iOS Vulnerability Allows Web-Based iPhone Jailbreak
A web-based method for jailbreaking an iPhone has been made public, highlighting a critical vulnerability in Appleās iOS. This vulnerability affects iOS versions 3.1.2 to 4.0.1, and all models of iPhone, iPod touch and iPad. Visiting a web site set up to perform this jailbreak operation will lead to the download of a PDF file, [...]
http://blog.intego.com/2010/08/04/ios-vulnerability-allows-web-based-iphone-jailbreak/