We knew a few dangers from USB but , this one is more scary.
(From the article)
Nohl said his firm has performed attacks by writing malicious code onto USB control chips used in thumb drives and smartphones. Once the USB device is attached to a computer, the malicious software can log keystrokes, spy on communications and destroy data, he said.
Computers do not detect the infections when tainted devices are inserted because anti-virus programs are only designed to scan for software written onto memory and do not scan the "firmware" that controls the functioning of those devices, he said.
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