CVE-2021-26559: CWE-284 Improper Access Control on Configurations Endpoint for the Stable API
First published: Wed Feb 17 2021(Updated: )
Improper Access Control on Configurations Endpoint for the Stable API of Apache Airflow allows users with Viewer or User role to get Airflow Configurations including sensitive information even when `[webserver] expose_config` is set to `False` in `airflow.cfg`. This allowed a privilege escalation attack. This issue affects Apache Airflow 2.0.0.
Credit: security@apache.org security@apache.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apache Airflow | =2.0.0 | |
| pip/apache-airflow | =2.0.0 | 2.0.1rc1 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2021/02/17/1
- https://lists.apache.org/thread.html/r3b3787700279ec361308cbefb7c2cce2acb26891a12ce864e4a13c8d%40%3Cusers.airflow.apache.org%3E
- https://lists.apache.org/thread.html/rd142565996d7ee847b9c14b8a9921dcf80bc6bc160e3d9dca6dfc2f8@%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/rd142565996d7ee847b9c14b8a9921dcf80bc6bc160e3d9dca6dfc2f8%40%3Cannounce.apache.org%3E
- https://nvd.nist.gov/vuln/detail/CVE-2021-26559
- https://github.com/apache/airflow/blob/486b76438c0679682cf98cb88ed39c4b161cbcc8/CHANGELOG.txt
- https://github.com/apache/airflow/commit/3909232fafd09ac72b49010ecdfd6ea48f06d5cf
- https://github.com/apache/airflow/commit/5e35926c7eda0dfa11a9623e4bf5f60c2bd6b3f6
- https://github.com/advisories/GHSA-ffw3-6mp6-jmvj (Advisory)
- https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2021-2.yaml
Frequently Asked Questions
What is CVE-2021-26559?
CVE-2021-26559 is a vulnerability in Apache Airflow that allows users with Viewer or User role to access sensitive information.
What is the severity of CVE-2021-26559?
CVE-2021-26559 has a severity rating of medium (6.5).
How does CVE-2021-26559 affect Apache Airflow?
CVE-2021-26559 allows users with Viewer or User role to access sensitive information in Apache Airflow.
How can CVE-2021-26559 be fixed?
To fix CVE-2021-26559, update to Apache Airflow version 2.0.1.
What is CWE-269 and CWE-284?
CWE-269 refers to improper privilege management, while CWE-284 refers to improper access control.
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