CVE-2021-21426 Explained : Impact and Mitigation

Magento-lts versions 19.4.12 and prior, as well as 20.0.8 and prior, are vulnerable due to unsecured deserialization of an object. A critical CVE-2021-3007 was identified in Zend Framework, affecting OpenMage's magento-lts.

Understanding CVE-2021-21426

This CVE addresses a vulnerability related to the deserialization of untrusted data in magento-lts.

What is CVE-2021-21426?

Magento-lts, a long-term support version of Magento CE, contains a flaw that allows attackers to exploit the unsecured deserialization of objects.

The Impact of CVE-2021-21426

With a CVSS base score of 9.8, this critical vulnerability can have high impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-21426

The vulnerability arises from the unsecured deserialization process in magento-lts versions.

Vulnerability Description

CVE-2021-21426 in magento-lts stems from the improper handling of deserialization, paving the way for potential exploits.

Affected Systems and Versions

Users of magento-lts versions 19.4.12 and prior, and 20.0.8 and prior are at risk from this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the unsecured deserialization process to execute malicious code.

Mitigation and Prevention

To safeguard your system from CVE-2021-21426, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Ensure you apply the patches provided by OpenMage in versions 19.4.13 and 20.0.9 to mitigate the vulnerability.

Long-Term Security Practices

Enhance your system's security posture through regular security audits, monitoring, and employee awareness programs.

Patching and Updates

Stay updated with security patches and subscribe to security advisories to protect your system from emerging threats.