Submission Details
Severity:
Weak Commit Hash Scheme (Front-Running Risk)
Summary
Commitment does not bind sender identity, making brute-force and front-running possible.
Vulnerability Details
Commit hash is generated using:
keccak256(abi.encodePacked(move, salt));
Impact
Player can potentially impersonate another commit
Commit reuse across games undermines privacy
Tools Used
Manual review
Recommendations
Change hash to include sender address:
keccak256(abi.encodePacked(msg.sender, move, salt));
Updates
Appeal created
m3dython about 1 month ago
Submission Judgement Published Assigned finding tags:
Lack of Salt Uniqueness Enforcement
The contract does not enforce salt uniqueness
Rewards breakdown
nSLOC
349This contest has a flat reward structure with the following payouts:
100 EXP
20 EXP
2 EXP
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