CVE-2021-26697: Apache Airflow: Lineage API endpoint for Experimental API missed authentication check
First published: Wed Feb 17 2021(Updated: )
The lineage endpoint of the deprecated Experimental API was not protected by authentication in Airflow 2.0.0. This allowed unauthenticated users to hit that endpoint. This is low-severity issue as the attacker needs to be aware of certain parameters to pass to that endpoint and even after can just get some metadata about a DAG and a Task. 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/2021/02/17/2
- https://lists.apache.org/thread.html/r36111262a59219a3e2704c71e97cf84937dae5ba7a1da99499e5d8f9@%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/re21fec81baea7a6d73b0b5d31efd07cc02c61f832e297f65bb19b519%40%3Cusers.airflow.apache.org%3E
- https://lists.apache.org/thread.html/re21fec81baea7a6d73b0b5d31efd07cc02c61f832e297f65bb19b519@%3Cdev.airflow.apache.org%3E
- https://lists.apache.org/thread.html/re21fec81baea7a6d73b0b5d31efd07cc02c61f832e297f65bb19b519@%3Cusers.airflow.apache.org%3E
- https://lists.apache.org/thread.html/r36111262a59219a3e2704c71e97cf84937dae5ba7a1da99499e5d8f9%40%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/re21fec81baea7a6d73b0b5d31efd07cc02c61f832e297f65bb19b519%40%3Cdev.airflow.apache.org%3E
- https://nvd.nist.gov/vuln/detail/CVE-2021-26697
- https://github.com/apache/airflow/commit/21cedff205e7d62675949fda2aa4616d77232b76
- https://github.com/apache/airflow/commit/24a54242d56058846c7978130b3f37ca045d5142
- https://github.com/apache/airflow/commit/93957e917ff4cfb0be11aef088bd9527cf728a04
- https://github.com/advisories/GHSA-fh37-cx83-q542 (Advisory)
- https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2021-3.yaml
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-26697.
What is the title of this vulnerability?
The title of this vulnerability is 'The lineage endpoint of the deprecated Experimental API was not protected by authentication in Airflow 2.0.0.'
What is the severity of CVE-2021-26697?
The severity of CVE-2021-26697 is medium with a CVSS score of 5.3.
What software is affected by CVE-2021-26697?
Apache Airflow version 2.0.0 is affected by CVE-2021-26697.
How can the vulnerability be fixed?
To fix the vulnerability, it is recommended to upgrade to a version of Apache Airflow that includes the necessary authentication protection for the lineage endpoint.
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