CVE-2024-23944

Information disclosure in persistent watchers handling in Apache ZooKeeper
due to missing ACL check. It allows an attacker to monitor child znodes by
attaching a persistent watcher (addWatch command) to a parent which the
attacker has already access to. ZooKeeper server doesn’t do ACL check when
the persistent watcher is triggered and as a consequence, the full path of
znodes that a watch event gets triggered upon is exposed to the owner of
the watcher. It’s important to note that only the path is exposed by this
vulnerability, not the data of znode, but since znode path can contain
sensitive information like user name or login ID, this issue is potentially
critical. Users are recommended to upgrade to version 3.9.2, 3.8.4 which
fixes the issue.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1066947&gt;