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hn_throwaway_99 • today at 4:33 PM • 4 replies • view on HN

This is literally everything that's wrong with the modern tech industry in a nutshell:

> Danfoss told AFP in a statement that most of the affected equipment was "legacy" products which "no longer receive software or security updates".

They sell fricken refrigerators for God's sake. Maybe I can understand planned obsolescence for a cell phone, but a fridge? And especially to grocery stores that operate on razor thin margins to begin with, the idea that they'll just dump their old working refrigerators because the manufacturer refused security updates is a guaranteed recipe for stuff like this.


Replies

matthiasl • today at 5:55 PM

Danfoss are quoted as naming two systems, AK-SM800 and AK-SC355.

AK-SM800 looks like a current product. Danfoss have a PDF dated 2026.06 about it: https://assets.danfoss.com/documents/latest/590332/BC3376298.... This mentions "All new Electronics platform supporting new Operating System (based on Linux)", and specifically advises against connecting it to the internet.. Reading between the lines, especially section 10.5, it sounds like there was a major security revamp in 'release 4.0'. The article mentions "outdated firmware", so perhaps that refers to things before 4.0.

AK-SC355 looks like a product from 2010 (that's the date in the PDF metadata, plus the examples in the manual mention 2009). https://3.imimg.com/data3/ID/LC/MY-3170595/danfoss-system-ma...

I haven't worked with supermarket control systems, so I only know what I've read in the PDFs, but it looks like this is not about throwing out entire fridges to update the control system. If you have the newer AK-SM800, it looks like the suggested action is to update firmware and follow instructions about keeping it well away from internet access. If you have the older AK-SC355, then keeping it away from the internet is even more important. Or, update to AK-SC355.

_ache_ • today at 5:04 PM

It is a way to move the responsibility to the "users".

But the hack has already been disclosed and it's the responsability of the manufacturer to ensure that the fridge keep ever up to date or offline.

As with the USA Defense hack, it could have been prevented.

The hack: https://blog.claroty.com/team82/research/freeze-the-controll...

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zer00eyz • today at 4:38 PM

I have to question why this control system was even in place.

I could see remote monitoring (of temps) and logging on the system (cycle time etc) but does one really need to control the defrost cycle? It's probably just a web interface on a single controller that used to be accessed by HVAC techs only.

> > "legacy" products which "no longer receive software or security updates".

Because it's the EU I have to wonder if they will finally mandate that software go into escrow and be released if support stops.

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quickthrowman • today at 4:38 PM

Grocery stores do not use standalone refrigerators, I’m not sure why I have to keep repeating this fact when every single person has been in a grocery store and seen refrigerated cases that have a dozen or more doors.

They use cold cases and have rooftop or outdoor condensing units and evaporators inside of the cold cases/freezers/etc. There’s refrigerant piping running all over the place and there’s a bunch of sensors and relays that are automated to manage the refrigeration system.

My assumption is the Danfoss control system they’re using is EOL, it’s the grocer’s responsibility to upgrade their automation equipment if it’s unsupported.

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