CVE-2021-33403 : Security Advisory and Response

A detailed overview of CVE-2021-33403 focusing on the integer overflow vulnerability in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allowing the owner to manipulate transactions and lead to financial losses.

Understanding CVE-2021-33403

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-33403.

What is CVE-2021-33403?

CVE-2021-33403 involves an integer overflow vulnerability present in the transfer function of Lancer Token's smart contract, enabling the contract owner to trigger unexpected financial losses in transactions between significant accounts.

The Impact of CVE-2021-33403

The vulnerability poses a severe risk as it allows the owner of the smart contract to manipulate transactions, potentially resulting in substantial financial losses affecting large accounts during transfers.

Technical Details of CVE-2021-33403

Explore the specifics of the vulnerability, including its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The integer overflow vulnerability in the transfer function of Lancer Token's smart contract permits the owner to exploit transactions and impact financial transfers between sizeable accounts.

Affected Systems and Versions

The vulnerability affects all versions of Lancer Token's smart contract implementation, leaving them susceptible to financial manipulation by the contract owner.

Exploitation Mechanism

By leveraging the integer overflow flaw in the transfer function, the smart contract owner can cause unexpected financial losses during transactions involving large accounts.

Mitigation and Prevention

Discover the essential steps to mitigate the risks posed by CVE-2021-33403 and safeguard the affected systems from exploitation.

Immediate Steps to Take

Owners of systems using Lancer Token should consider immediate security measures to protect their assets and prevent financial losses due to unauthorized transactions.

Long-Term Security Practices

Implementing robust security practices, such as code reviews, smart contract audits, and secure coding guidelines, can help prevent similar vulnerabilities and enhance overall system security.

Patching and Updates

Regularly updating the smart contract's codebase, addressing known vulnerabilities promptly, and staying informed about security best practices are crucial for maintaining the integrity of the system.