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Exploited vulnerability · CISA KEV

Is CVE-2021-30633 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Google Chromium Indexed DB API · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-30633, Google Chromium Indexed DB API Use-After-Free Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 26 days after it was published. It affects Google Chromium Indexed DB API. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity9.6CVSS 3.1 · critical
US federal due17 Nov 2021BOD 22-01 deadline

What it is

Google Chromium Indexed DB API 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. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

VendorGoogle (77 exploited CVEs in KEV)
ProductChromium Indexed DB API
VulnerabilityGoogle Chromium Indexed DB API Use-After-Free Vulnerability
WeaknessCWE-416
Published8 Oct 2021
Added to KEV3 Nov 2021
Reported by (CNA)Chrome

What to do

  1. Check whether you run it. Look for Chromium Indexed DB API 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 Oct 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for Google.

References

Questions

Is CVE-2021-30633 being exploited?

Yes. CISA added CVE-2021-30633 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-30633 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-2021-30633?

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 Chromium Indexed DB API 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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