pentest-race-conditions

Race condition vulnerabilities occur when concurrent web requests bypass sequential checks, causing inconsistent states or duplicate actions in operations like coupon redemption or balance transfers by exploiting timing gaps between check and use.

You can reproduce TOCTOU vulnerabilities by sending parallel requests to a target API using standard tooling like Python aiohttp or parallel execution utilities, validating the presence and impact of concurrency flaws through a documented, repeatable workflow.

No, you do not strictly need Burp Suite Turbo Intruder; Python asyncio, aiohttp, and other parallel execution utilities are also standard tooling options for coordinating multi-step timing attacks and reproducing race conditions.

Operations prone to TOCTOU and race condition attacks include balance transfers, coupon redemption, purchases, votes, and token generation, where concurrent execution can bypass security checks or cause duplicate actions.

Yes, this approach provides structured guidance to document impact and remediation steps, capturing evidence of concurrency flaws through reproducible workflows during authorized security assessments.