Adversaries may register Uniform Resource Identifiers (URIs) to intercept sensitive data.
Adversaries may register Uniform Resource Identifiers (URIs) to intercept sensitive data.
Applications regularly register URIs with the operating system to act as a response handler for various actions, such as logging into an app using an external account via single sign-on. This allows redirections to that specific URI to be intercepted by the application. If an adversary were to register for a URI that was already in use by a genuine application, the adversary may be able to intercept data intended for the genuine application or perform a phishing attack against the genuine application. Intercepted data may include OAuth authorization codes or tokens that could be used by the adversary to gain access to protected resources.(Citation: Trend Micro iOS URL Hijacking)(Citation: IETF-PKCE)