Dria

Swan
NFTHardhat
21,000 USDC
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Submission Details
Severity: medium
Invalid

Reentrancy attack

Summary : Reentrancy is a type of attack where a contract calls another contract, and the called contract then calls back into the original contract, potentially causing unintended behavior.

Vulnerability Details : To prevent reentrancy attacks, you can use a reentrancy lock or a non-reentrant modifier.

Impact : Reentrancy is a type of attack where a contract calls another contract, and the called contract then calls back into the original contract, potentially causing unintended behavior.

Tools Used : Slither, VS code

Recommendations : A reentrancy lock is a mechanism that prevents a contract from calling itself recursively. You can implement a reentrancy lock using a boolean variable that is set to true when the contract is executing, and set to false when the contract has finished executing.

Here's an example of how you can modify the LLMOracleCoordinator contract to use a reentrancy lock:

contract LLMOracleCoordinator {
bool private locked;
function request(bytes32 _taskId, bytes _input, bytes _params, LLMOracleTaskParameters _taskParams) public {
require(!locked, "Reentrancy attack detected");
locked = true;
// ...
require(feeToken.transferFrom(msg.sender, address(this), totalfee), "Transfer failed");
// ...
locked = false;
}

}

Updates

Lead Judging Commences

inallhonesty Lead Judge 8 months ago
Submission Judgement Published
Invalidated
Reason: Known issue

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