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. Reference: http://activemq.apache.org/security-advisories.data/CVE-2020-13920-announcement.txt
This issue has been addressed in the following products: Red Hat Fuse 7.9 Via RHSA-2021:3140 https://access.redhat.com/errata/RHSA-2021:3140
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-13920
This issue has been addressed in the following products: Red Hat Integration Via RHSA-2021:3205 https://access.redhat.com/errata/RHSA-2021:3205
This issue has been addressed in the following products: Red Hat Integration Via RHSA-2021:3207 https://access.redhat.com/errata/RHSA-2021:3207