MultiSig Timelock
First Flight #55
Beginner FriendlyWallet
100 EXP
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Submission Details
Impact: low
Likelihood: low
Invalid

No Upgrade Mechanism or Emergency Pause Functionality

stevenalenga

Description

  • The contract does not implement any upgrade mechanism (such as proxy pattern) or emergency pause functionality.

  • If a critical vulnerability is discovered after deployment, there is no way to pause operations or upgrade the contract logic to fix the issue. All funds would need to be migrated to a new contract manually.

@> // No pause functionality
@> // No upgrade mechanism
@> // No emergency withdrawal function
​
contract MultiSigTimelock is Ownable, AccessControl, ReentrancyGuard {
// ... contract code ...
}

Risk

Likelihood:

  • When a critical vulnerability is discovered post-deployment

  • When the contract needs to be upgraded with new features or fixes

  • During emergency situations requiring immediate action

Impact:

  • No ability to pause contract operations during an emergency

  • Cannot upgrade contract logic if vulnerabilities are found

  • Must deploy entirely new contract and migrate funds manually

  • Users must trust that no critical bugs exist since there's no recovery mechanism

Proof of Concept

function testNoPauseOrUpgradeMechanism() public {
// If a vulnerability is discovered, there's no way to pause
// No emergency stop mechanism exists
// Can only deploy new contract and migrate funds
// This requires coordinating all signers and moving funds
}

Recommended Mitigation

+ import {Pausable} from "@openzeppelin/contracts/utils/Pausable.sol";
​
- contract MultiSigTimelock is Ownable, AccessControl, ReentrancyGuard {
+ contract MultiSigTimelock is Ownable, AccessControl, ReentrancyGuard, Pausable {
​
+ bytes32 private constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
+
+ constructor() Ownable(msg.sender) {
+ // ... existing constructor code ...
+ _grantRole(PAUSER_ROLE, msg.sender);
+ }
​
+ function pause() external onlyRole(PAUSER_ROLE) {
+ _pause();
+ }
​
+ function unpause() external onlyRole(PAUSER_ROLE) {
+ _unpause();
+ }
​
function proposeTransaction(address to, uint256 value, bytes calldata data)
external
nonReentrant
+ whenNotPaused
noneZeroAddress(to)
onlyOwner
returns (uint256)
{
return _proposeTransaction(to, value, data);
}
​
function executeTransaction(uint256 txnId)
external
nonReentrant
+ whenNotPaused
onlyRole(SIGNING_ROLE)
transactionExists(txnId)
notExecuted(txnId)
{
_executeTransaction(txnId);
}
​
+ /**
+ * @dev Emergency function to recover funds if contract is paused
+ * Requires consensus from all current signers
+ */
+ function emergencyWithdraw(address payable to)
+ external
+ whenPaused
+ onlyOwner
+ {
+ // Could add additional signature requirements here
+ uint256 balance = address(this).balance;
+ (bool success,) = to.call{value: balance}("");
+ require(success, "Emergency withdrawal failed");
+ }
Updates

Lead Judging Commences

kelechikizito Lead Judge 4 days ago
Submission Judgement Published
Invalidated
Reason: Known issue

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