Throttle

alfactf

Task: Marketplace with gift certificates and expensive service requiring ~3.3M balance. Solution: Race condition on certificate creation - parallel requests bypass balance check, allowing unlimited certificate generation and redemption to accumulate funds.

race_condition toctou parallel_requests fastapi react gift_certificates balance_manipulation marketplace

Race Condition on certificate creationTOCTOU (Time-of-check to time-of-use)Parallel HTTP requests to bypass balance check

$ ls tags/ techniques/

race_condition toctou parallel_requests fastapi react gift_certificates balance_manipulation marketplace

Race Condition on certificate creationTOCTOU (Time-of-check to time-of-use)Parallel HTTP requests to bypass balance check

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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