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CVE-2021-21014 : Exploit Details and Defense Strategies

Magento Commerce CVE-2021-21014 allows attackers to upload files and execute arbitrary code. Learn the impact, affected versions, and mitigation steps.

Magento Commerce versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier), and 2.3.6 (and earlier) are vulnerable to a file upload restriction bypass, potentially leading to arbitrary code execution by an authenticated attacker.

Understanding CVE-2021-21014

This CVE involves a security vulnerability in Magento Commerce that allows a malicious attacker to upload files, bypassing restrictions and executing arbitrary code.

What is CVE-2021-21014?

Magento Commerce versions 2.4.1, 2.4.0-p1, and 2.3.6 have a flaw that could be exploited by an authenticated attacker, requiring access to the admin console, to upload files with dangerous types, leading to arbitrary code execution.

The Impact of CVE-2021-21014

The impact of this vulnerability is critical, with a CVSS v3.0 base score of 9.1, indicating high severity. Successful exploitation could result in confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-21014

This section delves into the specifics of the vulnerability, affected systems, and the exploitation method.

Vulnerability Description

The vulnerability allows attackers to bypass file upload restrictions in Magento Commerce, potentially executing arbitrary code by uploading malicious files.

Affected Systems and Versions

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

Exploitation Mechanism

Successful exploitation of CVE-2021-21014 requires an authenticated attacker to upload files with dangerous types via the admin console.

Mitigation and Prevention

To safeguard systems from CVE-2021-21014, immediate steps and long-term security practices are essential.

Immediate Steps to Take

        Update Magento Commerce to the latest patched version immediately.
        Restrict admin console access to authorized personnel only.

Long-Term Security Practices

        Regularly monitor and audit file uploads and admin activities.
        Implement file upload restrictions and validation mechanisms.

Patching and Updates

Stay informed about security updates from Magento and promptly apply patches to address known vulnerabilities.

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