Ethereum: Agreement was hacked – Understanding the question
As a smart contract developer on the Ethereum Blockchain, you are not stranger to the potential risks associated with external contracts, placement and interactions. In this article, we will go into the case of a wrongly hacked contract that obtained tokens from another contract.
Incident: Simplified version
Let’s say our contract work was called “MyContract”. Another smart contract, labeled as “your Agreement”, deployed the contract (also known as an event or function) and then called it. This event led our contract to be called “MyContract” and fulfill the functionality of this contract.
Hack: Marker Extraction
When “your agreement” calls “Mycontract”, it basically pulls out the tokens from “MyContract”. These tokens were then obtained and used by another malicious smart contract (let’s call it “hackerContract”) on another blockchain network. HackerContract would execute the functionality of your “agreement”, which in turn interacts with “MyContract” to pull out more tokens.
who went wrong
So what was wrong with this hack? Here are some key points:
* Lack of correct authentication : It seems that “your unified contract” had no way to verify the identity or permission of the contract. This vulnerability allows the attacker to use this lack of security.
* Incorrect event processing.
* Token Extion without permission : Getting tokens from another contract is a serious violation of the terms and conditions of the use of external libraries or APIs. This can lead to identity theft, unauthorized access, or other malicious activities.
Risk Reducing
To prevent similar hacks in the future:
* Introduce proper authentication mechanisms
: Check the identity of the contracts before interaction with them.
* Use safe event processing practices : Make sure events and functions are properly authenticated and empowered to avoid unexpected consequences.
* Monitor and Audit Smart Agreement interaction : Regularly review transactions and event logs to determine possible security violations.
Understanding who went wrong in this case, we can better form our own secure contracts and reduce the risk of similar hackers. As Ethereum developers, it is important to stay alert and customize these principles in order to ensure the integrity and reliability of our smart contract interaction.
