Researchers competing for $15,000 awards were able to successfully attack Internet Explorer 8 on Windows 7, Safari on Mac OS X, the iPhone 4, and the BlackBerry Torch 9800 in an annual hacker contest at the CanSecWest security conference this week.

For a variety of reasons, no efforts were made to attack Chrome, Firefox, Android or Windows Phone 7, the organizer of the Pwn2Own contest told CNET today.

One team of experts that had an exploit prepared to try against Windows 7 had to withdraw because of travel issues, according to Aaron Portnoy, manager of security research for HP DV Labs and lead for the ZDI (Zero Day Initiative) program that sponsors Pwn2Own.

Windows 7 also was going to be a target for George Hotz, who goes by the hacker name "Geohot," but he withdrew to focus on his legal defense, Portnoy said. Hotz has been sued by Sony for allegedly violating copyright laws by distributing tools that jailbreak the PlayStation 3, which allows home brew and pirated applications to be played on the console.

More: http://news.cnet.com/8301-27080_3-20042279-245.html