A WebKitGTK security update has been released for Ubuntu Linux 22.04 LTS and 23.04.

[USN-6426-1] WebKitGTK vulnerabilities

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Ubuntu Security Notice USN-6426-1
October 10, 2023

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

- Ubuntu 23.04
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in WebKitGTK.

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

Details:

Several 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 23.04:
libjavascriptcoregtk-4.0-18 2.42.1-0ubuntu0.23.04.1
libjavascriptcoregtk-4.1-0 2.42.1-0ubuntu0.23.04.1
libjavascriptcoregtk-6.0-1 2.42.1-0ubuntu0.23.04.1
libwebkit2gtk-4.0-37 2.42.1-0ubuntu0.23.04.1
libwebkit2gtk-4.1-0 2.42.1-0ubuntu0.23.04.1
libwebkitgtk-6.0-4 2.42.1-0ubuntu0.23.04.1

Ubuntu 22.04 LTS:
libjavascriptcoregtk-4.0-18 2.42.1-0ubuntu0.22.04.1
libjavascriptcoregtk-4.1-0 2.42.1-0ubuntu0.22.04.1
libjavascriptcoregtk-6.0-1 2.42.1-0ubuntu0.22.04.1
libwebkit2gtk-4.0-37 2.42.1-0ubuntu0.22.04.1
libwebkit2gtk-4.1-0 2.42.1-0ubuntu0.22.04.1
libwebkitgtk-6.0-4 2.42.1-0ubuntu0.22.04.1

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-6426-1
CVE-2023-39928, CVE-2023-41074, CVE-2023-41993

Package Information:
https://launchpad.net/ubuntu/+source/webkit2gtk/2.42.1-0ubuntu0.23.04.1
https://launchpad.net/ubuntu/+source/webkit2gtk/2.42.1-0ubuntu0.22.04.1