CVE-2017-18428 : Security Advisory and Response

In versions of cPanel prior to 66.0.2, a vulnerability (SEC-290) exists where Apache HTTP Server domlogs temporarily have world-readable permissions during logging.

Understanding CVE-2017-18428

In cPanel versions before 66.0.2, a security issue allows Apache HTTP Server domlogs to be temporarily accessible to all users during processing.

What is CVE-2017-18428?

The vulnerability in cPanel versions prior to 66.0.2 allows temporary world-readable permissions on Apache HTTP Server domlogs during logging.

The Impact of CVE-2017-18428

This vulnerability could potentially expose sensitive information contained in Apache HTTP Server domlogs to unauthorized users.

Technical Details of CVE-2017-18428

Vulnerability Description

In cPanel versions before 66.0.2, Apache HTTP Server domlogs become temporarily world-readable during log processing (SEC-290).

Affected Systems and Versions

Product: cPanel
Vendor: Not applicable
Versions: All versions prior to 66.0.2

Exploitation Mechanism

The vulnerability occurs due to incorrect permission settings during the processing of Apache HTTP Server domlogs in cPanel.

Mitigation and Prevention

Immediate Steps to Take

Update cPanel to version 66.0.2 or later to mitigate the vulnerability.
Regularly monitor and restrict access to Apache HTTP Server domlogs.

Long-Term Security Practices

Implement least privilege access controls to limit exposure of sensitive data.
Conduct regular security audits and assessments to identify and address vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates for cPanel to prevent exploitation of known vulnerabilities.