Apple Security Breach Gives Complete Access to Your iPhone

[Osiris]

Apple Security Breach Gives Complete Access to Your iPhone

If you are an iPhone owner, you'll probably want to read this. Handy info to have…on many levels.

It just requires the user to visit a web address using Safari. The web site can automatically load a simple PDF document, which contains a font that hides a special program. When your iOS device tries to display the PDF file, that font causes something called stack overflow, a technical condition that allows the secret ninja code inside the font to gain complete control of your device.
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[hikaricloud]

Firstly, it would be good to mention that this is only an issue you can fix after jailbreaking, so people that have vanilla iPhones should just wait for the 4.1 public release.

Also, there is an easier solution for people who have jailbroken:

To install this fix, simply search for “PDF Loading Warner” in Cydia and install this app. You will now get warnings if or whenever any site tries to make use of this exploit by injecting malicious code in your iOS device.

Source.