If you ever have the desire to plug in a USB something-or-other to your computer, and you don't fully trust where it came from, stop right there. USB Mass Storage is one of about 20 USB base classes, each of which may be further divided into subclasses, and then into protocols.
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Do you trust your OS do do the right thing in each case? And is the "right thing" something that you'd personally consider to be "safe"? When you find a thing that looks like a thumb drive, or a lava lamp, or just a USB cable, how do you know what it actually does?
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Let's add ChromeOS to the list. And in this case, the technique was found via reading a man page. Yes, this is a known, documented behavior!pic.twitter.com/flYKRJuufS
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Since this is public documented behavior, I see no reason to embargo this. I present for you a story in two parts. That's right, the untrusted filesystem itself gets to decide the kernel-level behavior "if" the filesystem contains an error. You will now panic because I said so.pic.twitter.com/7uA1gnnwfx
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Ok, since abandoning VirtualBox (yikes, what a disaster that is, at least for virtualizing a Mac!), I was able to test the USB drive of death on a fully-patched macOS Mojave system. It is indeed a sad Mac.pic.twitter.com/xswvpCuW2T
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And even operating systems like OpenBSD are not immune to filesystem-corruption-induced panics. I have to wonder, however, how many people would set up an OpenBSD system to do automount? https://undeadly.org/cgi?action=article;sid=20131113030229 …pic.twitter.com/iJojqSNZmF
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My copy of this stopped working on Windows 10. Maybe they fixed the bug?
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Could be. They said they were going to fix some of the crashes, as a non-security update. So perhaps that time has arrived. I'm not at a computer at the moment, so I can't test right now.
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What sort of filesystem corruption?
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Just something unexpected. Malformed in some way.
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