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Exploited vulnerability · CISA KEV

Is CVE-2021-39226 exploited? Yes: in CISA KEV since 25 Aug 2022

Gociux · Grafana Labs Grafana · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-39226, Grafana Authentication Bypass Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 25 Aug 2022, 324 days after it was published. It affects Grafana Labs Grafana. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 25 Aug 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due15 Sep 2022BOD 22-01 deadline

What it is

Grafana contains an authentication bypass vulnerability that allows authenticated and unauthenticated users to view and delete all snapshot data, potentially resulting in complete snapshot data loss.

VendorGrafana Labs (2 exploited CVEs in KEV)
ProductGrafana
VulnerabilityGrafana Authentication Bypass Vulnerability
WeaknessCWE-287
Published5 Oct 2021
Added to KEV25 Aug 2022
Reported by (CNA)GitHub_M

What to do

  1. Check whether you run it. Look for Grafana in your asset inventory, including appliances and cloud images. Stack check lists every exploited Grafana Labs 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 5 Oct 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for Grafana Labs.

Other exploited CVEs in Grafana

References

Questions

Is CVE-2021-39226 being exploited?

Yes. CISA added CVE-2021-39226 to the Known Exploited Vulnerabilities catalog on 25 Aug 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-39226 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-2021-39226?

Apply updates per vendor instructions. Check Grafana Labs's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Grafana 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 August 2022 · Grafana Labs scorecard · act-now radar.

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