The Cisco PIX/ASA Finesse Operation System 7.1 and 7.2 allows local users to gain privileges by entering characters at the enable prompt, erasing these characters via the Backspace key, and then holding down the Backspace key for one second after erasing the final character. NOTE: third parties, including one who works for the vendor, have been unable to reproduce the flaw unless the enable password is blank
hackathology.blogspot.com/2008/01/pixasa-finesse-71-72-privilege.html
www.gnucitizen.org/projects/router-hacking-challenge/
www.securityfocus.com/archive/1/486938
www.securityfocus.com/archive/1/486959
www.securityfocus.com/archive/1/487051
www.securityfocus.com/archive/1/487579
www.securityfocus.com/archive/1/489009/100/0/threaded
www.securityfocus.com/bid/27457
exchange.xforce.ibmcloud.com/vulnerabilities/41129