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CVE-2023-37544

7.5 · HIGH

Improper Authentication vulnerability in Apache Pulsar WebSocket Proxy allows an attacker to connect to the /pingpong endpoint without authentication.

Published Dec 20, 2023CWE-287EPSS 1.35%

Overview

CVE-2023-37544 is a high-severity vulnerability. It was published on December 20, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Improper Authentication vulnerability in Apache Pulsar WebSocket Proxy allows an attacker to connect to the /pingpong endpoint without authentication.

This issue affects Apache Pulsar WebSocket Proxy: from 2.8.0 through 2.8.*, from 2.9.0 through 2.9.*, from 2.10.0 through 2.10.4, from 2.11.0 through 2.11.1, 3.0.0.

The known risks include a denial of service due to the WebSocket Proxy accepting any connections, and excessive data transfer due to misuse of the WebSocket ping/pong feature.

2.10 Pulsar WebSocket Proxy users should upgrade to at least 2.10.5.

2.11 Pulsar WebSocket Proxy users should upgrade to at least 2.11.2.

3.0 Pulsar WebSocket Proxy users should upgrade to at least 3.0.1.

3.1 Pulsar WebSocket Proxy users are unaffected.

Any users running the Pulsar WebSocket Proxy for 2.8, 2.9, and earlier should upgrade to one of the above patched versions.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2023/12/20/2Reflists.apache.org/thread/od0k9zts1toc9h9snbqq4pjpyx28mv4mRefwww.openwall.com/lists/oss-security/2023/12/20/2Reflists.apache.org/thread/od0k9zts1toc9h9snbqq4pjpyx28mv4m

How CyberStrike helps

Frequently asked questions

What is CVE-2023-37544?

CVE-2023-37544 is a high-severity vulnerability. It was published on December 20, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-37544?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-37544?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-37544?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-37544 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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