KIBToken: Unexpected reverts of _calculateCumulativeYield & _calculatePreviousEpochCumulativeYield

Lines of code Vulnerability details Impact In KIBToken the calculateCumulativeYield & calculatePreviousEpochCumulativeYield functions intend to calculate the yields using the formula yield.rayPowtime.rayMulcumulativeYield. function calculateCumulativeYield private view returns uint256 uint256...

Price feed in MCAGRateFeed#getRate is not sufficiently validated and can return stale price

Lines of code Vulnerability details Impact MCAGRateFeedgetRate may return stale data Proof of Concept , int256 answer,,, = oracle.latestRoundData; Classic C4 issue. getRate only uses answer but never checks the freshness of the data, which can lead to stale bond pricing data. Stale pricing data c...

KIBToken._transfer() did not correctly handle the case where from is the same as to

Lines of code Vulnerability details Impact Hackers can obtain any number of KIB tokens out of thin air. Using the stolen KIB tokens, the hacker could steal all the bonds in the KUMASwap by calling KUMASwap.buyBond, or steal all the deprecationStableCoin in the KUMASwap by calling...

Inexistent Slippage Protection

Lines of code Vulnerability details Impact All bond evaluations are dynamic within the KUMASwap::sellBond and KUMASwap::buyBond functions, however, they operate with token IDs as input arguments and do not perform any sanitization on the amount of KIB tokens minted or burned respectively. In turn...

Unnecessary precision loss in redeemKIBT()

Lines of code Vulnerability details Impact Unnecessary precision loss in redeemKIBT Proof of Concept If enter Deprecated mode, user can switch back to StableCoin by percentage with redeemKIBT The redeemKIBT implementation code is as follows: function redeemKIBTuint256 amount external override...

TRANSFERING KIBToken TO YOURSELF INCREASES YOUR BALANCE

Lines of code Vulnerability details Impact using temporary variables to update balances is a dangerous construction. If transferred to yourself, it will cause your balance to increase, thus growing the token balance infinitely Proof of Concept KIBToken overrides transfer to perform the transfer o...

TRANSFERING KIBToken TO YOURSELF INCREASES YOUR BALANCE

Lines of code Vulnerability details Impact using temporary variables to update balances is a dangerous construction. If transferred to yourself, it will cause your balance to increase, thus growing the token balance infinitely Proof of Concept KIBToken overrides transfer to perform the transfer o...