Vulnerable industrial controls directly connected to Internet
PLC manufacturers and the controls community in general is lagging behind technologically by twenty years. It is very frustrating for a security-minded, computer-literate controls engineer to work with decade old hardware and software.<p>In a company I worked at, there were PLCs controlling sensitive processes, including heaters for welding plastic, connected to the company network via Modbus-over-TCP. A visitor with a guest access, nmap and pymodbus could read AND SET temperatures of any of the devices. A black hat could easily have started fires or leaked acid in our production floor.