Security Research // Business Logic
Reverse Engineering & Logic Architecture
Fortune 500 Automotive Platform // Client Trust Boundaries
Analyzed the client-side architecture of a Fortune 500 automotive staging platform. Successfully reverse-engineered the geofencing logic and payment state management to demonstrate how "Trusting the Client" leads to business logic bypasses.
RESPONSIBLY DISCLOSED
Technical Details
- Mapped trust boundaries across client state, browser storage, and UI-gated flows to identify where security decisions were enforced only in the frontend.
- Reverse-engineered geofencing checks by tracing location-derived branches and identifying assumptions that could be influenced by client-controlled signals.
- Analyzed payment state management as a state machine to pinpoint transitions that should be server-authoritative, not client-authoritative.
- Converted findings into hardened patterns: server-validated state, signed/verified claims, and explicit authorization checks at every sensitive transition.
Impact Assessment
- Demonstrated how client-trusted state can enable business-logic bypasses even when the UI appears locked down
- Produced actionable remediation guidance focused on server-authoritative workflows and consistent authorization
- Designed reusable secure state-management patterns to apply across client projects
- Improved risk communication by framing technical findings in terms of business impact and abuse paths
Technologies & Tools
Reverse EngineeringThreat ModelingState MachinesGeofencingReact DevToolsBurp Suite
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