Submission Details
Severity:
If stream is created with malicious ERC20 implementation, `tokenURI` may always revert
Summary
If stream is created with malicious ERC20 implementation, tokenURI may always revert, because the implementation may return gas bomb on safeAssetSymbol:
function safeAssetSymbol(address asset) internal view returns (string memory) {
(bool success, bytes memory returnData) = asset.staticcall(abi.encodeCall(IERC20Metadata.symbol, ()));
// Non-empty strings have a length greater than 64, and bytes32 has length 32.
if (!success || returnData.length <= 64) {
return "ERC20";
}
string memory symbol = abi.decode(returnData, (string));
// The length check is a precautionary measure to help mitigate potential security threats from malicious assets
// injecting scripts in the symbol string.
if (bytes(symbol).length > 30) {
return "Long Symbol";
} else {
return symbol;
}
}
Impact
tokenURI DoS for the given stream
Tools Used
Manual Review
Recommendations
Limit the forwarded gas on (bool success, bytes memory returnData) = asset.staticcall(abi.encodeCall(IERC20Metadata.symbol, ())); call
Prize pool breakdown
Total prize
53,440 USDC
nSLOC
2,65520
USDC / LOC
45,000 USDC
3,100 USDC
5,340 USDC
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