British security researcher has figured out a way to manipulate legitimate features in Adobe PDF files to open back doors for computer attacks. David Kierznowski, a penetration testing expert specializing in Web application testing, has released proof-of-concept code and rigged PDF files to demonstrate how the Adobe Reader program could be used to launch attacks without any user action.

[NLN=Hacker Discovers Adobe PDF Back Doors]http://www.eweek.com/article2/0,1895,2016606,00.asp[/NLN]