Use-after-free in Google Chrome - CVE-2021-37973

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Main Vulnerability Database Vulnerabilities #VU56876

Use-after-free in Google Chrome - CVE-2021-37973

Published: September 24, 2021 / Updated: September 25, 2021


Vulnerability identifier: #VU56876
CSH Severity: Critical
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-2021-37973
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: The vulnerability is being exploited in the wild

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 within the Portals component in Google Chrome. 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.

Note, the vulnerability is being actively exploited in the wild.


Affected software

Google Chrome
Microsoft Edge
Gentoo Linux
Fedora
qt5-qtwebengine
chromium
chromium (Debian package)

How to mitigate CVE-2021-37973

Install updates from vendor's website.

Google Chrome - update to 94.0.4606.61
Microsoft Edge - update to 94.0.992.31
qt5-qtwebengine - addressed in versions 5.15.8-2.fc34, 5.15.8-2.fc35
chromium - addressed in versions 94.0.4606.61-1.el8, 94.0.4606.61-1.fc33, 94.0.4606.61-1.fc34, 94.0.4606.61-1.fc35
chromium (Debian package) - update to 97.0.4692.71-0.1~deb11u1

External References

Related Security Bulletins