Integer signedness error in RNADiagnostics.dll in Rockwell Automation FactoryTalk Services Platform (FTSP) CPR9 CPR9-SR1 CPR9-SR2 CPR9-SR3 CPR9-SR4 CPR9-SR5 CPR9-SR5.1 and CPR9-SR6 allows remote attackers to cause a denial of service (service outage or RNADiagReceiver.exe daemon crash) via UDP data that specifies a negative integer value.