CVE-2021-21018 : Security Advisory and Response

Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier), and 2.3.6 (and earlier) are vulnerable to OS command injection via the scheduled operation module. Successful exploitation could lead to arbitrary code execution by an authenticated attacker.

Understanding CVE-2021-21018

This CVE affects Adobe's Magento Commerce, allowing unauthorized data modification that could result in arbitrary code execution.

What is CVE-2021-21018?

Magento versions 2.4.1 and earlier suffer from an OS command injection vulnerability through the scheduled operation module. An attacker with admin console access can execute arbitrary code.

The Impact of CVE-2021-21018

The vulnerability poses a critical threat, with a CVSS base score of 9.1 (Critical) due to high confidentiality, integrity, and availability impact.

Technical Details of CVE-2021-21018

This section covers the specific details of the vulnerability.

Vulnerability Description

The issue stems from improper neutralization of special elements in an OS command (CWE-78), allowing attackers to execute unauthorized commands.

Affected Systems and Versions

Magento Commerce versions 2.4.1, 2.4.0-p1, and 2.3.6 are confirmed to be impacted by this vulnerability.

Exploitation Mechanism

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

Mitigation and Prevention

To secure systems from CVE-2021-21018, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Update Magento Commerce to a non-vulnerable version immediately.
Restrict admin console access to trusted users only.

Long-Term Security Practices

Regularly update Magento and apply security patches.
Implement strong authentication mechanisms to prevent unauthorized access.

Patching and Updates

Adobe has likely released security patches to address this vulnerability. Ensure timely patch application to safeguard your Magento Commerce instance from exploitation.