CVE-2024-55603
There are no known workarounds for this vulnerability.
Does this matter?
Lower severity and a low EPSS score (0.50%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- EPSS
- 0.50% probability · 41th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-613
- Affected
- kanboard/kanboard
- Source
- security-advisories@github.com
References
- https://github.com/kanboard/kanboard/blob/main/app/Core/Session/SessionHandler.php#L40Product
- https://github.com/kanboard/kanboard/commit/7ce61c34d962ca8b5dce776289ddf4b207be6e78Patch
- https://github.com/kanboard/kanboard/security/advisories/GHSA-gv5c-8pxr-p484Exploit, Vendor Advisory
- https://www.php.net/manual/en/function.session-start.phpProduct
- https://www.php.net/manual/en/session.configuration.php#ini.session.gc-divisorProduct
- https://www.php.net/manual/en/session.configuration.php#ini.session.gc-maxlifetimeProduct
- https://www.php.net/manual/en/session.configuration.php#ini.session.gc-probabilityProduct
- https://www.php.net/manual/en/sessionhandlerinterface.gc.phpProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.