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  5. CVE-2021-38540

CVE-2021-38540: Missing Authentication for Critical Function in Apache Airflow

May 24, 2022 (updated September 11, 2024)

The variable import endpoint was not protected by authentication in Airflow >=2.0.0, <2.1.3. This allowed unauthenticated users to hit that endpoint to add/modify Airflow variables used in DAGs, potentially resulting in a denial of service, information disclosure or remote code execution. This issue affects Apache Airflow >=2.0.0, <2.1.3.

References

  • github.com/advisories/GHSA-h88f-r7cw-8fv3
  • github.com/apache/airflow
  • github.com/apache/airflow/commit/bcec1df703cd4a01520a90c3f801cca6f97d9bfd
  • github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2021-326.yaml
  • lists.apache.org/thread.html/rac2ed9118f64733e47b4f1e82ddc8c8020774698f13328ca742b03a2@%3Cannounce.apache.org%3E
  • lists.apache.org/thread.html/rb34c3dd1a815456355217eef34060789f771b6f77c3a3dec77de2064%40%3Cusers.airflow.apache.org%3E
  • nvd.nist.gov/vuln/detail/CVE-2021-38540

Code Behaviors & Features

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Affected versions

All versions starting from 2.0.0 before 2.1.3

Fixed versions

  • 2.1.3

Solution

Upgrade to version 2.1.3 or above.

Impact 9.8 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-306: Missing Authentication for Critical Function

Source file

pypi/apache-airflow/CVE-2021-38540.yml

Spotted a mistake? Edit the file on GitLab.

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