CVE-2018-20929 : Exploit Details and Defense Strategies

An open redirect vulnerability (SEC-392) exists in cPanel versions prior to 70.0.23, specifically through the /unprotected/redirect.html endpoint.

Understanding CVE-2018-20929

This CVE involves an open redirect vulnerability in cPanel versions before 70.0.23.

What is CVE-2018-20929?

cPanel before version 70.0.23 allows an open redirect via the /unprotected/redirect.html endpoint (SEC-392).

The Impact of CVE-2018-20929

This vulnerability could be exploited by attackers to redirect users to malicious websites, potentially leading to phishing attacks or the installation of malware.

Technical Details of CVE-2018-20929

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability allows for an open redirect via the /unprotected/redirect.html endpoint in cPanel versions prior to 70.0.23.

Affected Systems and Versions

Affected Product: cPanel
Affected Versions: Versions before 70.0.23

Exploitation Mechanism

Attackers can craft malicious URLs that exploit the open redirect vulnerability to redirect users to external sites.

Mitigation and Prevention

Protecting systems from CVE-2018-20929 is crucial to maintaining security.

Immediate Steps to Take

Update cPanel to version 70.0.23 or later to mitigate the vulnerability.
Educate users about the risks of clicking on unknown or suspicious links.

Long-Term Security Practices

Regularly monitor and audit URL redirection mechanisms in web applications.
Implement input validation and proper URL handling to prevent open redirect vulnerabilities.

Patching and Updates

Apply patches and updates provided by cPanel to address security issues promptly.