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From Kaxil Naik <kaxiln...@apache.org>
Subject CVE-2021-35936: Apache Airflow: No Authentication on Logging Server
Date Fri, 13 Aug 2021 12:20:03 GMT
Description:

If remote logging is not used, the worker (in the case of CeleryExecutor) or the scheduler
(in the case of LocalExecutor) runs a Flask logging server and is listening on a specific
port and also binds on 0.0.0.0 by default.
This logging server had no authentication and allows reading log files of DAG jobs.

This issue affects Apache Airflow < 2.1.2.

Mitigation:

Use remote logging with GCS, S3, Elasticsearch etc. This is recommended for production environments.

And do not publicly expose any other ports apart from Webserver port, Flower port etc.

Credit:

Apache Airflow would like to thank Dolev Farhi for reporting this issue.


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