Buffer overflow in LogReceiver.exe in Rockwell Automation RSLinx Enterprise 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 (daemon crash) or possibly execute arbitrary code via a UDP packet with a certain integer length value that is (1) too large or (2) too small leading to improper handling by Logger.dll.