# CVE-2024-23944: zookeeper: Information disclosure in persistent watchers handling in Apache ZooKeeper due to missing ACL check

CVE-2024-23944 is fixed in zookeeper on 1 platform, first by DEBIAN-CVE-2024-23944, released March 15, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-23944
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 15, 2024

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | zookeeper Debian 12.15 (bookworm) | 3.8.0-11+deb12u2 | [DEBIAN-CVE-2024-23944](https://patchblox.com/security/data/fix/linux/debian-cve-2024-23944.md) | Mar 15, 2024 |
| Linux | zookeeper Debian 13.5 (trixie) | 3.9.2-1 | [DEBIAN-CVE-2024-23944](https://patchblox.com/security/data/fix/linux/debian-cve-2024-23944.md) | Mar 15, 2024 |
| Linux | zookeeper Debian 14 | 3.9.2-1 | [DEBIAN-CVE-2024-23944](https://patchblox.com/security/data/fix/linux/debian-cve-2024-23944.md) | Mar 15, 2024 |

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