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AUSCERT External Security Bulletin Redistribution
ESB-2021.3198
USN-5087-1: WebKitGTK vulnerabilities
23 September 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: WebKitGTK
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-30858
Reference: ESB-2021.3161
ESB-2021.3103
ESB-2021.3101.2
Original Bulletin:
https://ubuntu.com/security/notices/USN-5087-1
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USN-5087-1: WebKitGTK vulnerabilities
22 September 2021
Several security issues were fixed in WebKitGTK.
Releases
o Ubuntu 21.04
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 21.04
o libwebkit2gtk-4.0-37 - 2.32.4-0ubuntu0.21.04.1
o libjavascriptcoregtk-4.0-18 - 2.32.4-0ubuntu0.21.04.1
Ubuntu 20.04
o libwebkit2gtk-4.0-37 - 2.32.4-0ubuntu0.20.04.1
o libjavascriptcoregtk-4.0-18 - 2.32.4-0ubuntu0.20.04.1
Ubuntu 18.04
o libwebkit2gtk-4.0-37 - 2.32.4-0ubuntu0.18.04.1
o libjavascriptcoregtk-4.0-18 - 2.32.4-0ubuntu0.18.04.1
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-2021-30858
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