What’s Vulnerable › Vulnerabilities
CVE-2020-13920
- Severity: medium (CVSS 5.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 4.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-09-10 · updated 2026-06-17
- Weakness: CWE-306
Description
Apache ActiveMQ uses LocateRegistry.createRegistry() to create the JMX RMI registry and binds the server to the "jmxrmi" entry. It is possible to connect to the registry without authentication and call the rebind method to rebind jmxrmi to something else. If an attacker creates another server to proxy the original, and bound that, he effectively becomes a man in the middle and is able to intercept the credentials when an user connects. Upgrade to Apache ActiveMQ 5.15.12.
Affected products
- Apache ActiveMQ: before 5.15.12 — fixed in 5.15.12
- Debian Linux: 9.0
- Oracle Corporation Communications Diameter Signaling Router (DSR): from 8.0.0 through 8.2.2
- Oracle Corporation FLEXCUBE Private Banking: 12.0.0, 12.1.0
How to fix
Upgrade to a fixed version: Apache ActiveMQ 5.15.12. Check the vendor advisory for mitigations.
References
- http://activemq.apache.org/security-advisories.data/CVE-2020-13920-announcement.txt
- https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apache.org%3E
- https://lists.apache.org/thread.html/rb2fd3bf2dce042e0ab3f3c94c4767c96bb2e7e6737624d63162df36d%40%3Ccommits.activemq.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2020/10/msg00013.html
- https://lists.debian.org/debian-lts-announce/2023/11/msg00013.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- http://activemq.apache.org/security-advisories.data/CVE-2020-13920-announcement.txt
- https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apache.org%3E
- https://lists.apache.org/thread.html/rb2fd3bf2dce042e0ab3f3c94c4767c96bb2e7e6737624d63162df36d%40%3Ccommits.activemq.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2020/10/msg00013.html
- https://lists.debian.org/debian-lts-announce/2023/11/msg00013.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
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