CVE-2018-18713 : Security Advisory and Response

PHPYun 4.6 allows remote attackers to access arbitrary files through directory traversal in the down_sql_action() function.

Understanding CVE-2018-18713

This CVE involves a vulnerability in PHPYun 4.6 that enables remote attackers to read arbitrary files via directory traversal.

What is CVE-2018-18713?

The down_sql_action() function in PHPYun 4.6 permits remote attackers to access arbitrary files by exploiting directory traversal through a specific URI.

The Impact of CVE-2018-18713

Remote attackers can read arbitrary files on the affected system.

Technical Details of CVE-2018-18713

PHPYun 4.6 is vulnerable to a directory traversal attack that allows unauthorized access to files.

Vulnerability Description

The down_sql_action() function in PHPYun 4.6 is susceptible to a directory traversal exploit, enabling attackers to read files they should not have access to.

Affected Systems and Versions

Affected Version: PHPYun 4.6

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the 'name' parameter in the specific URI to traverse directories and access unauthorized files.

Mitigation and Prevention

To address CVE-2018-18713, immediate steps and long-term security practices are essential.

Immediate Steps to Take

Implement input validation to prevent directory traversal attacks.
Apply security patches or updates provided by the vendor.

Long-Term Security Practices

Regularly monitor and audit file access permissions.
Conduct security assessments and penetration testing to identify vulnerabilities.

Patching and Updates

Update PHPYun to a patched version that addresses the directory traversal vulnerability.