Christmas Dinner

Summary

The changeParticipationStatus() function allows users to toggle their participation status without any restrictions or cooldown period. This lack of rate limiting enables malicious participants to rapidly change their status, which can disrupt event planning and potentially cause denial of service by constantly changing the participant count.

Vulnerability Details

The changeParticipationStatus() function allows users to toggle their participation status without any restrictions, such as rate limiting or cooldown periods. This lack of control enables malicious users to rapidly change their status, disrupting event planning by artificially manipulating participant numbers. The event host cannot accurately plan, and the excessive state changes increase gas costs. This creates a potential attack vector for griefing, where malicious participants can repeatedly flip their status, destabilizing the event's planning process.

Impact

• Event planning becomes unreliable as participant counts can be artificially manipulated

• Host cannot accurately plan for the event due to unstable participant numbers

• Increased gas costs for the contract due to excessive state changes

• Event management becomes challenging as participants can change status unlimited times

• Potential griefing attack vector where a malicious user could programmatically flip their status to disrupt planning

Tools Used

Foundry

Recommendations

• Implement a cooldown period between status changes.

• Consider implementing a maximum number of status changes per address.

• Add a small fee for changing status multiple times to discourage abuse.