What is CVE-2023-37544?

CVE-2023-37544 is a high-severity vulnerability in Apache Pulsar, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-12-20.

How severe is CVE-2023-37544?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Apache Pulsar

CVE-2023-37544

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.

Vulnerability class: Broken Authentication

EPSS: 0.014 (68.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Apache Pulsar — versions 3.0.0
Apache Software Foundation Pulsar Websocket Proxy — versions 2.8.0, 2.9.0, 2.10.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security@apache.org (vendor-advisory, Mailing List)
security@apache.org (Mailing List)

Frequently asked questions

What is CVE-2023-37544?: CVE-2023-37544 is a high-severity vulnerability in Apache Pulsar, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-12-20.
How severe is CVE-2023-37544?: High severity. CVSS v3 base score is 7.5 out of 10.