Part 2
Zaros
PerpetualsDEXFoundrySolidity
70,000 USDC
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Submission Details
Severity: medium
Invalid

Timestamp Manipulation in checkLog

bareli

Summary

  1. Timestamp Manipulation checkLog() uses block.timestamp for deadline checks and Miners can manipulate timestamps within certain bounds

Vulnerability Details

​
​
function checkLog(
AutomationLog calldata log,
bytes memory
)
external
view
returns (bool upkeepNeeded, bytes memory performData)
{
// <https://docs.chain.link/chainlink-automation/guides/log-trigger>
// 0th index is the event signature hash
address caller = bytes32ToAddress(log.topics\[1]);
uint128 requestId = uint128(uint256(log.topics\[2]));
​
​
// load usd token swap storage
UsdTokenSwapKeeperStorage storage self = _getUsdTokenSwapKeeperStorage();
​
// load requiest for user by id
UsdTokenSwapConfig.SwapRequest memory request =
IMarketMakingEngine(self.marketMakingEngine).getSwapRequest(caller, requestId);
​
// if request dealine expired revert
@> if (request.deadline < block.timestamp) {
return (false, new bytes(0));
}
​
// if keeper asset stream != vault asset revert
// Since the event emitted would be catched by multiple keepers, each with a stream for different asset, only
// the one with the matching asset needs to be able to execute the swap
if (request.assetOut != self.asset) {
return (false, new bytes(0));
}
​
string[] memory streams = new string[](1);
streams[0] = self.streamId;
​
// encode perform data
bytes memory extraData = abi.encode(caller, requestId);
​
revert StreamsLookup(DATA_STREAMS_FEED_LABEL, streams, DATA_STREAMS_QUERY_LABEL, block.timestamp, extraData);
}

Impact

Miners can manipulate timestamps within certain bounds

Tools Used

Recommendations

Updates

Lead Judging Commences

inallhonesty Lead Judge 10 months ago
Submission Judgement Published
Invalidated
Reason: Non-acceptable severity

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