Liquidity Management
Gamma
DeFiFoundry
50,000 USDC
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Submission Details
Severity: low
Invalid

Keeper Actions can be DOS by directly sending PerpetualVault 1 USD

izuman

Summary

When the keeper calls PerpetualVault::runNextAction they check if the index token balance is greater than 1 USD and if it is they will perform a DEX swap.

IERC20(indexToken).balanceOf(address(this)) * prices.indexTokenPrice.min >= ONE_USD
) {
(, bytes memory data) = abi.decode(metadata[1], (PROTOCOL, bytes));
_doDexSwap(data, false);
}

If the metadata was not passed for a DEX swap then the call will revert.

Therefore, an attacker can send 1 USD of the Index token to the contract and the keeper's transaction will revert since it did not expect to perform a DEX swap and did not pass the correct metadata if any.

Vulnerability Details

Here is a list of the vulnerable code:
https://github.com/CodeHawks-Contests/2025-02-gamma/blob/84b9da452fc84762378481fa39b4087b10bab5e0/contracts/PerpetualVault.sol#L363
https://github.com/CodeHawks-Contests/2025-02-gamma/blob/84b9da452fc84762378481fa39b4087b10bab5e0/contracts/PerpetualVault.sol#L375
https://github.com/CodeHawks-Contests/2025-02-gamma/blob/84b9da452fc84762378481fa39b4087b10bab5e0/contracts/PerpetualVault.sol#L392

Impact

Keeper actions when calling PerpetualVault::runNextAction can be DOSed

Tools Used

Manual review and Foundry

Recommendations

  1. Increase the min size to maybe $10 USD to discourage and attacker

Updates

Lead Judging Commences

n0kto Lead Judge 9 months ago
Submission Judgement Published
Invalidated
Reason: Non-acceptable severity
Assigned finding tags:

Informational or Gas

Please read the CodeHawks documentation to know which submissions are valid. If you disagree, provide a coded PoC and explain the real likelihood and the detailed impact on the mainnet without any supposition (if, it could, etc) to prove your point.

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