CVE-2021-21220 Google Chromium V8 Improper Input Validation

What is CVE-2021-21220?

CVE-2021-21220 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 26 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Insufficient validation of untrusted input in V8 in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Weakness: CWE-787

Which versions are affected by CVE-2021-21220?

It affects 2 products.

Products include Fedoraproject Fedora, Google Chrome.

How do I fix CVE-2021-21220?

Upgrade to a fixed version. US federal agencies must fix it by 17 Nov 2021.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-21220 being exploited?

Yes. Attackers have exploited CVE-2021-21220 in the wild since at least 3 Nov 2021.

Public exploit code: 1 Metasploit module and 4 proofs of concept on GitHub.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2024-WN69569, DEBIAN-CVE-2021-21220, GHSA-5cw9-vvr5-jcwf, UBUNTU-CVE-2021-21220.