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CVE-2024-51504

Apache Zookeeper authentication bypass

9.1 CRITICALEPSS 0.92%
  1. Published7 Nov 2024

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

Apache Zookeeper≥ 3.9.0 < 3.9.3

Remediation

Fixed in
Apache Zookeeper≥ 3.9.3

References

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Frequently asked

Is CVE-2024-51504 being actively exploited?

CVE-2024-51504 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.92%.

How severe is CVE-2024-51504?

CVE-2024-51504 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.92% probability of exploitation.

Which products are affected by CVE-2024-51504?

Affected products include Apache Zookeeper.

How do I fix CVE-2024-51504?

Upgrade affected software to a fixed version, for example Apache Zookeeper 3.9.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-51504 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.