Malformed Packet Causes PLC Crash

Event Year: 2002 Reliability: Likely But Unconfirmed
Country: United States
Industry Type: Unknown

There was some new security software that sent a malformed “ICMP redirect” packet to all the TCP/IP devices in the system. Older PLC-5E controllers have a firmware weakness that can make them fault if they receive this kind of packet from a misconfigured router or a security scanner.