Liquid Staking
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DeFiHardhatOracle
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Submission Details
Severity: medium
Invalid

`PriorityPool` Will Unilaterally Unpause On `updateDistribution`

auditweiler

Summary

Calling updateDistribution will unconditionally unpause the PriorityPool.

Vulnerability Details

When the DistributionOracle calls updateDistribution on the PriorityPool, the pool is unpaused:

function updateDistribution(
bytes32 _merkleRoot,
bytes32 _ipfsHash,
uint256 _amountDistributed,
uint256 _sharesAmountDistributed
) external onlyDistributionOracle {
@> _unpause();
depositsSinceLastUpdate -= _amountDistributed;
sharesSinceLastUpdate -= _sharesAmountDistributed;
merkleRoot = _merkleRoot;
ipfsHash = _ipfsHash;
merkleTreeSize = accounts.length;
emit UpdateDistribution(
_merkleRoot,
_ipfsHash,
_amountDistributed,
_sharesAmountDistributed
);
}

https://github.com/Cyfrin/2024-09-stakelink/blob/f5824f9ad67058b24a2c08494e51ddd7efdbb90b/contracts/core/priorityPool/PriorityPool.sol#L491C9-L491C20

However, the pool is unpaused irrespective of the pause conditions - remember that the DistributionOracle has the ability to permissionlessly pause the protocol based upon a set of predefined conditions:

if (upkeepType == UpkeepType.PAUSE) {
@> if (priorityPool.depositsSinceLastUpdate() < minDepositsSinceLastUpdate)
@> revert UpdateConditionsNotMet();
@> _pauseForUpdate();
}

https://github.com/Cyfrin/2024-09-stakelink/blob/f5824f9ad67058b24a2c08494e51ddd7efdbb90b/contracts/core/priorityPool/DistributionOracle.sol#L133C12-L135C31

Therefore, when the DistributionOracle calls updateDistribution, the PriorityPool can be immediately placed back into an unpaused state even when the pool satisfies the pause condition i.e.:

priorityPool.depositsSinceLastUpdate() < minDepositsSinceLastUpdate

Impact

The pool can immediately be re-paused after a successful call to updateDistribution, stopping users from unqueueing.

Tools Used

Manual Review

Recommendations

Calls to updateDistribution should revert if the pool fails to satisfy the priority fee settings of the DistributionOracle.

Updates

Lead Judging Commences

inallhonesty Lead Judge
8 months ago
inallhonesty Lead Judge 8 months ago
Submission Judgement Published
Invalidated
Reason: Incorrect statement

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