4 writeups

picoCTF - Blockchain

picoCTF blockchain and smart-contract challenge writeups.

picoCTF - Blockchain

Access_Control Writeup

picoCTF Access Control writeup exploiting an unprotected owner-setter function in a Solidity smart contract to claim ownership and reveal the flag.

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picoCTF - Blockchain

Front_Running Writeup

picoCTF Front Running writeup monitoring the mempool for pending transactions, extracting the plaintext solution, and front-running with higher gas price.

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picoCTF - Blockchain

Reentrance Writeup

picoCTF Reentrance writeup deploying an attacker contract to exploit the classic reentrancy vulnerability and drain the bank contract to zero.

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picoCTF - Blockchain

Smart_Overflow Writeup

picoCTF Smart Overflow writeup triggering a uint256 integer overflow in unchecked Solidity arithmetic to satisfy the flag reveal condition.

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