Manipulating PreCT Mint Logic with Direct Base Token Transfer

Lines of code Vulnerability details Impact A bad actor can steal funds from future depositors by sending the base token directly to the Strategy or StrategyController contracts. This exploit is more effective the less shares that have already been distributed, perhaps early into the launch of the...

FUNCTION SETBASEGAS LACKS BOUNDS CHECK AND EVENT EMIT AFFECTS TRANSFER

Lines of code Vulnerability details Impact Executors can, unintentionally, send a huge amount of ETH Proof of Concept The function setBaseGasuint128 gasLiquidityPool.sol should have bounds like MAXBASEGAS. Even worse this function lacks of event emit. As a result, executors can call sendFundsToUs...

Reward and base token decimals difference isn't accounted for in LiquidityFarming

Lines of code Vulnerability details Impact Reward and base token decimals can differ, while this difference isn't accounted for in the reward amount calculations, which will lead to either missing rewards or sending the whole rewards balance to the first eligible user. For example: If reward is...

An owner can rug pull and or lock users' funds

Lines of code Vulnerability details Impact By implementing malicious versions of the interfaces required by the contracts used in the set functions, an owner can rug pull user positions. Even if the owner is benevolent the fact that there is a rug vector available may negatively impact the...

Missing allowlist checks on tokens in CrossAnchorBridge could cause loss of funds

Lines of code Vulnerability details Impact The CrossAnchorBridge contract accepts any ERC20 token and transfers them to the wormhole bridge. There were allowlist checks on the tokens before, but they were commented out in this version for the audit. If a user transfers, for example, non-supported...

Staking tokens can be stolen

Lines of code Vulnerability details Impact The staking contract keeps track of shares of each user. When withdrawing from the staking contract the amount parameter is converted to shares and this value is decreased shares = amount / totalbalance totalshare. This shares calculation rounds down whi...

bEth Rewards May Be Depleted By Flashloans or Whales

Lines of code Vulnerability details Impact Rewards are dispersed to users as a percentage of the user's balance vs total balance of bEth. Rewards are accumulated each time a user calls executedecreasebalance, executeincreasebalance or executeclaimrewards as these functions will in term call...

Simple interest calculation is not exact

Lines of code Vulnerability details Impact The borrow rate uses a simple interest formula to compute the accrued debt, instead of a compounding formula. pub fn computeinterestraw state: &mut State, blockheight: u64, balance: Uint256, aterrasupply: Uint256, borrowrate: Decimal256, targetdepositrat...

Potential lock of rewards in the custody contracts

Lines of code Vulnerability details Impact The swaptostabledenom function in the custody contracts swaps all other native tokens into a specific one. The function creates swap messages for all the other native tokens and adds them as sub-messages, and handles the reply only when the last...

Whitelist check commented out on the Cross Chain Stable tokens

Lines of code Vulnerability details Impact During the code review, It has been observed that the whitelisted token check is commented out. That will cause to user fund lost on the bridge. The related function only should allow white-listed tokens. Proof of Concept 1. Navigate to the the following...

The pay() function can still be DOSed

Lines of code Vulnerability details Impact From the prior contest: in the pay function users repay their debt and in line 364: it decreases their debt. lets say a user wants to repay all his debt, he calls the pay function with his full debt. an attacker can see it and frontrun to repay a single...

Underflown variable in borrowGivenDebtETHCollateral function

Lines of code Vulnerability details Impact borrowGivenDebtETHCollateral function does never properly call ETH.transfer due to underflow. If borrowGivenDebtETHCollateral function is not deprecated, it would cause unexpected behaviors for users. Proof of Concept Here are codes which contain a...

Borrowers can get back collateral without repaying loans

Lines of code Vulnerability details Impact A borrower can put up collateral for a loan then immediately withdraw the collateral, effectively stealing the loan amount from the lender. Proof of Concept The previous implementation from the prior contest used this check in TimeswapPair.pay which...

Loss of pending messages (if any) in case removeConnectedChain is called

Lines of code Vulnerability details Impact If there are any unprocessed messages to be executed or processed, while removeConnectedChain is called, then they may be stuck from getting processed on the other end. If these messages have transactions for any token transfer then it will get stuck or...

Schain owner dictate fund usage after kill

Lines of code Vulnerability details Impact After a schain is killed by both the owner and the IMA admin, schain admin can control all the fund using e.g. DepositBoxERC20.getFunds functions. This pose a significant centralization risk after the schain is killed. Proof of Concept function...

Not compatible with Rebasing/Deflationary/Inflationary tokens

Lines of code Vulnerability details Proof of Concept The DepositBoxERC20 contract do not appear to support rebasing/deflationary/inflationary tokens whose balance changes during transfers or over time. The necessary checks include at least verifying the amount of tokens transferred to contracts...

Users Can Lock Funds by Backing Out of an Auction

Lines of code Vulnerability details Impact The createReserveAuction function allows users to create duplicate auctions with the same NFT but different auctionIds. As a result, a user could back out of an active auction by creating and then cancelling a duplicate auction. This leads to locked user...

Private sale spoofing

Lines of code Vulnerability details Impact Similar to spoofing in finance, users can create private sales with correct signatures but then frontrun the buy with a transfer to a different wallet they control. No funds are lost as this the NFT FETH exchange is atomic but it can be bad if third...

Centralisation Risk: Admin Role of TokenManagerEth can Rug Pull All Eth from the Bridge

Lines of code Vulnerability details Impact There is a Centralisation risk of the bridge where the DEFAULTADMINROLE of TokenManagerEth.sol is able to modify the ERC20 token on the SChain to any arbitrary address. This would allow the admin role to change the address to one where they have infinite...

Private sale replay attack

Lines of code Vulnerability details Impact The private sale signature used in buyFromPrivateSaleFor does not prevent replay attacks. If the NFT ends up in the original seller's wallet again within the deadline it can be purchased from them again. POC S sells to B using a private sale. S creates a...