A couple of weeks ago, I was sat on the sofa when the ceiling lights came on.
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A couple of weeks ago, I was sat on the sofa when the ceiling lights came on. I don't use these lights very often. Having come on, they then cycled through all the colours. This is alarming. The lights are IKEA Tradfri bulbs, and I have a Tradfri gateway so I can control the lights via the app. My immediate concern was maybe someone had compromised my network and was experimenting with the API the gateway exposes. I started to do some debugging and network analysis.
Today I discovered...
1/n -
A couple of weeks ago, I was sat on the sofa when the ceiling lights came on. I don't use these lights very often. Having come on, they then cycled through all the colours. This is alarming. The lights are IKEA Tradfri bulbs, and I have a Tradfri gateway so I can control the lights via the app. My immediate concern was maybe someone had compromised my network and was experimenting with the API the gateway exposes. I started to do some debugging and network analysis.
Today I discovered...
1/n... The cause.
The last 5 years I've worked for a security company. I'm known for being paranoid about network security. Having my home network compromised like this would be bad. What else would they have access to ?
Turns out, this was not a security compromise. This was a poor interaction between old technology, and new.
The old technology? An IBM Personal Computer AT built sometime between 1984 and 1989, and the IKEA Tradfri control box.
What is this poor interaction?
2/n
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... The cause.
The last 5 years I've worked for a security company. I'm known for being paranoid about network security. Having my home network compromised like this would be bad. What else would they have access to ?
Turns out, this was not a security compromise. This was a poor interaction between old technology, and new.
The old technology? An IBM Personal Computer AT built sometime between 1984 and 1989, and the IKEA Tradfri control box.
What is this poor interaction?
2/n
Turns out the size of the IKEA Tradfri control unit is just slightly higher than the gap under the front of an IBM AT. If you push the front of the Tradfri unit, say, cos you lean against it without realising it. Then the Tradfri box slides under the AT, which presses the button on the face of the Tradfri, which turns the lights on, and starts cycling through the colours.
It wasn't some malicious hacker playing with my lights. It was just the Tradfri box being squeezed under a 30 yr old PC.
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