Submission Details
Severity:
Incorrect minted amount of DebtToken
Summary
The mint function is calculating the amount to mint as follows:
uint256 amountToMint = amount + balanceIncrease;
//@audit mint amount
_mint(onBehalfOf, amountToMint.toUint128());
This is not correct because the balance increase is the implicit accrued interest due to an increasing usage index, crediting that in the balance would unfairly increase users' debt.
Vulnerability Details
Impact
Incorrect accrued interest.
Tools Used
Manual review.
Recommendations
Do not include the balance increase in the minted tokens.
Updates
Lead Judging Commences
inallhonesty 4 months ago
Submission Judgement Published Assigned finding tags:
DebtToken::mint miscalculates debt by applying interest twice, inflating borrow amounts and risking premature liquidations
Prize pool breakdown
Total prize
77,280 USDC
nSLOC
3,86420 USDC / LOC
74,000
3,280
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