Mark Wilson writes: We've already looked at the Stagefright vulnerability, discovered by Zimperium, and shown what can be done to deal with it. Affecting up to 95 percent of Android devices, the vulnerability has led to Google and Samsung announcing monthly security updates. Now the mobile security company has released additional details about how the exploit works. To help explain the vulnerability, a video has been produced which uses a Stagefright demonstration to illustrate it in action. Zimperium has also released an Android app that checks devices for the vulnerability.