The presentation focuses on revealing a fuzzing approach that can be used to uncover different types of vulnerabilities inside multiple core system components of the Android OS. The session will be targeted on exposing the general idea behind this approach and how it applies to several real-life targets from the Android OS, with examples of actual discovered vulnerabilities. These vulnerabilities affect critical components of the Android OS and the audience will have the opportunity to learn about the way they were discovered and possible exploit scenarios. The most important targets that will be included in the talk: the Android APK installer and the Stagefright media framework.