CVE-2021-23470 : What You Need to Know

A detailed overview of CVE-2021-23470, also known as Prototype Pollution, affecting the putil-merge package before version 3.8.0.

Understanding CVE-2021-23470

This CVE highlights a vulnerability in the putil-merge package that allows an attacker to supply a malicious value through the merge() function due to inadequate input validation.

What is CVE-2021-23470?

CVE-2021-23470, also known as Prototype Pollution, affects the putil-merge package versions prior to 3.8.0. Attackers can exploit this vulnerability by manipulating the values passed into the merge() function.

The Impact of CVE-2021-23470

The impact of this CVE is rated as high, with a CVSS base score of 8.2, making it a severe threat. The availability impact is high, while confidentiality impact is none.

Technical Details of CVE-2021-23470

This section delves into the technical aspects of CVE-2021-23470.

Vulnerability Description

The vulnerability arises from the merge() function's failure to validate values passed as arguments, allowing attackers to insert malicious values, potentially leading to code injection and other security threats.

Affected Systems and Versions

The putil-merge package versions before 3.8.0 are susceptible to this vulnerability, exposing systems running these versions to potential exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the merge() function's lack of input validation to introduce harmful values, ultimately compromising the application's security.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-23470.

Immediate Steps to Take

Developers and users should update the putil-merge package to version 3.8.0 or above to mitigate the risk of exploitation. Implement input validation measures to prevent malicious inputs.

Long-Term Security Practices

Establish robust coding practices, conduct regular security audits, and stay informed about potential vulnerabilities in third-party packages to enhance long-term security.

Patching and Updates

Stay updated with security advisories, apply patches promptly, and monitor for any new developments related to CVE-2021-23470 to ensure comprehensive protection.