Aave DIVA Wrapper

Summary: https://github.com/Cyfrin/2025-01-diva/blob/main/contracts/src/WToken.sol

The _owner address, which controls critical functionality (mint and burn), is immutable after deployment. This rigidity can cause operational issues if the _owner:

Loses access to their private key.

Wishes to delegate control to another entity.

Needs to accommodate organizational changes or upgrades.

Impact

The contract functionality itself remains secure and functional, however, operational flexibility is hindered, making this a bug under best practices for contract governace.

Tools Used

Manual Review

Recommendations

Implement a transferOwnership function as explained earlier:

function transferOwnership(address newOwner) external onlyOwner { require(newOwner != address(0), "WToken: new owner cannot be the zero address"); _owner = newOwner; }

This issue introduces operational risks due to the rigidity of ownership management.