Submission Details
Severity:
Loss of precision
Summary
Division by potentially large numbers.
Vulnerability Details
There are 5 instances of this issue.
File: src/Lender.sol
246: uint256 loanRatio = (debt * 10 ** 18) / collateral;
384: uint256 loanRatio = (totalDebt * 10 ** 18) / loan.collateral;
475: uint256 currentAuctionRate = (MAX_INTEREST_RATE * timeElapsed) /
618: uint256 loanRatio = (debt * 10 ** 18) / collateral;
| File Link | Instance Count | Instance Links |
|---|---|---|
| Lender.sol | 4 | 246,384,475,618 |
File: src/Staking.sol
68: uint256 _ratio = _diff * 1e18 / totalSupply;
| File Link | Instance Count | Instance Link |
|---|---|---|
| Staking.sol | 1 | 68 |
Impact
Division by large numbers may result in the result being zero, due to Solidity not supporting fractions.
Tools Used
baudit: a custom static code analysis tool; manual review
Recommendations
Consider requiring a minimum amount for the numerator to ensure that it is always larger than the denominator.
Prize pool breakdown
Total prize
20,000 USDC
nSLOC
70628 USDC / LOC
18,000 USDC
2,000 USDC
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