Many users jailbreak their iPhone or iPod touch to get away from the restrictions placed by Apple on the device, however looks like there might be a slight problem.

A rogue worm has been released which affects iPhone and iPod Touch with Open SSH installed through Cydia. The worm only affects users who have not updated the default password for OpenSSH.

According to Mashable:

The worm’s behavior is somewhat amusing: it changes your background to a photo of Rick Astley, then looks for other phones on the network to infect. That said, the exploit could easily be used by hackers with malicious intent for more nefarious purposes.

If you have Open SSH installed on a jailbroken iPhone or iPod Touch, it is highly advisable to update the default password for OpenSSH.