{"id":"DEBIAN-CVE-2024-55603","details":"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 `\u003e 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workarounds for this vulnerability.","modified":"2026-05-07T20:01:32.064602Z","published":"2024-12-19T00:15:06.713Z","withdrawn":"2026-05-07T20:01:32.064602Z","upstream":["CVE-2024-55603"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-55603"}],"affected":[{"package":{"name":"kanboard","ecosystem":"Debian:14","purl":"pkg:deb/debian/kanboard?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.44+ds-1"}]}],"versions":["1.2.22+ds-1","1.2.23+ds-1","1.2.23+ds-1.1","1.2.25+ds-1","1.2.25+ds-2","1.2.25+ds-3","1.2.26+ds-1","1.2.26+ds-2","1.2.26+ds-3","1.2.26+ds-4","1.2.30+ds-1","1.2.31+ds-1","1.2.31+ds2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2024-55603.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"}]}