Hackers have forced the temperature of many French supermarket fridges up to 50C overnight, in an “unprecedented” cyber-attack affecting several hundred stores across the country, with fires and food losses reported.
The Paris prosecutor’s office said on Monday the large-scale attack was “affecting connected refrigerators in several major food retailers across France”. Reported damage included “food losses and fires”, it added.
The prime minister, Sébastien Lecornu, instructed France’s national cybersecurity agency ANSSI to investigate, a person in his office said.
France “was coordinating with its European counterparts, as other countries may also be affected”, while also investigating whether any other French firms were at risk, they said.
Well, the temperature control and the remote monitored variables probably aren’t air-gapped. So if you gain access to the remote monitoring, you’re already in the system, from where you can attack the rest of the system. Ofcourse you could design the system so that there’s no link between the monitored stuff and the rest, but then you’d need extra components so there’s a financial driver not to do this if you build this kind of equipment.
Edit: this is all assuming that the system isn’t by design remote controllable, and my guess would be that it probably is. It allows equipment builders/suppliers to help their customers with “remote troubleshooting”.
They should copy some ideas from the manufacturing industry. If you want to change settings, you need to be physically on site. If you just want to monitor the system, you need to use the company-provided laptop and a VPN.
The article said the defrost cycle was trigged which is what heated the fidges to 50C (I was a bit confused at first as to how they could make them heat up past room temp).
I can imagine use cases for remotely controlling the settings in all the fridges across your hundreds of stores, but I suspect there might be a bit more hesitancy to buy the remotely controlled fridges now.