AppSeer: discovering flawed interactions among Android components

We identify several reliability issues arising from interactions between components of system-defined Android apps and components of third-party apps. These issues are generally caused by incorrect assumptions that system apps make about the behavior of third-party apps, resulting in significant vulnerabilities in system apps. For instance, it is possible for a third-party app to make many system applications to crash, including the Phone app used to make and receive phone calls, the Settings app used to configure a mobile device, and several other apps that expose a so-called started service. Our findings indicate that additional automated tools for integration testing and static analysis of Android apps are in order. Here we discuss AppSeer, a toolset that automatically detects vulnerabilities of system apps and third-party apps. Preliminary precision and recall results for AppSeer are quite encouraging.