Anthony Rose, an electrical engineer, was able to hack 12 out of 16 Bluetooth Low Energy smart locks as part of his research into their vulnerabilities. He presented his findings at the DEF CON hacker conference in Las Vegas on Saturday.
Via Tom's Guide:
Four locks, for example, transmitted their user passwords in plaintext to smartphones, making it easy for anyone with a $100 Bluetooth sniffer to pluck the passwords out of thin air.
Two of those four models, the Quicklock Doorlock and Quicklock Padlock, sent the password twice, Rose said. He and Ramsey found that they could change the user password by returning the same command with the second iteration of the password changed to something else, freezing out the legitimate user.
"The user can't reset it without removing the battery, and he can't remove the battery without unlocking the lock," Rose said.
Other lock manufacturers said they encrypted the user password for Bluetooth transmissions, Rose said. Technically, they did. But with at least one, Rose discovered that he could simply grab the encrypted password out of the air, then send it back to the lock — and the lock would unlock without the password ever being decrypted.
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