webPromedium

CartBlitz — Race Condition in Promo Code Redemption

hackadvisor

Task: E-commerce platform with $50 single-use promo code, need $200 for VIP product containing flag. Solution: TOCTOU race condition on promo redemption (3×$50=$150) combined with negative quantity cart exploit to inflate wallet above $200.

race_condition toctou nodejs business_logic nginx express decoy_flag ecommerce negative_quantity promo_code wallet cart_manipulation

race_condition_exploitationbusiness_logic_bypassthread_barrier_synchronizationsession_cookie_sharingnegative_quantity_cart_abuse

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race_condition toctou nodejs business_logic nginx express decoy_flag ecommerce negative_quantity promo_code wallet cart_manipulation

race_condition_exploitationbusiness_logic_bypassthread_barrier_synchronizationsession_cookie_sharingnegative_quantity_cart_abuse

Analysis

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

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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