Use-after-free in WebKitGTK+ and WPE WebKit - CVE-2020-27918

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Main Vulnerability Database Vulnerabilities #VU48190

Use-after-free in WebKitGTK+ and WPE WebKit - CVE-2020-27918

Published: November 6, 2020 / Updated: March 23, 2021


Vulnerability identifier: #VU48190
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-27918
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing web content within WebKit. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


Affected software

WebKitGTK+
WPE WebKit
Gentoo Linux
Arch Linux
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE CaaS Platform
SUSE Enterprise Storage
watchOS
SUSE OpenStack Cloud
SUSE OpenStack Cloud Crowbar
HPE Helion Openstack
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise Software Development Kit
tvOS
iPadOS
Apple iOS
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Realtime Extension
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Desktop Applications
Ubuntu
Fedora
webkit2gtk (Debian package)
libjavascriptcoregtk-4.0-18 (Ubuntu package)
libwebkit2gtk-4.0-37 (Ubuntu package)
webkit2gtk3
webkit2gtk-4_0-injected-bundles
libwebkit2gtk-4_0-37-debuginfo
libwebkit2gtk-4_0-37
libjavascriptcoregtk-4_0-18-debuginfo
libjavascriptcoregtk-4_0-18
webkit2gtk3-devel
webkit2gtk3-debugsource
typelib-1_0-WebKit2WebExtension-4_0
typelib-1_0-WebKit2-4_0
webkit2gtk-4_0-injected-bundles-debuginfo
libwebkit2gtk3-lang
typelib-1_0-JavaScriptCore-4_0
webkitgtk4 (Red Hat package)

How to mitigate CVE-2020-27918

Install updates from vendor's website.

WebKitGTK+ - update to 2.30.6
WPE WebKit - update to 2.30.6
webkit2gtk (Debian package) - update to 2.30.6-1~deb10u1
watchOS - update to 7.1 18R590
tvOS - update to 14.2 18K57
iPadOS - update to 14.2 18B92
Apple iOS - update to 14.2 18B92
libjavascriptcoregtk-4.0-18 (Ubuntu package) - addressed in versions 2.30.6-0ubuntu0.18.04.1, 2.30.6-0ubuntu0.20.04.1, 2.30.6-0ubuntu0.20.10.1
libwebkit2gtk-4.0-37 (Ubuntu package) - addressed in versions 2.30.6-0ubuntu0.18.04.1, 2.30.6-0ubuntu0.20.04.1, 2.30.6-0ubuntu0.20.10.1
webkit2gtk3 - addressed in versions 2.30.6-1.fc32, 2.32.0-1.fc33, 2.32.0-1.fc34
webkit2gtk-4_0-injected-bundles - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
libwebkit2gtk-4_0-37-debuginfo - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
libwebkit2gtk-4_0-37 - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
libjavascriptcoregtk-4_0-18-debuginfo - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
libjavascriptcoregtk-4_0-18 - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
webkit2gtk3-devel - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
webkit2gtk3-debugsource - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
typelib-1_0-WebKit2WebExtension-4_0 - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
typelib-1_0-WebKit2-4_0 - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
webkit2gtk-4_0-injected-bundles-debuginfo - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
libwebkit2gtk3-lang - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
typelib-1_0-JavaScriptCore-4_0 - addressed in versions 2.32.0-3.15.1, 2.32.0-3.74.1, 2.32.1-2.63.3, 2.34.3-2.82.1, 2.34.3-3.92.1, 2.34.3-23.3
webkitgtk4 (Red Hat package) - update to 2.48.3-2.el7_9

External References

Related Security Bulletins