CVE-2019-20933 : Security Advisory and Response

An authentication bypass vulnerability exists in InfluxDB versions prior to 1.7.6, affecting the authenticate function in services/httpd/handler.go due to a JWT token containing an empty SharedSecret.

Understanding CVE-2019-20933

This CVE involves a critical security issue in InfluxDB versions before 1.7.6 that allows an authentication bypass through the authenticate function.

What is CVE-2019-20933?

The vulnerability in CVE-2019-20933 is an authentication bypass flaw in InfluxDB versions earlier than 1.7.6, specifically impacting the authenticate function in services/httpd/handler.go. The issue arises from the potential presence of a JWT token with an empty SharedSecret.

The Impact of CVE-2019-20933

This vulnerability could be exploited by malicious actors to bypass authentication mechanisms in affected InfluxDB versions, potentially leading to unauthorized access to sensitive data and system compromise.

Technical Details of CVE-2019-20933

In-depth technical information about the vulnerability.

Vulnerability Description

The vulnerability in InfluxDB before version 1.7.6 allows for an authentication bypass due to the presence of an empty SharedSecret in a JWT token, specifically affecting the authenticate function in services/httpd/handler.go.

Affected Systems and Versions

InfluxDB versions prior to 1.7.6

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a JWT token with an empty SharedSecret, enabling them to bypass authentication controls.

Mitigation and Prevention

Measures to address and prevent the CVE-2019-20933 vulnerability.

Immediate Steps to Take

Upgrade to InfluxDB version 1.7.6 or later to mitigate the authentication bypass vulnerability.
Monitor for any unauthorized access or unusual activities on the system.

Long-Term Security Practices

Implement strong authentication mechanisms and regularly review and update security configurations.
Conduct security assessments and penetration testing to identify and address potential vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by InfluxDB.
Apply patches promptly to ensure the system is protected against known vulnerabilities.