Type Confusion in macOS - CVE-2021-30758

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Main Vulnerability Database Vulnerabilities #VU55217

Type Confusion in macOS - CVE-2021-30758

Published: July 22, 2021


Vulnerability identifier: #VU55217
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-2021-30758
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a type confusion error in WebKit. A remote attacker can trick the victim to open a specially crafted website, trigger a type confusion error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

macOS
Gentoo Linux
SUSE CaaS Platform
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Enterprise Storage
watchOS
SUSE OpenStack Cloud
SUSE Linux Enterprise Server
tvOS
iPadOS
Apple iOS
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Desktop Applications
SUSE Linux Enterprise Module for Basesystem
Ubuntu
Fedora
Apple Safari
webkit2gtk (Debian package)
webkit2gtk3
libwebkit2gtk3-lang
webkit2gtk3-devel
webkit2gtk3-debugsource
libjavascriptcoregtk-4_0-18
libjavascriptcoregtk-4_0-18-debuginfo
webkit2gtk-4_0-injected-bundles-debuginfo
webkit2gtk-4_0-injected-bundles
typelib-1_0-WebKit2WebExtension-4_0
typelib-1_0-WebKit2-4_0
libwebkit2gtk-4_0-37
libwebkit2gtk-4_0-37-debuginfo
typelib-1_0-JavaScriptCore-4_0
webkitgtk4 (Red Hat package)
typelib-1_0-Soup-2_4
libsoup-lang
libsoup-devel
libsoup-debugsource
libsoup-2_4-1-debuginfo
libsoup-2_4-1
libwebkit2gtk-4.0-37 (Ubuntu package)
libjavascriptcoregtk-4.0-18 (Ubuntu package)

How to mitigate CVE-2021-30758

Install updates from vendor's website.

macOS - update to 11.5 20G71
watchOS - update to 7.6 18U63
tvOS - update to 14.7 18M60
iPadOS - addressed in versions 14.7 18G69, 14.7 18G70
Apple Safari - update to 14.1.2
Apple iOS - update to 14.7 18G69
webkit2gtk (Debian package) - update to 2.32.3-1~deb10u1
webkit2gtk3 - update to 2.32.3-1.fc33
libwebkit2gtk3-lang - update to 2.32.3-3.77.3
webkit2gtk3-devel - update to 2.32.3-3.77.3
webkit2gtk3-debugsource - update to 2.32.3-3.77.3
libjavascriptcoregtk-4_0-18 - update to 2.32.3-3.77.3
libjavascriptcoregtk-4_0-18-debuginfo - update to 2.32.3-3.77.3
webkit2gtk-4_0-injected-bundles-debuginfo - update to 2.32.3-3.77.3
webkit2gtk-4_0-injected-bundles - update to 2.32.3-3.77.3
typelib-1_0-WebKit2WebExtension-4_0 - update to 2.32.3-3.77.3
typelib-1_0-WebKit2-4_0 - update to 2.32.3-3.77.3
libwebkit2gtk-4_0-37 - update to 2.32.3-3.77.3
libwebkit2gtk-4_0-37-debuginfo - update to 2.32.3-3.77.3
typelib-1_0-JavaScriptCore-4_0 - update to 2.32.3-3.77.3
webkitgtk4 (Red Hat package) - update to 2.48.3-2.el7_9
typelib-1_0-Soup-2_4 - update to 2.62.2-17.8.1
libsoup-lang - update to 2.62.2-17.8.1
libsoup-devel - update to 2.62.2-17.8.1
libsoup-debugsource - update to 2.62.2-17.8.1
libsoup-2_4-1-debuginfo - update to 2.62.2-17.8.1
libsoup-2_4-1 - update to 2.62.2-17.8.1
libwebkit2gtk-4.0-37 (Ubuntu package) - addressed in versions 2.32.3-0ubuntu0.18.04.1, 2.32.3-0ubuntu0.20.04.1, 2.32.3-0ubuntu0.21.04.1
libjavascriptcoregtk-4.0-18 (Ubuntu package) - addressed in versions 2.32.3-0ubuntu0.18.04.1, 2.32.3-0ubuntu0.20.04.1, 2.32.3-0ubuntu0.21.04.1

External References

Related Security Bulletins