Microsoft Service Bus 1.1 on Microsoft Windows Server 2008 R2 SP1 and Server 2012 Gold and R2 allows remote authenticated users to cause a denial of service (AMQP messaging outage) via crafted AMQP messages, aka "Service Bus Denial of Service Vulnerability."
https://support.microsoft.com/kb/2972621
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-042
http://www.securitytracker.com/id/1030538