Use-after-free in Google Chrome - CVE-2021-21193

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Main Vulnerability Database Vulnerabilities #VU51436

Use-after-free in Google Chrome - CVE-2021-21193

Published: March 13, 2021 / Updated: March 15, 2021


Vulnerability identifier: #VU51436
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-2021-21193
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 within Blink component in Google Chrome. A remote attacker can create a specially crafted webpage, 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, this vulnerability is being actively exploited in the wild.


Affected software

Google Chrome
Microsoft Edge
Arch Linux
Gentoo Linux
Fedora
chromium (Debian package)
chromium

How to mitigate CVE-2021-21193

Install updates from vendor's website.

Google Chrome - update to 89.0.4389.90
chromium (Debian package) - update to 89.0.4389.114-1~deb10u1
Microsoft Edge - update to 89.0.774.54
chromium - addressed in versions 89.0.4389.90-3.el7, 89.0.4389.90-3.el8, 89.0.4389.90-3.fc32

External References

Related Security Bulletins