Hackers breached fridges at 700 French supermarkets with date-based password

Refrigeration controllers at more than 700 French supermarkets used a password that rotated to the current date, with the username admin. Attackers pushed temperatures as high as 50°C for roughly six hours at stores run by Intermarché, Netto, Carrefour, Monoprix and E.Leclerc, forcing food to be discarded.

• Danfoss and Copeland controllers rotated the password to the current date automatically
• Temperatures were pushed to 50°C for about six hours at Intermarché, Carrefour and others
• The internet-facing devices ran outdated firmware with default credentials
• French authorities told supermarkets to disconnect the controllers from the internet