Core Contracts
Regnum Aurum Acquisition Corp
HardhatReal World AssetsNFT
77,280 USDC
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Submission Details
Severity: high
Valid

People can lose RAAC tokens if they call lock more than once

lyuboslav

Summary

Users can lock RAAC tokens in order to obtain veRAAC tokens. veRAACToken contract implements that with lockfn. Unfortunately, the fn doesnt check if the user has already lock, which will cause the override previous lock details and lose the ability to withdraw previous locked tokens.

Vulnerability Details

The lock() function lacks validation for existing user locks. When a user calls lock() multiple times:

  • Previous lock data gets overwritten

  • Original locked tokens become permanently trapped

  • Total locked token accounting becomes inaccurate

function lock(uint256 amount, uint256 duration) external nonReentrant whenNotPaused {
if (amount == 0) revert InvalidAmount();
if (amount > MAX_LOCK_AMOUNT) revert AmountExceedsLimit();
if (totalSupply() + amount > MAX_TOTAL_SUPPLY) revert TotalSupplyLimitExceeded();
if (duration < MIN_LOCK_DURATION || duration > MAX_LOCK_DURATION)
revert InvalidLockDuration();
​
// no check if the user has already locked tokens
​
// Do the transfer first - this will revert with ERC20InsufficientBalance if user doesn't have enough tokens
raacToken.safeTransferFrom(msg.sender, address(this), amount);

Impact

  • Previously locked tokens become unrecoverable

  • No mechanism to track or recover overwritten locks

Tools Used

Manual review

Recommendations

function lock(uint256 amount, uint256 duration) external nonReentrant whenNotPaused {
if (amount == 0) revert InvalidAmount();
if (amount > MAX_LOCK_AMOUNT) revert AmountExceedsLimit();
if (totalSupply() + amount > MAX_TOTAL_SUPPLY) revert TotalSupplyLimitExceeded();
if (duration < MIN_LOCK_DURATION || duration > MAX_LOCK_DURATION)
revert InvalidLockDuration();
​
+ if (_lockState.locks[msg.sender].amount > 0) revert ExistingLockFound();
​
// Do the transfer first - this will revert with ERC20InsufficientBalance if user doesn't have enough tokens
raacToken.safeTransferFrom(msg.sender, address(this), amount);
Updates

Lead Judging Commences

inallhonesty Lead Judge 4 months ago
Submission Judgement Published
Validated
Assigned finding tags:

veRAACToken::lock called multiple times, by the same user, leads to loss of funds

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