Is your iPhone next?

iPhone's first worm: half prank, half warning
Andy Greenberg, Forbes
Published: Tuesday, November 10, 2009 The iphone worm switched the user's operating system wallpaper to Astley's face, along with a message: "ikee is never gonna give you up." (Getty Images)

The first real-world iPhone cyber-attack has shown its face. And that face belongs to 1980s pop star Rick Astley.

Over the weekend, researchers at cybersecurity firms Sophos and F-Secure detected the world's first active iPhone worm, spreading among Apple smart phone users in Australia. Only users who have "jailbroken" their phones -- altered them to run applications not authorized by Apple -- are vulnerable, and among those, only those who failed to change their default password for a secure shell (SSH) application that allows file transfers between smart phones.