Use-after-free in macOS - CVE-2021-30795

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Main Vulnerability Database Vulnerabilities #VU55218

Use-after-free in macOS - CVE-2021-30795

Published: July 22, 2021


Vulnerability identifier: #VU55218
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-2021-30795
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 HTML content in WebKit. A remote attacker can create a specially crafted website, trick the victim into visiting 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

macOS
Arch Linux
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 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
libjavascriptcoregtk-4_0-18
libjavascriptcoregtk-4_0-18-debuginfo
libwebkit2gtk3-lang
libwebkit2gtk-4_0-37
libwebkit2gtk-4_0-37-debuginfo
typelib-1_0-JavaScriptCore-4_0
webkit2gtk3-devel
typelib-1_0-WebKit2-4_0
typelib-1_0-WebKit2WebExtension-4_0
webkit2gtk-4_0-injected-bundles
webkit2gtk-4_0-injected-bundles-debuginfo
webkit2gtk3-debugsource
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
Apple Safari

How to mitigate CVE-2021-30795

Install updates from vendor's website.

macOS - update to 11.5 20G71
webkit2gtk (Debian package) - update to 2.32.3-1~deb10u1
watchOS - update to 7.6 18U63
tvOS - update to 14.7 18M60
Apple Safari - update to 14.1.2
iPadOS - addressed in versions 14.7 18G69, 14.7 18G70
Apple iOS - update to 14.7 18G69
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
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
webkit2gtk3 - addressed in versions 2.32.3-1.fc33, 2.32.3-1.fc34
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
libwebkit2gtk3-lang - 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
webkit2gtk3-devel - update to 2.32.3-3.77.3
typelib-1_0-WebKit2-4_0 - update to 2.32.3-3.77.3
typelib-1_0-WebKit2WebExtension-4_0 - update to 2.32.3-3.77.3
webkit2gtk-4_0-injected-bundles - update to 2.32.3-3.77.3
webkit2gtk-4_0-injected-bundles-debuginfo - update to 2.32.3-3.77.3
webkit2gtk3-debugsource - 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

External References

Related Security Bulletins