Summary

There is a potential underflow in _burnDsc function

Vulnerability Details

In the _burnDsc function, there's a possibility of underflow when subtracting the amountDscToBurn from s_DSCMinted[onBehalfOf]. If the amountDscToBurn is greater than the user's s_DSCMinted[onBehalfOf], it will result in an underflow.

The result of this is that all functions such as burnDsc calling the _burnDsc function may underflow.

Impact

It causes excessive burning of Dsc tokens.

Tools Used

Manual review

Recommendations

Use OpenZeppelin's SafeMath for arithmetic operations.