CVE-2019-7619 : Exploit Details and Defense Strategies

Elasticsearch versions 7.0.0-7.3.2 and 6.7.0-6.8.3 contain a vulnerability in the API Key service that allows unauthorized users to determine the existence of a username within the Elasticsearch native realm.

Understanding CVE-2019-7619

A vulnerability has been identified in Elasticsearch versions 7.0.0-7.3.2 and 6.7.0-6.8.3, allowing attackers to exploit the API Key service.

What is CVE-2019-7619?

The CVE-2019-7619 vulnerability in Elasticsearch versions 7.0.0-7.3.2 and 6.7.0-6.8.3 enables unauthenticated attackers to send specific requests to reveal usernames in the Elasticsearch native realm.

The Impact of CVE-2019-7619

The vulnerability poses a risk of information exposure, potentially leaking sensitive data stored within Elasticsearch.

Technical Details of CVE-2019-7619

Elasticsearch's vulnerability exposes the following technical aspects:

Vulnerability Description

The flaw in the API Key service allows unauthorized users to verify the existence of usernames within Elasticsearch without authentication.

Affected Systems and Versions

Product: Elasticsearch
Vendor: Elastic
Versions: 7.0.0, 7.0.1, 7.1.0, 7.1.1, 7.2.0, 7.2.1, 7.3.0, 7.3.1, 7.3.2, 6.7.0, 6.7.1, 6.7.2, 6.8.0, 6.8.1, 6.8.2, 6.8.3

Exploitation Mechanism

Attackers can exploit the vulnerability by sending crafted requests to the API Key service, bypassing authentication to reveal usernames.

Mitigation and Prevention

Protect your systems from CVE-2019-7619 with the following measures:

Immediate Steps to Take

Apply security patches provided by Elastic to fix the vulnerability.
Monitor Elasticsearch logs for any suspicious activities indicating exploitation.

Long-Term Security Practices

Implement strong authentication mechanisms to prevent unauthorized access.
Regularly update and patch Elasticsearch to address security vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Elastic to safeguard your Elasticsearch deployment.