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

Missing Price Staleness Check in `LendingPool::getNFTPrice`

0xdarko

Summary

LendingPool::getNFTPrice retrieves NFT prices without validating how old the price data is, potentially allowing the use of stale prices in lending decisions.

Vulnerability Details

[](https://github.com/Cyfrin/2025-02-raac/blob/89ccb062e2b175374d40d824263a4c0b601bcb7f/contracts/core/pools/LendingPool/LendingPool.sol#L591-L595)

The LendingPool::getNFTPrice function retrieves prices without checking their age:

function getNFTPrice(uint256 tokenId) public view returns (uint256) {
(uint256 price, uint256 lastUpdateTimestamp) = priceOracle.getLatestPrice(tokenId);
if (price == 0) revert InvalidNFTPrice();
// Missing staleness check
return price;
}

While the function retrieves the lastUpdateTimestamp, it doesn't use it to validate the freshness of the price data.

Impact

  • Stale prices could be used in lending calculations

  • Could lead to incorrect loan-to-value ratios

  • Financial impact through miss-priced loans

Tools Used

  • Manual code review

  • Control flow analysis

Recommendations

Add a staleness check with a configured threshold and create a new error:

+ error StalePrice();
​
+ uint256 public constant PRICE_STALENESS_THRESHOLD = 24 hours; // or whatever time you want
​
function getNFTPrice(uint256 tokenId) public view returns (uint256) {
(uint256 price, uint256 lastUpdateTimestamp) = priceOracle.getLatestPrice(tokenId);
if (price == 0) revert InvalidNFTPrice();
+ if (lastUpdateTimestamp == 0 || block.timestamp >= lastUpdateTimestamp + PRICE_STALENESS_THRESHOLD)
+ revert StalePrice();
return price;
}

Note: added lastUpdateTimestamp == 0 is extra incase it should revert if that value is 0

Updates

Lead Judging Commences

inallhonesty Lead Judge about 2 months ago
Submission Judgement Published
Validated
Assigned finding tags:

LendingPool::getNFTPrice or getPrimeRate doesn't validate timestamp staleness despite claiming to, allowing users to exploit outdated collateral values during price drops

inallhonesty Lead Judge about 2 months ago
Submission Judgement Published
Validated
Assigned finding tags:

LendingPool::getNFTPrice or getPrimeRate doesn't validate timestamp staleness despite claiming to, allowing users to exploit outdated collateral values during price drops

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