CVE-2023-37544

moderate-risk

Published 2023-12-20

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.

Do I need to act?

0.07% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (2)

Pulsar

Affected Vendors

Apache

References (4)

Mailing List http://www.openwall.com/lists/oss-security/2023/12/20/2

Mailing List https://lists.apache.org/thread/od0k9zts1toc9h9snbqq4pjpyx28mv4m

Mailing List http://www.openwall.com/lists/oss-security/2023/12/20/2

Mailing List https://lists.apache.org/thread/od0k9zts1toc9h9snbqq4pjpyx28mv4m

/ 100

moderate-risk

Severity 26/34 · High

Exploitability 0/34 · Minimal

Exposure 7/34 · Low