CVE-2018-20939 : Exploit Details and Defense Strategies

Prior to version 68.0.27, cPanel allows users to identify the contents of directories not belonging to them by utilizing backups (SEC-339).

Understanding CVE-2018-20939

cPanel before version 68.0.27 has a vulnerability that enables a user to discover directory contents not owned by them through backups.

What is CVE-2018-20939?

cPanel version 68.0.27 and earlier have a security issue that allows unauthorized users to access directory contents via backups.

The Impact of CVE-2018-20939

This vulnerability could lead to unauthorized access to sensitive information stored in directories not owned by the user, potentially compromising data confidentiality.

Technical Details of CVE-2018-20939

Vulnerability Description

The vulnerability in cPanel before version 68.0.27 allows users to view directory contents not owned by them using backups.

Affected Systems and Versions

Product: cPanel
Vendor: cPanel
Versions affected: Prior to 68.0.27

Exploitation Mechanism

Unauthorized users can exploit this vulnerability by leveraging backups to access directory contents not belonging to them.

Mitigation and Prevention

Immediate Steps to Take

Upgrade cPanel to version 68.0.27 or later to mitigate this vulnerability.
Regularly review and restrict access permissions to sensitive directories.

Long-Term Security Practices

Implement a least privilege access policy to limit user access to only necessary directories.
Conduct regular security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates provided by cPanel to address known vulnerabilities.