http://www.theregister.co.uk/2006/08...k_hack_attack/

Jesse D'Aguanno, director of security research at German firm Praetorian Global, gave a presentation on how to use the BlackBerry environment to circumvent perimeter defenses and directly attack hosts on a corporate intranet at last week's DefCon conference in Vegas. The demo included a live presentation. Next week D'Aguanno plans to release source code for BBProxy, the tool used to conduct the attack, which he describes as "Blackjacking".

BBProxy can be installed on a BlackBerry or sent in an email attachments to potential targets. The code can be hidden in something apparently innocuous such as a naughts and crosses game, D'Aguanno suggests. Once activated, BBProxy opens a covert channel between hackers and compromised hosts on improperly secured corporate networks. The communications channel between the BlackBerry server and handheld device is encrypted and cannot be properly inspected by typical security products.