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Secondhand item came with previous owner's files on the SD card, do I return the card or format it? (lemmy.dbzer0.com)

submitted 10 months ago* (last edited 10 months ago) by [email protected] to c/[email protected]

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I bought a 3d printer off Ebay which got delivered not too long ago, and it came with 2 sd cards - one with a build video and some demo print files, but worryingly another card that has all the previous owner's personal files on there.

Not sure whether to format it, or to contact the seller offering to send the card back (free of charge)... how would you prefer to be approached in a similar situation?

Edit: No gcode files are on the card, just 30gb of pictures, music and videos. Sent the seller a message offering to upload it to cloud or to send the card back

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[–] [email protected] 5 points 10 months ago (1 children)

We're talking about an sd card here. The absolute majority of these attacks only work with USB drives.

And the rest either don't make sense or make use of a 0day, which, as I've already said, is inconceivable

[–] [email protected] 2 points 10 months ago (2 children)

How do you read a SD card? I usually put it in my SD card reader which is USB.

[–] [email protected] 11 points 10 months ago

The SD card is still speaking SD protocol, the card reader bridges between USB and SD.

This only works with USB sticks because they're plugged on directly over USB and you don't know whether it'll present itself as a storage device or as a keyboard that immediately starts typing stuff and running a bunch of commands.

The risk is not the flash storage part, it's the USB interface.

[–] [email protected] 1 points 10 months ago

But I don't think OP is saying the package came with an sd card reader as well that they used