CVE-2018-20698 : Security Advisory and Response

The floragunn Search Guard plugin for Kibana version 6.x-16 and earlier is susceptible to URL injection for login redirects when the basePath is configured.

Understanding CVE-2018-20698

This CVE involves a security vulnerability in the floragunn Search Guard plugin for Kibana version 6.x-16 and earlier, allowing URL injection for login redirects.

What is CVE-2018-20698?

The vulnerability in the floragunn Search Guard plugin for Kibana version 6.x-16 and earlier enables malicious actors to manipulate URLs for login redirects on the login page.

The Impact of CVE-2018-20698

This vulnerability could be exploited by attackers to redirect users to malicious websites, potentially leading to phishing attacks or unauthorized access to sensitive information.

Technical Details of CVE-2018-20698

The technical aspects of this CVE are as follows:

Vulnerability Description

The flaw in the floragunn Search Guard plugin for Kibana version 6.x-16 and earlier allows for URL injection, specifically for login redirects when the basePath is set.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: 6.x-16 and earlier

Exploitation Mechanism

The vulnerability can be exploited by manipulating URLs during the login process, potentially leading to unauthorized redirects.

Mitigation and Prevention

To address CVE-2018-20698, consider the following mitigation strategies:

Immediate Steps to Take

Disable the plugin if not essential for operations.
Monitor for any unauthorized redirections or unusual login activities.

Long-Term Security Practices

Regularly update the plugin to the latest secure version.
Implement strong access controls and authentication mechanisms.

Patching and Updates

Ensure that the floragunn Search Guard plugin for Kibana is updated to a version that addresses the URL injection vulnerability.