Actively exploited · Published Jan 8, 2021 · Assigned by Chrome

CVE-2020-16017

Critical 9.6 Exploited

In plain English

A critical-severity use-after-free in Chrome from Google. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 2.7% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.6Critical

Exploit odds (30 days)2.7%top 13.9% of all CVEs

Exploited in the wildYesCISA KEV since Nov 3, 2021

Attack toolingNoneno public tooling known

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by May 3, 2022.

Official description

Use after free in site isolation in Google Chrome prior to 86.0.4240.198 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	chromium	87.0.4280.88-0.1	DEBIAN-CVE-2020-16017
Debian:13	chromium	87.0.4280.88-0.1	DEBIAN-CVE-2020-16017
Debian:14	chromium	87.0.4280.88-0.1	DEBIAN-CVE-2020-16017
NuGet	cefsharp.common	86.0.241	GHSA-gvqv-779r-4jgp
NuGet	cefsharp.winforms	86.0.241	GHSA-gvqv-779r-4jgp
NuGet	cefsharp.wpf	86.0.241	GHSA-gvqv-779r-4jgp
NuGet	cefsharp.wpf.hwndhost	86.0.241	GHSA-gvqv-779r-4jgp

Affected products (as reported)

Vendor	Product	Versions
Google	Chrome	unspecified – before 86.0.4240.198

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

https://chromereleases.googleblog.com/2020/11/stable-channel-update-for-desktop_11.html x_refsource_MISC
https://crbug.com/1146709 x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-16017 government-resource