Severity: low

Affected versions:

- Apache Airflow before 2.7.0

Description:

The session fixation vulnerability allowed the authenticated user to continue 
accessing Airflow webserver even after the password of the user has been reset 
by the admin - up until the expiry of the session of the user. Other than 
manually cleaning the session database (for database session backend), or 
changing the secure_key and restarting the webserver, there were no mechanisms 
to force-logout the user (and all other users with that).

With this fix implemented, when using the database session backend, the 
existing sessions of the user are invalidated when the password of the user is 
reset. When using the securecookie session backend, the sessions are NOT 
invalidated and still require changing the secure key and restarting the 
webserver (and logging out all other users), but the user resetting the 
password is informed about it with a flash message warning displayed in the UI. 
Documentation is also updated explaining this behaviour.

Users of Apache Airflow are advised to upgrade to version 2.7.0 or newer to 
mitigate the risk associated with this vulnerability.

Credit:

Yusuf AYDIN (@h1_yusuf) (finder)
L3yx of Syclover Security Team. (finder)

References:

https://github.com/apache/airflow/pull/33347
https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2023-40273

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