CVE-2019-0223: Apache Qpid

High severity, CVSS 7.4. EPSS: 6.2% chance of exploitation in the next 30 days.

While investigating bug PROTON-2014, we discovered that under some circumstances Apache Qpid Proton versions 0.9 to 0.27.0 (C library and its language bindings) can connect to a peer anonymously using TLS *even when configured to verify the peer certificate* while used with OpenSSL versions before 1.1.0. This means that an undetected man in the middle attack could be constructed if an attacker can arrange to intercept TLS traffic.

Affected products

• Apache Qpid: from 0.9, up to and including 0.27.0
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Eus: version 6.7 only; version 7.2 only; version 7.3 only; version 7.4 only; version 7.5 only; version 7.6 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 5.9 only; version 6.4 only; version 6.5 only; version 6.6 only; version 7.2 only; version 7.3 only; …
• Red Hat Enterprise Linux Server Tus: version 7.2 only; version 7.3 only; version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only
• Red Hat JBoss Amq Clients 2: affected versions not specified
• Red Hat Openstack: version 13 only; version 14 only
• Red Hat Satellite: version 6.3 only; version 6.4 only; version 6.5 only

Published 2019-04-23. Last modified 2026-06-17.