CVE-2017-7321 Explained : Impact and Mitigation

MODX Revolution prior to version 2.5.4-pl is vulnerable to remote code execution through a specific parameter in a URL.

Understanding CVE-2017-7321

This CVE involves a vulnerability in MODX Revolution that allows attackers to execute PHP code remotely.

What is CVE-2017-7321?

The setup/controllers/welcome.php file in versions of MODX Revolution prior to 2.5.4-pl enables attackers to execute PHP code of their choice remotely by exploiting the config_key parameter in the setup/index.php?action=welcome URL.

The Impact of CVE-2017-7321

This vulnerability can lead to unauthorized remote code execution, potentially compromising the security and integrity of the affected systems.

Technical Details of CVE-2017-7321

MODX Revolution 2.5.4-pl and earlier versions are susceptible to this vulnerability.

Vulnerability Description

The setup/controllers/welcome.php in MODX Revolution 2.5.4-pl and earlier allows remote attackers to execute arbitrary PHP code via the config_key parameter to the setup/index.php?action=welcome URI.

Affected Systems and Versions

Product: MODX Revolution
Versions: Prior to 2.5.4-pl

Exploitation Mechanism

Attackers exploit the config_key parameter in the setup/index.php?action=welcome URL to execute PHP code remotely.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Upgrade to version 2.5.4-pl or later of MODX Revolution to mitigate the vulnerability.
Monitor and restrict access to the setup/controllers/welcome.php file.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement strong access controls and input validation to mitigate similar risks.

Patching and Updates

Apply security patches and updates provided by MODX Revolution to address this vulnerability.