Submission Details
Severity:
generating a random number on-chain - randomness vulnerability
Summary
Anyone is able to get the needed index
Vulnerability Details
A malicious actor can copy the lines that calculate random numbers, and get the index they need, and call the selectWinner function when they need to become a winner
Impact
Anyone could cheat and win all raffles
Tools Used
hardhat
Recommendations
For generating a random number use off-chain oracles or services specifically for this
Updates
Lead Judging Commences
Hamiltonite about 2 years ago
Submission Judgement Published Assigned finding tags:
weak-randomness
Root cause: bad RNG Impact: manipulate winner
Rewards breakdown
nSLOC
143This contest has a flat reward structure with the following payouts:
100 EXP
20 EXP
2 EXP
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