Date: Fri, 13 Aug 2021 12:20:03 +0000 From: Kaxil Naik <kaxilnaik@...che.org> To: oss-security@...ts.openwall.com Subject: CVE-2021-35936: Apache Airflow: No Authentication on Logging Server 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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