Heap-based buffer overflow in Google Chrome - CVE-2021-21148

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Main Vulnerability Database Vulnerabilities #VU50372

Heap-based buffer overflow in Google Chrome - CVE-2021-21148

Published: February 4, 2021


Vulnerability identifier: #VU50372
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-2021-21148
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

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

The vulnerability exists due to a boundary error within the V8 engine in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger heap-based buffer overflow and execute arbitrary code on the target system.

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

Note, the 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-2021-21148

Install updates from vendor's website.

Google Chrome - update to 88.0.4324.150
Microsoft Edge - update to 88.0.705.62
chromium (Debian package) - update to 88.0.4324.182-1~deb10u1
chromium - addressed in versions 88.0.4324.150-1.el7, 88.0.4324.150-1.el8, 88.0.4324.150-1.fc32, 88.0.4324.150-1.fc33

External References

Related Security Bulletins