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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.0331
                  USN-4261-1: WebKitGTK+ vulnerabilities
                              30 January 2020

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           WebKitGTK+
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Cross-site Scripting            -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-8846 CVE-2019-8844 CVE-2019-8835

Reference:         ESB-2020.0287
                   ESB-2019.4630

Original Bulletin: 
   https://usn.ubuntu.com/4261-1/

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USN-4261-1: WebKitGTK+ vulnerabilities
29 January 2020

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

  o Ubuntu 19.10
  o Ubuntu 18.04 LTS

Summary

Several security issues were fixed in WebKitGTK+.

Software Description

  o 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 19.10
    libjavascriptcoregtk-4.0-18 - 2.26.3-0ubuntu0.19.10.1
    libwebkit2gtk-4.0-37 - 2.26.3-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
    libjavascriptcoregtk-4.0-18 - 2.26.3-0ubuntu0.18.04.1
    libwebkit2gtk-4.0-37 - 2.26.3-0ubuntu0.18.04.1

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

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

  o CVE-2019-8835
  o CVE-2019-8844
  o CVE-2019-8846

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