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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.014 (70.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
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)
References
- lists.apache.org/thread/od0k9zts1toc9h9snbqq4pjpyx28mv4m (vendor-advisory, Mailing List)
- www.openwall.com/lists/oss-security/2023/12/20/2 (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.