Description:

The unstake function lacks an emergency stop mechanism, which is crucial for halting contract operations in case of an exploit or other urgent issues. Without this mechanism, it is difficult to stop the contract’s operations if a vulnerability is discovered, potentially locking funds or allowing further damage.

Impact:

The absence of an emergency stop mechanism means that if a critical vulnerability or exploit is found, the contract cannot be paused to prevent further damage or loss of funds. This could result in a prolonged period of exposure to risks or exploitation, impacting the security and stability of the protocol.

Proof of Concept:

To demonstrate this vulnerability, deploy the contract and simulate an exploit scenario. Without an emergency stop mechanism, even if a serious issue is detected, no immediate action can be taken to halt the contract and protect funds.

Recommended Mitigation:

Implement an emergency stop mechanism, such as a circuit breaker, to allow the contract owner or a designated authority to pause critical functions in the event of an exploit. This can be achieved by adding a paused state variable and modifying the relevant functions to check this state.

Here’s an example of how to implement it: