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.