Use-after-free in macOS - CVE-2021-1788

Vulnerability identifier: #VU50231

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-2021-1788

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in 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.

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

Install updates from vendor's website.

macOS - update to 11.2 20D64
WebKitGTK+ - update to 2.32.0
WPE WebKit - update to 2.32.0
Apple Safari - update to 14.0.3
iPadOS - update to 14.4 18D52
webkit2gtk (Debian package) - update to 2.32.1-1~deb10u1
webkit2gtk3 - addressed in versions 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
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
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
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
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
Apple iOS - update to 14.4 18D52
libwebkit2gtk-4.0-37 (Ubuntu package) - addressed in versions 2.32.0-0ubuntu0.18.04.1, 2.32.0-0ubuntu0.20.04.1, 2.32.0-0ubuntu0.20.10.1
libjavascriptcoregtk-4.0-18 (Ubuntu package) - addressed in versions 2.32.0-0ubuntu0.18.04.1, 2.32.0-0ubuntu0.20.04.1, 2.32.0-0ubuntu0.20.10.1

• https://support.apple.com/en-us/HT212147

• Multiple vulnerabilities in Apple macOS
• Multiple vulnerabilities in Apple Safari
• Multiple vulnerabilities in WebKitGTK and WPE WebKit
• Debian update for webkit2gtk
• Gentoo update for WebkitGTK+
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3
• Ubuntu update for webkit2gtk
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3
• Multiple vulnerabilities in Apple iOS and iPadOS
• SUSE update for webkit2gtk3
• SUSE update for webkit2gtk3
• Fedora 34 update for webkit2gtk3
• Fedora 33 update for webkit2gtk3
• Red Hat Enterprise Linux 7 Extended Lifecycle Support update for webkitgtk4