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Insufficient Session Expiration Affecting kanboard package, versions *

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

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  • Snyk IDSNYK-DEBIAN12-KANBOARD-8537308
  • published20 Dec 2024
  • disclosed19 Dec 2024
Report a new vulnerability Found a mistake?

Introduced: 19 Dec 2024

NewCVE-2024-55603  (opens in a new tab)
CWE-613  (opens in a new tab)

How to fix?

There is no fixed version for Debian:12 kanboard.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kanboard package and not the kanboard package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

Kanboard is project management software that focuses on the Kanban methodology. In affected versions sessions are still usable even though their lifetime has exceeded. Kanboard implements a cutom session handler (app/Core/Session/SessionHandler.php), to store the session data in a database. Therefore, when a session_id is given, kanboard queries the data from the sessions sql table. At this point, it does not correctly verify, if a given session_id has already exceeded its lifetime (expires_at). Thus, a session which's lifetime is already > time(), is still queried from the database and hence a valid login. The implemented SessionHandlerInterface::gc function, that does remove invalid sessions, is called only with a certain probability (Cleans up expired sessions. Called by session_start(), based on session.gc_divisor, session.gc_probability and session.gc_maxlifetime settings) accordingly to the php documentation. In the official Kanboard docker image these values default to: session.gc_probability=1, session.gc_divisor=1000. Thus, an expired session is only terminated with probability 1/1000. This issue has been addressed in release 1.2.43 and all users are advised to upgrade. There are no known workarounds for this vulnerability.