CVE-2023-44981 – Apache ZooKeeper: Authorization bypass in SASL Quorum Peer Authentication

https://notcve.org/view.php?id=CVE-2023-44981

11 Oct 2023 — Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. If SASL Quorum Peer authentication is enabled in ZooKeeper (quorum.auth.enableSasl=true), the authorization is done by verifying that the instance part in SASL authentication ID is listed in zoo.cfg server list. The instance part in SASL auth ID is optional and if it's missing, like 'eve@EXAMPLE.COM', the authorization check will be skipped. As a result an arbitrary endpoint could join the cluster and begin propagating count... • http://www.openwall.com/lists/oss-security/2023/10/11/4 • CWE-639: Authorization Bypass Through User-Controlled Key •