From Ars Technica:
Fingerprint-reading software preinstalled on laptops sold by Dell, Sony, and at least 14 other PC makers contains a serious weakness that makes it trivial for hackers with physical control of the machine to quickly recover account passwords, security researchers said.
The UPEK Protector Suite, which was acquired by Melbourne, Florida-based Authentec two years ago, is marketed as a secure means for logging into Windows computers using an owner’s unique fingerprint, rather than a user-memorized password. In reality, using the software makes users less secure than they otherwise would be. When activated, the software writes Windows account passwords to the registry and encrypts them with a key that is easy for hackers to retrieve. Once the key has been acquired, it takes seconds to decrypt the password.
The UPEK app ships—or used to ship—on laptops manufactured by 16 different companies. In addition to Dell and Acer, other PC makers include Amoi, Asus, Clevo, Compal, Dell, Gateway, IBM/Lenovo, Itronix, MPC, MSI, NEC, Sager, Samsung, Sony, and Toshiba.