ESB-2021.1582 – [Ubuntu] WebKitGTK: Multiple vulnerabilities

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AUSCERT External Security Bulletin Redistribution

ESB-2021.1582
USN-4939-1: WebKitGTK vulnerabilities
11 May 2021

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AusCERT Security Bulletin Summary
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Product: WebKitGTK
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands — Remote/Unauthenticated
Denial of Service — Remote/Unauthenticated
Cross-site Scripting — Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1871 CVE-2021-1844 CVE-2021-1788

Reference: ESB-2021.1566
ESB-2021.1486
ESB-2021.1420
ESB-2021.0827

Original Bulletin:
https://ubuntu.com/security/notices/USN-4939-1

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USN-4939-1: WebKitGTK vulnerabilities
10 May 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 libwebkit2gtk-4.0-37 – 2.32.0-0ubuntu0.20.10.1
o libjavascriptcoregtk-4.0-18 – 2.32.0-0ubuntu0.20.10.1

Ubuntu 20.04

o libwebkit2gtk-4.0-37 – 2.32.0-0ubuntu0.20.04.1
o libjavascriptcoregtk-4.0-18 – 2.32.0-0ubuntu0.20.04.1

Ubuntu 18.04

o libwebkit2gtk-4.0-37 – 2.32.0-0ubuntu0.18.04.1
o libjavascriptcoregtk-4.0-18 – 2.32.0-0ubuntu0.18.04.1

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-2021-1871
o CVE-2021-1844
o CVE-2021-1788

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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT’s members. As
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NOTE: This is only the original release of the security bulletin. It may
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===========================================================================
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
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On call after hours for member emergencies only.
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