CVE-2024-23944
Apache ZooKeeper: Information disclosure in persistent watcher handling
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
5.3
Apache ZooKeeper: Information disclosure in persistent watcher handling
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.
- Record
CVE-2024-23944- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-862
- Updated
- 2026-11-02
EUVDEUVD-2024-1001
5.3
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.
- Record
EUVD-2024-1001- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-r978-9m6m-6gm6
5.3
Apache ZooKeeper vulnerable to information disclosure in persistent watchers handling
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.
- Record
GHSA-r978-9m6m-6gm6- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-200, CWE-862
- Updated
- 2026-11-02
NVD
5.3
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.
- Record
CVE-2024-23944- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-862
- Updated
- 2026-11-02
OSV
5.3
Apache ZooKeeper: Information disclosure in persistent watcher handling
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.
- Record
CVE-2024-23944- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-862
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2024-23944
5.3
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.
- Record
DEBIAN-CVE-2024-23944- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
Show 4 moreShow less
OSVGHSA-r978-9m6m-6gm6
5.3
Apache ZooKeeper vulnerable to information disclosure in persistent watchers handling
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.
- Record
GHSA-r978-9m6m-6gm6- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-200, CWE-862
- Updated
- 2026-11-02
OSVROOT-APP-MAVEN-CVE-2024-23944
5.3
CVE-2024-23944 in io.root.org.apache.zookeeper:zookeeper - Patched by Root
Root has patched CVE-2024-23944 in the io.root.org.apache.zookeeper:zookeeper package for Root:Maven. Multiple fixed versions available.
- Record
ROOT-APP-MAVEN-CVE-2024-23944- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
OSVUBUNTU-CVE-2024-23944
5.3
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.
- Record
UBUNTU-CVE-2024-23944- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
OSVBIT-zookeeper-2024-23944 No score
Apache ZooKeeper: Information disclosure in persistent watcher handling
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.
- Record
BIT-zookeeper-2024-23944- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.zookeeper:zookeeperMaven |
3.8.0 to 3.8.3 | 3.8.4 |
org.apache.zookeeper:zookeeperMaven |
3.9.0 to 3.9.1 | 3.9.2 |
org.apache.zookeeper:zookeeperMaven |
3.6.0 to 3.7.2 | None known |
zookeeperBitnami |
3.6.0 up to 3.8.4, 3.9.0 up to 3.9.2 | 3.8.43.9.2 |
zookeeperDebian:12 |
before 3.8.0-11+deb12u2, plus listed versions 3.8.0-113.8.0-11+deb12u1 |
3.8.0-11+deb12u2 |
zookeeperDebian:13 |
before 3.9.2-1 | 3.9.2-1 |
zookeeperDebian:14 |
before 3.9.2-1 | 3.9.2-1 |
org.apache.zookeeper:zookeeperMaven |
3.8.0 up to 3.8.4, plus listed versions 3.8.13.8.23.8.3 |
3.8.4 |
org.apache.zookeeper:zookeeperMaven |
3.9.0 up to 3.9.2, plus listed versions 3.9.1 |
3.9.2 |
org.apache.zookeeper:zookeeperMaven |
3.6.0 to 3.7.2, plus listed versions 3.6.13.6.23.6.33.6.43.7.03.7.1 |
None known |
zookeeperUbuntu:24.04:LTS |
All versions, plus listed versions 3.8.0-113.9.1-13.9.1-1build13.9.1-1build2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-23944 is a medium vulnerability (CVSS 5.3) in Apache Zookeeper, published March 15, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. Fixed in org.apache.zookeeper:zookeeper 3.8.4.
References
lists.apache.org/thread/96s5nqssj03rznz9hv58txdb2k1lr79k
openwall.com/lists/oss-security/2024/03/14/2
nvd.nist.gov/vuln/detail/CVE-2024-23944
github.com/apache/zookeeper/commit/29c7b9462681f47c2ac12e609341cf9f52abac5c
github.com/apache/zookeeper/commit/65b91d2d9a56157285c2a86b106e67c26520b01d
github.com/apache/zookeeper/commit/daf7cfd04005cff1a4f7cab5ab13d41db88d0cd8