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Exploited vulnerability · CISA KEV

Is CVE-2020-16017 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Google Chrome · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-16017, Google Chrome Use-After-Free Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 299 days after it was published. It affects Google Chrome. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity9.6CVSS 3.1 · critical
US federal due3 May 2022BOD 22-01 deadline

What it is

Google Chrome contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page.

VendorGoogle (77 exploited CVEs in KEV)
ProductChrome
VulnerabilityGoogle Chrome Use-After-Free Vulnerability
WeaknessCWE-416
Published8 Jan 2021
Added to KEV3 Nov 2021
Reported by (CNA)Chrome

What to do

  1. Check whether you run it. Look for Chrome in your asset inventory, including appliances and cloud images. Stack check lists every exploited Google CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 8 Jan 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for Google.

References

Questions

Is CVE-2020-16017 being exploited?

Yes. CISA added CVE-2020-16017 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-16017 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2020-16017?

Apply updates per vendor instructions. Check Google's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Chrome and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · Google scorecard · act-now radar.

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