Lenovo Veriface III allows physically proximate attackers to login to a Windows account by presenting a "plain image" of the authorized user.
https://exchange.xforce.ibmcloud.com/vulnerabilities/48961
http://www.securityfocus.com/bid/32700
http://www.securityfocus.com/archive/1/498997
http://www.blackhat.com/html/bh-dc-09/bh-dc-09-archives.html#Nguyen