-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0621
                    USN-4739-1: WebKitGTK vulnerability
                             19 February 2021

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

        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-2020-13558  

Reference:         ESB-2021.0605

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4739-1

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-4739-1: WebKitGTK vulnerability
18 February 2021

Several security issues were fixed in WebKitGTK.
Releases

  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS

Packages

  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 20.10

  o libjavascriptcoregtk-4.0-18 - 2.30.5-0ubuntu0.20.10.1
  o libwebkit2gtk-4.0-37 - 2.30.5-0ubuntu0.20.10.1

Ubuntu 20.04

  o libjavascriptcoregtk-4.0-18 - 2.30.5-0ubuntu0.20.04.1
  o libwebkit2gtk-4.0-37 - 2.30.5-0ubuntu0.20.04.1

Ubuntu 18.04

  o libjavascriptcoregtk-4.0-18 - 2.30.5-0ubuntu0.18.04.1
  o libwebkit2gtk-4.0-37 - 2.30.5-0ubuntu0.18.04.1

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

  o CVE-2020-13558

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=RHnJ
-----END PGP SIGNATURE-----