First Flight #21: KittyFi

Relevant GitHub Links

https://github.com/Cyfrin/2024-08-kitty-fi/blob/main/src/KittyPool.sol#L45-L48

Summary

The contract does not thoroughly validate the existence of tokens, leading to potential security vulnerabilities.

Vulnerability Details

The tokenExists modifier checks if a token's associated vault exists by verifying the non-zero address of the vault. However, this check is insufficient as it does not ensure the vault is pointing to a legitimate and intended contract, leaving room for misconfiguration or attack vectors.

Impact

This vulnerability could lead to unauthorized minting or manipulation of vaults, which could compromise the integrity of the system and lead to loss of funds or incorrect collateral management.

Tools Used

Manual

Recommendations

Enhance the tokenExists modifier to include additional checks, such as verifying the type and legitimacy of the vault contracts, to prevent misconfigurations or potential attacks.