An anonymous reader writes: Security research firm Check Point has released information about a new vulnerability called Certifi-gate, which they say compromises the security of hundreds of millions of Android devices. The flaw exists within the mobile Remote Support Tools, which are intended to enable screen sharing and simulated taps for tech support purposes. Unfortunately, the way mRSTs validate the remote operator is easy to exploit. Because the software is designed to allow both monitoring of a device's screen and simulated input, the potential for misuse is quite serious. The flaw was disclosed to manufacturers a month ago. HTC, for one, has confirmed it is already starting to roll out a fix.