Doing things on-device is never a good idea. It means, sometimes they opt-out validating previously purchased items on app start, therefore leaving an open door for any malicious actor. ![]() ![]() Sometimes applications try to use shortcuts and do not follow full instructions and recommendations by Google. You can read more on implementation details here: Problem This allows purchased items to be shared across the devices.īut what about Huawei where Google Play Services is not running/available? Huawei provides an almost identical In-App Purchases (IAP) API, although user can’t transfer their purchases and subscriptions between platforms. Once bought with the user’s Google account it is stored forever on the Google server with its unique purchase id. Lots of Android apps offer in-app purchases to users for the premium features or some kind of tokens for games, etc. I rewrote the bytecode to unlock premium features of the app on my device and now I will show you how to prevent it from happening to your apps.ĭo not download APKs from random websites, as they might have injected bytecode and potentially steal the data from device. ![]() This blog is for EDUCATIONAL PURPOSES only as it exposes common vulnerabilities in Android applications.
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