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.

Withdrawn by the publisher.

Affected: Maven: org.apache.qpid:proton-j

## Withdrawn Advisory This advisory has been withdrawn because the vulnerability only affects the **Qpid Proton C library** and not `org.apache.qpid:proton-j`. This link has been maintained to preserve external references.

## Original Description

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.

libqpid-proton-core10-0.38.0-2.1 on GA media

bootstrap: XSS in the data-target attribute qpid-proton: TLS Man in the Middle Vulnerability

Security update for qpid-proton

Affected: Ubuntu:16.04:LTS: qpid-proton, Ubuntu:18.04:LTS: qpid-proton

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.