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Submission Details
Severity: high
Valid

Incorrect check of `msg.sender` in the `DeliveryPlace.settleAskTaker` function.

kupiasec

Github link

https://github.com/Cyfrin/2024-08-tadle/blob/04fd8634701697184a3f3a5558b41c109866e5f8/src/core/DeliveryPlace.sol#L335-L433

Summary

The DeliveryPlace.settleAskTaker function incorrectly checks msg.sender to be offerInfo.authority instead of stockInfo.authority.

Vulnerability Details

In the DeliveryPlace.settleAskTaker function, msg.sender transfers settledPointTokenAmount point tokens to capital pool and it adds the point tokens to offerInfo.authority.
If status == MarketPlaceStatus.AskSettling, this function checks msg.sender to be offerInfo.authority instead of stockInfo.authority from L361.

https://github.com/Cyfrin/2024-08-tadle/blob/04fd8634701697184a3f3a5558b41c109866e5f8/src/core/DeliveryPlace.sol#L361

if (status == MarketPlaceStatus.AskSettling) {
L361: if (_msgSender() != offerInfo.authority) {
revert Errors.Unauthorized();
}
}

Impact

stockInfo.authority can't settle his own Ask taker orders.

Tools Used

Manual Review

Recommendations

It is recommended to change the code as following:

https://github.com/Cyfrin/2024-08-tadle/blob/04fd8634701697184a3f3a5558b41c109866e5f8/src/core/DeliveryPlace.sol#L361

- if (_msgSender() != offerInfo.authority) {
+ if (_msgSender() != stockInfo.authority) {
revert Errors.Unauthorized();
}
Updates

Lead Judging Commences

0xnevi Lead Judge 10 months ago
Submission Judgement Published
Validated
Assigned finding tags:

finding-PreMarkets-settleAskTaker-wrong-stock-authority

Valid high severity, when taker offers are created pointing to a `offer`, the relevant `stockInfoMap` offers are created with the owner of the offer aka `authority`, set as the creater of the offer, as seen [here](https://github.com/Cyfrin/2024-08-tadle/blob/04fd8634701697184a3f3a5558b41c109866e5f8/src/core/PreMarkets.sol#L245). Because of the wrong check within settleAskTaker, it will permanently DoS the final settlement functionality for taker offers for the maker that listed the original offer, essentially bricking the whole functionality of the market i.e. maker will always get refunded the original collateral, and takers will never be able to transact the original points put up by the maker. This occurs regardless of market mode.

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