Summary

The sqrt function in the MathMasters library lacks input validation, leaving it vulnerable to unexpected results when negative values are passed as inputs.

Vulnerability Details

The vulnerability lies in the absence of input validation for the sqrt function, allowing the possibility of negative values being passed. As a result, the function may produce inaccurate or undefined results when attempting to calculate the square root of a negative number.

POC

Impact

If negative values are provided as inputs to the sqrt function, it can lead to unexpected behavior, potential runtime errors, or incorrect output. The lack of input validation poses a risk to the reliability and correctness of the smart contract utilizing this library.

Tools Used

No specific tools were used to identify this vulnerability. Manual code review and analysis were conducted.

Recommendations

It is strongly recommended to implement input validation within the sqrt function to ensure that only valid and non-negative values are accepted. Adding a check to verify that the input is greater than or equal to zero will enhance the robustness of the function and prevent undesired outcomes. The implementation should include appropriate error handling mechanisms to handle invalid inputs gracefully.

Input validation should be added at the beginning of the sqrt function, checking that x is greater than or equal to zero. Additionally, proper error handling should be implemented to handle cases where negative values are detected, providing informative feedback or reverting the transaction to prevent unexpected behavior.