CVE-2024-29733: Apache Airflow FTP Provider: FTP_TLS instance with unverified SSL context

[Elad Kalif <eladkal () apache org>]

Severity: low

Affected versions:

- Apache Airflow FTP Provider before 3.7.0

Description:

Improper Certificate Validation vulnerability in Apache Airflow FTP Provider.

The FTP hook lacks complete certificate validation in FTP_TLS connections, which can potentially be leveraged. 
Implementing proper certificate validation by passing context=ssl.create_default_context() during FTP_TLS instantiation 
is used as mitigation to validate the certificates properly.

This issue affects Apache Airflow FTP Provider: before 3.7.0.

Users are recommended to upgrade to version 3.7.0, which fixes the issue.

Credit:

Eric Brown of Secure Sauce LLC (finder)

References:

https://github.com/apache/airflow/pull/38266
https://github.com/apache/airflow/blob/95e26118b828c364755f3a8c96870f3591b01c31/airflow/providers/ftp/hooks/ftp.py#L280
https://docs.python.org/3/library/ssl.html#best-defaults
https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2024-29733