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Exploited vulnerability · CISA KEV

Is CVE-2020-13927 exploited? Yes: in CISA KEV since 18 Jan 2022

Gociux · Apache Airflow's Experimental API · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-13927, Apache Airflow's Experimental API Authentication Bypass, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 18 Jan 2022, 434 days after it was published. It affects Apache Airflow's Experimental API. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 18 Jan 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due18 Jul 2022BOD 22-01 deadline

What it is

The previous default setting for Airflow's Experimental API was to allow all API requests without authentication.

VendorApache (41 exploited CVEs in KEV)
ProductAirflow's Experimental API
VulnerabilityApache Airflow's Experimental API Authentication Bypass
WeaknessCWE-1188, CWE-306
Published10 Nov 2020
Added to KEV18 Jan 2022
Reported by (CNA)apache

What to do

  1. Check whether you run it. Look for Airflow's Experimental API in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apache 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 10 Nov 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for Apache.

References

Questions

Is CVE-2020-13927 being exploited?

Yes. CISA added CVE-2020-13927 to the Known Exploited Vulnerabilities catalog on 18 Jan 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-13927 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-2020-13927?

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

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