Apache CloudStack before 4.3.2 and 4.4.x before 4.4.2 allows remote attackers to obtain private keys via a listSslCerts API call.
https://issues.apache.org/jira/browse/CLOUDSTACK-7952
http://secunia.com/advisories/62216
http://docs.cloudstack.apache.org/projects/cloudstack-release-notes/en/4.3.2/about.html