Chromebook Bug Could Reveal Location History
A little-known behavior in Chrome OS could reveal a user’s movements through Wi-Fi logs. Leveraging Chrome OS’s Guest mode feature, the attack would require physical access to the device, but it can be executed without knowing the user’s password or having login access.
“We are looking into this issue,” said a Google spokesperson. “In the meantime, device owners can turn off guest mode and disable the creation of new users.”
The bug stems from the way Chromebooks treat their Wi-Fi logs, which show when and how a computer connects to the broader internet. The logs can be confusing for nontechnical users, but they can be deciphered to reveal which Wi-Fi networks were in range of the computer. Combined with other available data, that could reveal the owner’s movements over the period of time covered by the logs, potentially as long as seven days.
Because Chrome OS keeps those logs in unprotected memory, they can be accessed without a password. Simply opening a Chromebook in Guest mode and navigating to a standardized address will bring up the logs in local storage. That will show all logs for the computer, even ones generated outside of Guest mode.
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