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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-29733
• apache/airflow#38266
• https://docs.python.org/3/library/ssl.html#best-defaults
• https://github.com/apache/airflow/blob/95e26118b828c364755f3a8c96870f3591b01c31/airflow/providers/ftp/hooks/ftp.py#L280
• https://lists.apache.org/thread/265t5zbmtjs6h9fkw52wtp03nsbplky2
• http://www.openwall.com/lists/oss-security/2024/04/19/3