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Fencer Vulns
medium 5.3

CVE-2024-23944 json

Apache ZooKeeper: Information disclosure in persistent watcher handling

published 2024-03-15 2 y ago modified 2026-09-10 1 mo ago also BIT-zookeeper-2024-23944 , EUVD-2024-1001 , GHSA-r978-9m6m-6gm6

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.apache.zookeeper:zookeeper 3.8.4, 3.9.2
  • bitnami zookeeper 3.8.4, 3.9.2
  • apache zookeeper 3.8.4, 3.9.2
  • org.apache.zookeeper zookeeper 3.8.4, 3.9.2
  • zookeeper Debian 12 3.8.0-11+deb12u2
  • zookeeper Debian 14, Debian 13 3.9.2-1

debian advisories DEBIAN-CVE-2024-23944

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-23944 updated cvss 6.6

Apache-ZooKeeper: Apache ZooKeeper: Information disclosure in persistent watcher handling

  • Red Hat Fuse 7 org.apache.zookeeper-parent org.apache.zookeeper-parent
    affected: no fix planned “Out of support scope”
  • Red Hat streams for Apache Kafka org.apache.zookeeper-zookeeper org.apache.zookeeper-zookeeper
    affected: no fix available
  • Red Hat AMQ Streams 2.5.2
    fixed: vendor fix RHSA-2024:6536
  • Red Hat JBoss Enterprise Application Platform 8 org.apache.zookeeper-parent org.apache.zookeeper-parent Red Hat JBoss Enterprise Application Platform Expansion Pack org.apache.zookeeper-parent org.apache.zookeeper-parent
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
GitHub 3.1 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CNA 3.1 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
OSV 3.1 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
maven org.apache.zookeeper:zookeeper
>=3.8.0, <3.8.4
>=3.9.0, <3.9.2
>=3.6.0, <=3.7.2
3.8.4
3.9.2
bitnami zookeeper
>=3.6.0, <3.8.4
>=3.9.0, <3.9.2
3.8.4
3.9.2

Affected products

  • Apache Software Foundation Apache ZooKeeper

Classification

Weakness
  • CWE-862 Missing Authorization
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.