And now it's official – the first detected malware taking advantage of the vulnerability has been intercepted by Symantec whilst running amok in China...
Source: http://www.phonearena.com/news/Malware-using-the-Android-Master-Key-intercepted-in-the-wild-heres-how-to-protect-yourself_id45669
Source: http://www.phonearena.com/news/Malware-using-the-Android-Master-Key-intercepted-in-the-wild-heres-how-to-protect-yourself_id45669