CVE-2021-37973: Google Chromium Portals Use-After-Free Vulnerability
CVE-2021-37973 · Severity: critical · CVSS 9.6 · Exploited in the wild · Published 2021-11-03
A use-after-free vulnerability exists in the Portals component of Google Chromium. A remote attacker who has already compromised the renderer process can exploit this flaw via a crafted HTML page to achieve a sandbox escape.
Yes. CVE-2021-37973 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-37973?
Critical severity, with a CVSS score of 9.6, published 3 November 2021.
Which products and versions are affected?
Google Chrome prior to 94.0.4606.61; Microsoft Edge; Google Chromium.
Is there a fix for CVE-2021-37973?
A patch was published on 2021-09-24: Stable channel update for desktop 94.0.4606.61 released. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-37973 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2021-37973?
Check whether you run Google Chromium Portals. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Google Chrome prior to 94.0.4606.61
Microsoft Edge
Google Chromium
Timeline
2021-09-24: patched: Stable channel update for desktop 94.0.4606.61 released.
2021-11-03: disclosed: Vulnerability published and added to CISA KEV catalog.
2021-11-03: kev added
2021-11-03: exploited: Reported as exploited in the wild.