Detection of SSL/TLS Implementation Errors in Android Applications

Security Socket Layer (SSL) / Transport Layer Security (TLS) protocols are utilized to secure network communication (e.g., transmitting user data). Failing to properly implement SSL/TLS configuration during the app development results in security risks. The weak implementations include trusting all host names, trusting all certificates, ignoring certificate verification errors, even lack of SSL public key pinning usage. These unsecured implementations may cause ManIn-The-Middle (MITM) attacks. The major aim of this research is to detect configuration errors of SSL/TLS implementation in Android apps. It consists of the common use of existing open source tools in the static analysis phase and the combination of manual method in the dynamic analysis phase. During the static analysis phase, dynamic analysis of the findings obtained by scanning four types of vulnerabilities is used to verify the abuse status of SSL/TLS by testing. The dynamic analysis is essential for eliminating false positives generated at the static analysis stage. We analyze 109 apps from Google Play Store and the experimental results show that 45 (41.28%) apps contain potential security errors in the application of SSL/TLS. We verify that 19 (17.43%) out of 109 apps are vulnerable to MITM attacks