As you might know hacker Comex has found a new PDF vulnerability and released JailBreakMe tool that uses it. These were great news. The bad ones is that your iPhone and iPad and iPod Touch is at risk. Bad guys can use the same vulnerability to take control of your device and do whatever they want with it.
Apple will fix it in iOS 4.3.4 firmware some day. Fortunately Comex has already released a patch for his JailbreakMe 3.0 exploit to protect already jailbroken devices from any malicious use of the exploit.