CVE-2019-3826 Explained : Impact and Mitigation

Prometheus versions prior to 2.7.1 had a vulnerability related to cross-site scripting (XSS) that could allow unauthorized script execution and storage.

Understanding CVE-2019-3826

This CVE involves a stored, DOM-based cross-site scripting (XSS) flaw in Prometheus before version 2.7.1.

What is CVE-2019-3826?

The vulnerability in Prometheus versions prior to 2.7.1 allowed for the execution and storage of unauthorized scripts by tricking authenticated users into accessing a crafted URL.

The Impact of CVE-2019-3826

CVSS Score: 6.1 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
User Interaction: Required
Scope: Changed
Confidentiality and Integrity Impact: Low
Privileges Required: None
Availability Impact: None

Technical Details of CVE-2019-3826

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

The flaw originated from a stored, DOM-based approach, enabling the running and long-term storage of unauthorized scripts.

Affected Systems and Versions

Affected Product: Prometheus
Affected Version: 2.7.1

Exploitation Mechanism

Exploitation involved convincing authenticated users to access a specifically created URL on a Prometheus server.

Mitigation and Prevention

Protect your systems from CVE-2019-3826 with these mitigation strategies.

Immediate Steps to Take

Update Prometheus to version 2.7.1 or later to mitigate the vulnerability.
Educate users about the risks of clicking on unknown or suspicious URLs.

Long-Term Security Practices

Regularly monitor and update your systems to address security vulnerabilities promptly.

Patching and Updates

Stay informed about security advisories and promptly apply patches to secure your systems.