Fridge hack costing millions and sparking fires stemmed from poor security

Earlier this week, a mass hack of refrigeration systems at an estimated 700 supermarkets throughout France caused them to suddenly malfunction, causing spoilage of untold tons of perishables and, in some cases, fires. As is now the norm, basic cybersecurity would have prevented it.

French authorities say the systems, made up of entire fleets of refrigerators and freezers throughout a store, were hacked. More specifically, Internet-connected controllers that allow technicians to remotely administer the store-wide systems were compromised. The unknown attackers responsible then activated defrosters long enough for the fridges to reach temperatures as high as 50° Celsius (122° Fahrenheit). By the time the mass compromise was discovered, food was spoiled, and in some cases their electrical systems caught fire.

Multiple security advisories and public research reports show that all three of the controller models reportedly hacked in the incident—sold by Danfoss of Denmark and Dixell and its parent company Copeland in the US—contained critical vulnerabilities that allow attackers to …