Tadle

Vulnerability Details:

In the PreMarkets contract, the offerId is incremented without any safeguards against potential overflow:

If the offerId reaches its maximum value (2^256 - 1 for uint256), it will wrap around to zero upon the next increment.

Impact:

An overflow in offerId can lead to the reuse of previously assigned IDs, which might result in conflicts within the offer management system. This could corrupt data structures, compromise the system's integrity, and potentially cause severe operational issues.

Proof of concept :

The vulnerability is demonstrated in the following example:
Link to code

Link to code

Tools Used

Recommendations:

Safe Arithmetic: Incorporate OpenZeppelin's SafeMath library to prevent overflows and ensure safe arithmetic operations.

Limit Enforcement: Introduce a maximum cap for offerId and implement logic to handle situations when this cap is reached, preventing overflow and maintaining system integrity.