CVE-2024-51504: Apache ZooKeeper Authentication Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-g93m-8x6h-g5gv
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CWE-290
Published
Advisory Summary

CVE-2024-51504 is a HIGH authentication bypass vulnerability (CWE-290: Authentication Bypass by Spoofing) affecting Apache ZooKeeper libraries in the Maven ecosystem. The issue involves authentication bypass with ip-based authentication in admin server. Remediation is available by upgrading affected packages to version 3.9.3.

CVE-2024-51504 at a Glance

CVE Identifier CVE-2024-51504
GHSA Identifier GHSA-g93m-8x6h-g5gv
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-290: Authentication Bypass by Spoofing
Affected Product Apache ZooKeeper
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2024-51504

To remediate this vulnerability, upgrade all affected Apache ZooKeeper dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.zookeeper:zookeeper fixed: 3.9.3 
<dependency>
    <groupId>org.apache.zookeeper</groupId>
    <artifactId>zookeeper</artifactId>
    <version>3.9.3</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.apache.zookeeper

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2024-51504, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.zookeeper

Analyze the terminal output to locate any version of Apache ZooKeeper in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.9.3), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.zookeeper command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-290: Authentication Bypass by Spoofing, where this attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. In Apache ZooKeeper, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

When using IPAuthenticationProvider in ZooKeeper Admin Server there is a possibility of Authentication Bypass by Spoofing -- this only impacts IP based authentication implemented in ZooKeeper Admin Server. Default configuration of client's IP address detection in IPAuthenticationProvider, which uses HTTP request headers, is weak and allows an attacker to bypass authentication via spoofing client's IP address in request headers. Default configuration honors X-Forwarded-For HTTP header to read client's IP address. X-Forwarded-For request header is mainly used by proxy servers to identify the client and can be easily spoofed by an attacker pretending that the request comes from a different IP address. Admin Server commands, such as snapshot and restore arbitrarily can be executed on successful exploitation which could potentially lead to information leakage or service availability issues. Users are recommended to upgrade to version 3.9.3, which fixes this issue.

CVE-2024-51504 Affected Apache ZooKeeper Versions

1 component(s)
Fixed Versions:
3.9.3
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.zookeeper:zookeeper
maven/org.apache.zookeeper/zookeeper
Maven
≥ 3.9.0
< 3.9.3
3.9.3

References

NVD — CVE-2024-51504 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-51504
Security Fix Commit FIX COMMIT
https://github.com/apache/zookeeper/commit/2c2b74c1c11b6531aabb1bf06782e859048d5983
Apache ZooKeeper Source Repository REPOSITORY
https://github.com/apache/zookeeper
lists.apache.org/thread/b3qrmpkto5r6... WEB
https://lists.apache.org/thread/b3qrmpkto5r6989qr61fw9y2x646kqlh
Apache ZooKeeper Security Information SECURITY
http://www.openwall.com/lists/oss-security/2024/11/06/5

Frequently Asked Questions

What is CVE-2024-51504?
CVE-2024-51504 is a security vulnerability in Apache ZooKeeper involving Authentication bypass with IP-based authentication in Admin Server under CWE-290: Authentication Bypass by Spoofing.
Which Apache ZooKeeper versions are affected?
Affected versions include releases prior to 3.9.3 across affected packages: org.apache.zookeeper:zookeeper.
What version fixes CVE-2024-51504?
Upgrading to 3.9.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is zookeeper affected?
Yes, org.apache.zookeeper:zookeeper is affected in releases prior to 3.9.3. Upgrade your dependency to 3.9.3 or later.
What CWE is associated with CVE-2024-51504?
CVE-2024-51504 is classified under CWE-290: Authentication Bypass by Spoofing (This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.).
How can I check Maven dependencies for CVE-2024-51504?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.zookeeper'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g93m-8x6h-g5gv",
  "modified" : "2025-06-30T18:49:25Z",
  "published" : "2024-11-07T12:30:35Z",
  "aliases" : [ "CVE-2024-51504" ],
  "summary" : "Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server",
  "details" : "When using IPAuthenticationProvider in ZooKeeper Admin Server there is a possibility of Authentication Bypass by Spoofing -- this only impacts IP based authentication implemented in ZooKeeper Admin Server. Default configuration of client's IP address detection in IPAuthenticationProvider, which uses HTTP request headers, is weak and allows an attacker to bypass authentication via spoofing client's IP address in request headers. Default configuration honors X-Forwarded-For HTTP header to read client's IP address. X-Forwarded-For request header is mainly used by proxy servers to identify the client and can be easily spoofed by an attacker pretending that the request comes from a different IP address. Admin Server commands, such as snapshot and restore arbitrarily can be executed on successful exploitation which could potentially lead to information leakage or service availability issues. Users are recommended to upgrade to version 3.9.3, which fixes this issue.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.zookeeper:zookeeper"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.9.0"
      }, {
        "fixed" : "3.9.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-51504"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/zookeeper/commit/2c2b74c1c11b6531aabb1bf06782e859048d5983"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/zookeeper"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/b3qrmpkto5r6989qr61fw9y2x646kqlh"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2024/11/06/5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-290" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-30T18:49:25Z",
    "nvd_published_at" : "2024-11-07T10:15:08Z"
  }
}