu 16.04 LTS
libjavascriptcoregtk-4.0-18 - 2.20.2-0ubuntu0.16.04.1
libwebkit2gtk-4.0-37 - 2.20.2-0ubuntu0.16.04.1

To update your system, please follow these instructions:

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.