CVE-2024-23944: Apache ZooKeeper: Information disclosure in persistent watcher handling
Apache ZooKeeper could allow a remote authenticated attacker to obtain sensitive information, caused by a flaw in persistent watchers handling. By attaching a persistent watcher to a parent, an attacker could exploit this vulnerability to obtain information of the full path of znodes, and use this information to launch further attacks against the affected system.
Other sources
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.
— Red Hat
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2024-23944?
The severity of CVE-2024-23944 is classified as medium due to its potential impact on sensitive information disclosure.
How do I fix CVE-2024-23944?
To fix CVE-2024-23944, upgrade Apache ZooKeeper to version 3.7.3, 3.8.4 or 3.9.2 or later releases.
Which versions of Apache ZooKeeper are affected by CVE-2024-23944?
Versions 3.6.0 to 3.7.2 and 3.9.0 to 3.9.1 of Apache ZooKeeper are affected by CVE-2024-23944.
Can an unauthenticated attacker exploit CVE-2024-23944?
No, CVE-2024-23944 requires a remote authenticated attacker to exploit the vulnerability.
What potential information can be obtained through CVE-2024-23944?
An attacker exploiting CVE-2024-23944 can obtain the full path of znodes in the ZooKeeper data tree.