It was recently reported that a 4 year old bug could put 99% of all the Android devices in the world at risk for malware infection due to an exploit called Masterkey. Evidently Google has known about this vulnerability since February of 2013 but decided to put the fix into new software updates rather than offer an individual patch right away.
That means any Android device that hasn’t received a new software rollout since February is potentially left wide open to this malware infection.
Google released a statement yesterday claiming they scan every app for the Masterkey exploit before they allow them into the play store., so Android users have nothing to fear.
If you want to scan your android device just to be sure, you can go to Google Play and install the Bluebox Security Scanner application from there. The app will let you know if your device has already been patched.
If you are one of the unlucky users who haven’t been patched, there’s not much you can do but wait until a patch is released other than remain extra careful in regards to new application installations, especially if they come from sources outside the Google Marketplace.