Submission Details
Severity:
Users can self delegate on BoostController::delegateBoost
Summary
The delegateBoost function allows users to delegate their veToken boost to another address for a specified duration. However, there is no check to prevent a user from delegating to themselves, which could be exploited to gain unintended advantages.
Vulnerability Details
function delegateBoost(
address to,
uint256 amount,
uint256 duration
) external override nonReentrant {
if (paused()) revert EmergencyPaused();
if (to == address(0)) revert InvalidPool();
if (amount == 0) revert InvalidBoostAmount();
if (duration < MIN_DELEGATION_DURATION || duration > MAX_DELEGATION_DURATION)
revert InvalidDelegationDuration();
uint256 userBalance = IERC20(address(veToken)).balanceOf(msg.sender);
if (userBalance < amount) revert InsufficientVeBalance();
UserBoost storage delegation = userBoosts[msg.sender][to];
if (delegation.amount > 0) revert BoostAlreadyDelegated();
delegation.amount = amount;
delegation.expiry = block.timestamp + duration;
delegation.delegatedTo = to;
delegation.lastUpdateTime = block.timestamp;
emit BoostDelegated(msg.sender, to, amount, duration);
}
The function does not restrict users from delegating to their own address:
Impact
Tools Used
Manual Review
Recommendations
Add a Check to Prevent Self-Delegation
Prize pool breakdown
Total prize
77,280 USDC
nSLOC
3,86420 USDC / LOC
74,000
3,280
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