Potential privacy vulnerabilities in android data sharing between applications

High-performance smartphones have enabled people to accomplish diverse types of work thanks to apps which provide unprecedented portability and convenience. Unlike PCs, smartphones are constantly on and connected with the Internet via WiFi or mobile communication networks. Nonetheless, such convenience also sets up an environment favorable for attackers as well, possibly leading to the leakage of user sensitive information in real-time. In this paper, we analyzed the vulnerabilities of ContentProviders, and how it is able to leak the data of other apps. In order to show the risk of illegal leakage of personal data stored in other apps, we created a proof-of-concept malicious application by using the potential vulnerabilities which may be exploited by attackers. Then, we proposed countermeasures to address the vulnerabilities of ContentProviders.