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CVE-2021-21014: Critical Vulnerability in Magento

A critical vulnerability in Magento versions 2.4.1 and earlier allows authenticated attackers to bypass file upload restrictions, potentially leading to arbitrary code execution. Immediate patching is essential.

CRITICALPublic ExploitCVSS 9.1 · Published February 11, 2021

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Magento 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. This vulnerability allows authenticated attackers to execute arbitrary code, posing a significant threat to the integrity of affected systems. The critical nature of this vulnerability, with a CVSS score of 9.1, underscores the urgency for organizations to prioritize remediation.

Access to the admin console is required for successful exploitation, making it crucial for organizations to monitor and restrict access to this interface. Failure to address this vulnerability can lead to severe security breaches, including unauthorized access to sensitive data and system integrity compromise.

Organizations should prioritize patching immediately. The risk to organizations includes potential data loss, reputational damage, and compliance violations. Given the prevalence of Magento in e-commerce environments, this vulnerability may be particularly appealing to attackers.

As of now, public proof of concept code has been found on GitHub, indicating the potential for rapid exploitation. Organizations must remain vigilant and implement necessary security measures to mitigate the risks associated with this vulnerability.

Vulnerability Details

This vulnerability allows for a file upload restriction bypass, which could lead to arbitrary code execution by an authenticated attacker. The critical CVSS score of 9.1 categorizes this vulnerability as one that warrants immediate attention. The affected products include various versions of Magento, specifically versions 2.4.1, 2.4.0-p1, and 2.3.6 and earlier.

The vulnerability was published on February 11, 2021, and falls under the CWE classification of CWE-434. The attack vector is classified as NETWORK, with a low attack complexity, which means that attackers can exploit this vulnerability without significant technical skill.

Technical Analysis

The root cause of this vulnerability lies in inadequate restrictions on file uploads, allowing attackers with administrative access to upload malicious files. The attack vector is network-based, meaning that exploitation can occur remotely. The attack complexity is low, and high privileges are required for successful exploitation, resulting in significant impacts on confidentiality, integrity, and availability.

Risk & Impact Analysis

The real-world risk associated with this vulnerability is substantial. Successful exploitation can lead to full control over the affected Magento instance, resulting in data theft, website defacement, and potential compromise of customers' personal information. Organizations using affected Magento versions should assess their exposure and implement immediate remediation strategies.

Given the critical severity of this vulnerability, organizations should address it in their priority patch cycle. The potential for exploitation, especially with public proof of concept code available, raises the urgency for immediate action.

Signal

Status

Known Exploit

Yes

Public PoC

Yes

Actively Exploited

No

Ransomware Use

No

Affected Versions

All versions of Magento prior to the vendor patch, specifically 2.4.1, 2.4.0-p1, and 2.3.6 and earlier, are affected by this vulnerability. Organizations should verify their current versions and apply available updates.

Mitigation & Remediation

Organizations should implement the following measures to mitigate the risk associated with this vulnerability: apply patches and updates provided by Magento, restrict access to the admin console, and conduct regular security audits. For an effective remediation strategy, organizations may consider engaging in penetration testing to identify similar weaknesses.

Detection Guidance

To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual file uploads, analyze user access patterns to the admin console, and review any unauthorized changes to the application environment.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability lies in its potential to disrupt e-commerce operations significantly. It highlights the necessity for robust security practices in software development and deployment. Security teams should closely monitor updates from vendors and adapt their security posture accordingly. Organizations are encouraged to implement comprehensive security measures, including regular vulnerability management programs to safeguard their assets.

As part of a proactive security strategy, organizations should also consider engaging in penetration testing methodology to evaluate their defenses against emerging threats.

Organizations can also benefit from understanding the trends in security testing to ensure they are prepared for current and future vulnerabilities.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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