Submission Details
Severity:
Minting to zero address in donate()
Summary
In donate function we mint an NFT, but it doesn't check minting to a zero address.
Vulnerability Details
function donate(address charity) public payable {
require(registry.isVerified(charity), "Charity not verified");
(bool sent,) = charity.call{value: msg.value}("");
require(sent, "Failed to send Ether");
_mint(msg.sender, tokenCounter);
// Create metadata for the tokenURI
string memory uri = _createTokenURI(msg.sender, block.timestamp, msg.value);
_setTokenURI(tokenCounter, uri);
tokenCounter += 1;
}
Impact
NFTs can be minted to an zero address resulting permanenty NFTs loss.
Tools Used
Manua Review
Recommendations
Add a check fo zero address.
require(charity != address(0), "Invalid charity address");
function donate(address charity) public payable {
require(charity != address(0), "Invalid charity address");
require(registry.isVerified(charity), "Charity not verified");
(bool sent,) = charity.call{value: msg.value}("");
require(sent, "Failed to send Ether");
_mint(msg.sender, tokenCounter);
// Create metadata for the tokenURI
string memory uri = _createTokenURI(msg.sender, block.timestamp, msg.value);
_setTokenURI(tokenCounter, uri);
tokenCounter += 1;
}
Rewards breakdown
nSLOC
67This contest has a flat reward structure with the following payouts:
100 EXP
20 EXP
2 EXP
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