CVE-2017-18413 : Security Advisory and Response

In versions prior to cPanel 67.9999.103, a vulnerability (SEC-299) existed where the backup system could overwrite the home directory for the root user if a mount was missing.

Understanding CVE-2017-18413

This CVE details a security issue in cPanel versions before 67.9999.103 that could lead to the root user's home directory being overwritten.

What is CVE-2017-18413?

The vulnerability in cPanel versions before 67.9999.103 allowed the backup system to overwrite the root user's home directory in the event of a missing mount.

The Impact of CVE-2017-18413

The vulnerability posed a risk of data loss and potential unauthorized access to sensitive information stored in the root user's home directory.

Technical Details of CVE-2017-18413

This section provides more technical insights into the CVE.

Vulnerability Description

The issue in cPanel versions before 67.9999.103 allowed the backup system to overwrite the root user's home directory when a mount disappeared (SEC-299).

Affected Systems and Versions

Affected Systems: cPanel versions before 67.9999.103
Affected Versions: All versions prior to cPanel 67.9999.103

Exploitation Mechanism

The vulnerability could be exploited by triggering a situation where a mount would disappear, leading to the backup system overwriting the root user's home directory.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent such vulnerabilities.

Immediate Steps to Take

Update cPanel to version 67.9999.103 or later to mitigate the vulnerability.
Regularly monitor and verify the integrity of the root user's home directory.

Long-Term Security Practices

Implement regular backups of critical data to prevent permanent loss.
Conduct security audits to identify and address any potential vulnerabilities in the system.

Patching and Updates

Apply patches and updates provided by cPanel to ensure the security of the system and prevent similar vulnerabilities in the future.