CVE-2017-18399 : Exploit Details and Defense Strategies

With versions of cPanel before 68.0.15, an exploiter has the ability to access the crontab file of the root user for a brief period of time after enabling or disabling sqloptimizer (SEC-332).

Understanding CVE-2017-18399

cPanel before 68.0.15 allows attackers to read root's crontab file during a short time interval upon enabling or disabling sqloptimizer (SEC-332).

What is CVE-2017-18399?

CVE-2017-18399 is a vulnerability in cPanel versions prior to 68.0.15 that enables attackers to access the crontab file of the root user.

The Impact of CVE-2017-18399

This vulnerability allows unauthorized access to critical system files, potentially leading to further exploitation and compromise of the system.

Technical Details of CVE-2017-18399

Vulnerability Description

Exploiter can read the crontab file of the root user during a short time interval after enabling or disabling sqloptimizer (SEC-332).

Affected Systems and Versions

Product: cPanel
Vendor: cPanel
Versions Affected: Before 68.0.15

Exploitation Mechanism

The vulnerability occurs when an attacker takes advantage of the brief window of opportunity after enabling or disabling sqloptimizer to access the root user's crontab file.

Mitigation and Prevention

Immediate Steps to Take

Upgrade cPanel to version 68.0.15 or newer to patch the vulnerability.
Monitor crontab file changes for any unauthorized modifications.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement strong access controls and permissions to limit unauthorized access to critical files.

Patching and Updates

Ensure timely installation of security patches and updates to mitigate the risk of exploitation.