CVE-2017-16903 : Security Advisory and Response

A vulnerability in LvyeCMS version 3.1 allows remote attackers to upload and execute arbitrary PHP code, posing a significant security risk.

Understanding CVE-2017-16903

LvyeCMS through version 3.1 is susceptible to a remote code execution vulnerability that can be exploited by malicious actors.

What is CVE-2017-16903?

Remote attackers can leverage directory traversal sequences in the 'dir' parameter, combined with PHP code in the 'content' parameter, within a template Style add request to index.php, enabling them to upload and execute PHP code of their choice.

The Impact of CVE-2017-16903

The vulnerability allows unauthorized individuals to execute malicious PHP code on the affected system, potentially leading to data theft, system compromise, and other serious security breaches.

Technical Details of CVE-2017-16903

LvyeCMS version 3.1 is vulnerable to remote code execution due to improper input validation.

Vulnerability Description

Attackers can exploit directory traversal sequences in the 'dir' parameter along with PHP code in the 'content' parameter to execute arbitrary PHP code.

Affected Systems and Versions

Product: LvyeCMS
Version: 3.1

Exploitation Mechanism

Attackers use directory traversal sequences in the 'dir' parameter
PHP code is inserted in the 'content' parameter

Mitigation and Prevention

It is crucial to take immediate action to mitigate the risks associated with CVE-2017-16903.

Immediate Steps to Take

Disable the affected functionality if possible
Implement input validation to prevent directory traversal attacks
Monitor and analyze web server logs for suspicious activities

Long-Term Security Practices

Regularly update and patch LvyeCMS to the latest secure version
Conduct security audits and penetration testing to identify vulnerabilities

Patching and Updates

Apply security patches provided by LvyeCMS promptly to address the vulnerability