Example of a Reentrancy Attack
The standard reentrancy attack is where an attacker repeatedly calls a function in a contract, causing an infinite loop and potentially stealing funds. A user interacts with the Vulnerable Smart Contract to deposit funds.
- The Malicious Contract then repeatedly calls the deposit function of the Vulnerable Smart Contract, depositing funds into the attacker’s own account.
- The Malicious Contract then calls the withdraw function of the Vulnerable Smart Contract, withdrawing the deposited funds.
- Because the deposit function of the Vulnerable Smart Contract is not properly protected against reentrancy, the attacker is able to repeatedly call the deposit function before calling the withdraw function, effectively stealing funds from the contract.
Reentrancy Attack in Smart Contracts
Reentrancy attack in solidity repeatedly withdraws funds from the smart contract and transfers them. The article focuses on discussing Reentrancy Attacks in Smart Contracts. It occurs when a function makes an external call to another untrusted contract. The article focuses on discussing reentrancy attacks in smart contracts.
The following topics will be discussed here:
- What is a Reentrancy Attack?
- Example of Reentrancy Attack
- How Does Reentrancy Attack Work?
- Types of Reentrancy Attack
- Reentrancy Smart Contract Attack Examples
- Is the Reentrancy Attack Still a Significant Problem?
- How to Protect Smart Contracts Against a Reentrancy Attack?
Let’s start discussing each of these topics in detail.