L1 TO L2 ERC20 TOKEN TRANSFER CAN BE DoS IN THE FxERC20ChildTunnel CONTRACT SINCE A MALICIOUS USER CAN SET THE fxRootTunnel ADDRESS TO AN INVALID ADDRESS

Lines of code Vulnerability details Impact The FxERC20ChildTunnel is a smart contract which is used for the L2 token management. The FxERC20ChildTunnel contract inherits from the FxBaseChildTunnel contract. The FxBaseChildTunnel contract has the validateSender modifier which requires the sender o...

claimOwnerIncentives x depositServiceDonationsETH x checkpoint x-entrancy Attack to get instant topups

Lines of code Vulnerability details Impact Double Topup via claimOwnerIncentives- depositServiceDonationsETH - checkpoint - claimOwnerIncentives loop Proof of Concept - Deploys Attacking Smart Contract - Executes 1st transaction via Attacking Contract to trigger depositServiceDonationsETH - Execu...

Beware: Scam-as-a-Service Aiding Cybercriminals in Crypto Wallet-Draining Attacks

Cybersecurity researchers are warning about an increase in phishing attacks that are capable of draining cryptocurrency wallets. "These threats are unique in their approach, targeting a wide range of blockchain networks, from Ethereum and Binance Smart Chain to Polygon, Avalanche, and almost 20...

addRewardToken() does note remove old entries before adding new ones

Lines of code 455, 280, 378, 411 Vulnerability details Each time addRewardToken is called, new entries are added to the array, but doing so does not remove any old entries. By calling the function multiple times, an attacker can can increase their voting power indefinitely, without having to...

CVE-2023-46247

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine EVM. Contracts containing large arrays might underallocate the number of slots they need by 1. Prior to v0.3.8, the calculation to determine how many slots a storage variable needed used math.ceiltype.sizeinbytes / 32. T...

Design/Logic Flaw

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine EVM. Contracts containing large arrays might underallocate the number of slots they need by 1. Prior to v0.3.8, the calculation to determine how many slots a storage variable needed used math.ceiltype.sizeinbytes / 32. T...

CVE-2023-46247

CVE-2023-46247 concerns Vyper (EVM) where contracts with large arrays could underallocate storage slots by 1 due to a rounding error in the calculation of required slots. Prior to v0.3.8, storage size was computed as ceil(type_.size_in_bytes / 32); when type_.size_in_bytes is large (>2**46) or...

CVE-2023-46247 Vyper has incorrect storage layout for contracts containing large arrays

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine EVM. Contracts containing large arrays might underallocate the number of slots they need by 1. Prior to v0.3.8, the calculation to determine how many slots a storage variable needed used math.ceiltype.sizeinbytes / 32. T...

CVE-2023-46247 Vyper has incorrect storage layout for contracts containing large arrays

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine EVM. Contracts containing large arrays might underallocate the number of slots they need by 1. Prior to v0.3.8, the calculation to determine how many slots a storage variable needed used math.ceiltype.sizeinbytes / 32. T...

CVE-2023-46247

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine EVM. Contracts containing large arrays might underallocate the number of slots they need by 1. Prior to v0.3.8, the calculation to determine how many slots a storage variable needed used math.ceiltype.sizeinbytes / 32. T...

Use of transferFrom() rather than safeTransferFrom() for NFTs in will lead to the loss of NFTs

Lines of code 230, 342, 514, 536 Vulnerability details The EIP-721 standard says the following about transferFrom: /// @notice Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE /// TO CONFIRM THAT to IS CAPABLE OF RECEIVING NFTS OR ELSE /// THEY MAY BE PERMANENTLY LOST /// @dev Throws...

Design/Logic Flaw

OpenZeppelin Contracts is a library for smart contract development. A merge issue when porting the 5.0.1 patch to the 4.9 branch caused a line duplication. In the version of Multicall.sol released in @openzeppelin/email protected and @openzeppelin/email protected, all subcalls are executed twice...

CVE-2023-49798 Duplicated execution of subcalls in OpenZeppelin Contracts

OpenZeppelin Contracts is a library for smart contract development. A merge issue when porting the 5.0.1 patch to the 4.9 branch caused a line duplication. In the version of Multicall.sol released in @openzeppelin/[email protected] and @openzeppelin/[email protected], all subcalls are...

CVE-2023-49798

OpenZeppelin Contracts’ CVE-2023-49798 relates to a merge-conflict error in the Multicall.sol implementation that caused all subcalls to be executed twice in versions @openzeppelin/[email protected] and @openzeppelin/[email protected]. This duplication could lead to unintended duplicate o...

CVE-2023-49798

OpenZeppelin Contracts is a library for smart contract development. A merge issue when porting the 5.0.1 patch to the 4.9 branch caused a line duplication. In the version of Multicall.sol released in @openzeppelin/[email protected] and @openzeppelin/[email protected], all subcalls are...

CVE-2023-49798 Duplicated execution of subcalls in OpenZeppelin Contracts

OpenZeppelin Contracts is a library for smart contract development. A merge issue when porting the 5.0.1 patch to the 4.9 branch caused a line duplication. In the version of Multicall.sol released in @openzeppelin/[email protected] and @openzeppelin/[email protected], all subcalls are...

Unrestricted Unwrap Fee Changes: Instability, Market Disruption, and Loss of Trust

Lines of code Vulnerability details Impact The current changeUnwrapFee function in the Ocean smart contract allows the owner to change the unwrap fee divisor with no restrictions, leading to several negative impacts: 1. Unstable Unwrap Fees: Frequent changes in the divisor can cause instability a...

Unwrapping function emits event with incorrect values.

Lines of code Vulnerability details Impact The etherUnwrap function in the smart contract does not correctly emit the EtherUnwrap event. The issue arises when calculating and emitting the fee and transfer amounts. The current implementation deducts the fee, transfers the calculated amount, and...

An attacker can mint more than they are allowed due to MinterContract.sol#mint() reentrancy vulnerability

Lines of code Vulnerability details Bug Description mintProcessing in NextGenCore.sol calls OpenZeppelin’s safeMint from their ERC721 contract to mint a token. safeMint checks if the target address is a contract by calling checkOnERC721Received to ensure it supports receiving NFTs. If the target...

Insecure and Inflexible Forwarder Approval Mechanism (Full Access Grant)

Lines of code Vulnerability details Impact The current implementation of the onlyApprovedForwarder modifier in the Ocean smart contract has several negative impacts: 1. Security Risk: Users are exposed to a significant security risk if their forwarder is compromised. An attacker can exploit full...