Mobile security firm Zimperium Inc. has released an app for Android users to detect the presence of the Stagefright vulnerability in their phones.
Zimperium, who discovered the exploit, calls the vulnerability "extremely dangerous", as it doesn't require an affected user to take any action to be taken advantage of. The tool, which is available on Google Play, will let you know if your phone is at risk.
The bug is particularly troublesome because to execute an attack, an attacker only needs your mobile number. From there, they can remotely execute code using a "specially crafted media file" delivered through MMS.