CVE-2021-21015 : What You Need to Know

Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are vulnerable to an OS command injection via the customer attribute save controller, potentially leading to arbitrary code execution by an authenticated attacker.

Understanding CVE-2021-21015

This CVE highlights a critical vulnerability in Magento Commerce that could allow an attacker to execute arbitrary code through unauthorized data modification.

What is CVE-2021-21015?

Magento Commerce versions 2.4.1, 2.4.0-p1, and 2.3.6 are susceptible to an OS command injection flaw in the customer attribute save controller. This vulnerability requires access to the admin console for successful exploitation.

The Impact of CVE-2021-21015

The impact of this CVE is rated as Critical, with a CVSS base score of 9.1. It poses a high risk as it could allow an authenticated attacker to execute arbitrary code, potentially compromising confidentiality, integrity, and availability.

Technical Details of CVE-2021-21015

This section provides more insights into the vulnerability.

Vulnerability Description

The vulnerability arises from improper neutralization of special elements used in an OS command (OS command injection - CWE-78), enabling attackers to execute unauthorized code.

Affected Systems and Versions

Magento Commerce versions 2.4.1, 2.4.0-p1, and 2.3.6 are confirmed to be impacted. Custom versions are also affected.

Exploitation Mechanism

Successful exploitation of this vulnerability requires an authenticated attacker to have access to the admin console.

Mitigation and Prevention

Protecting systems from CVE-2021-21015 is crucial for ensuring security.

Immediate Steps to Take

Update Magento Commerce to a secure version that patches this vulnerability.
Restrict access to the admin console to authorized personnel only.
Monitor for any unauthorized or suspicious activities.

Long-Term Security Practices

Regularly update and patch Magento Commerce to the latest secure versions.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by Adobe to mitigate the CVE-2021-21015 threat.