Auth bypass in Apache Activemq
CVE-2020-13920
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.
Vulnerability class: Broken Authentication
EPSS: 0.046 (90.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Apache Activemq
- Oracle Communications_diameter_signaling_router
- Oracle Flexcube_private_banking — versions 12.0.0, 12.1.0
- Debian Debian_linux — versions 9.0
- N/a Apache Activemq — versions Apache ActiveMQ version prior to 5.15.12
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (Vendor Advisory)
- security@apache.org (mailing-list, Mailing List, Third Party Advisory)
- security@apache.org (Third Party Advisory)
- security@apache.org (mailing-list)
- security@apache.org (mailing-list)
- security@apache.org (mailing-list)
Frequently asked questions
- What is CVE-2020-13920?
- CVE-2020-13920 is a medium-severity vulnerability in Apache Activemq, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2020-09-10.
- How severe is CVE-2020-13920?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2020-13920 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.