The (1) proton.reactor.Connector, (2) proton.reactor.Container, and (3) proton.utils.BlockingConnection classes in Apache Qpid Proton before 0.12.1 improperly use an unencrypted connection for an amqps URI scheme when SSL support is unavailable, which might allow man-in-the-middle attackers to obtain sensitive information or modify data via unspecified vectors.
lists.fedoraproject.org/pipermail/package-announce/2016-April/182414.html
packetstormsecurity.com/files/136403/Apache-Qpid-Proton-0.12.0-SSL-Failure.html
qpid.apache.org/releases/qpid-proton-0.12.1/release-notes.html
www.securityfocus.com/archive/1/537864/100/0/threaded
git-wip-us.apache.org/repos/asf?p=qpid-proton.git;h=a058585
github.com/advisories/GHSA-f5cf-f7px-xpmh
issues.apache.org/jira/browse/PROTON-1157
lists.apache.org/thread.html/914424e4d798a340f523b6169aaf39b626971d9bb00fcdeb1d5d6c0d@%3Ccommits.qpid.apache.org%3E
nvd.nist.gov/vuln/detail/CVE-2016-2166