You studied how to intercept iOS application traffic in iDevice or iOS Simulator over HTTP and HTTPS. However, what's next with this setup? What could be the possible attack vectors after intercepting the traffic? The answer is that all attacks are applicable for web applications. I will encourage you to go through OWASP Top 10 Web Application Risks in order to understand various attack vectors, if you are not familiar with web app pentesting.
Let's study a simple brute force attack. Consider an iOS application that has login functionality and communicates with backend web APIs to check whether the provided login credentials are valid or not. The following steps will help you in understanding a web application attack such as the brute force for iOS application, which uses web API for login:
Let's assume an iOS application that has the login page. Once the user enters the credentials, it is checked with the backend web API components and then the user gets logged in if a...