Google Play Billing

[Conference] BSides Dublin 2019 – Abusing Google Play Billing for fun and unlimited credits!

The March 23th, Guillaume Lopes gave a talk at BSides Dublin about how to bypass the payment on Google Play Billing API. Synopsis: In 2017, the estimated global in-app purchase revenue was projected to exceed $37 billion. Just in the Google Play Store, for 2018, more than 200 000 apps are offering in-app purchases. However, the Google Play Billing API is not offering a sufficient level of protection in order to ensure the security of the payment transactions.

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Get Freebies by Abusing the Android InApp Billing API

As Google defines it “Google Play Billing is a service that lets you sell digital content from inside an Android app, or in-app.“ It can be used to sell one-time products like additional game levels, premium loot boxes, media files or subscriptions like online magazines or music streaming services. But what could possibly go wrong when this service is doing client side validation ? Guillaume worked on this for Checkmarx and published a complete blog post explaining the results and the detailed steps to bypass the InApp Billing process and obtain unlimited credits: https://www.

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