Unchecked that address to is not 0

[code423n4]

Lines of code

https://github.com/code-423n4/2023-01-numoen/blob/2ad9a73d793ea23a25a381faadc86ae0c8cb5913/src/core/Pair.sol#L116

Vulnerability details

Impact

Sanity checks checking that funds are not going to the burn address should be done. In this case in the function swap, funds will not burn because you have to return the flashloan but the check should be made

Tools Used

manual

Recommended Mitigation Steps

add a require statement:

require(to =! address(0));

[berndartmueller]

Providing address(0) as the to parameter is considered a user error. Closing as overinflated severity.

[c4-judge]

berndartmueller marked the issue as unsatisfactory: Overinflated severity