CVE-2023-23933 : Security Advisory and Response

This CVE involves an issue in Anomaly Detection with document and field level rules in numerical feature aggregations.

Understanding CVE-2023-23933

In this section, we will delve into the details of CVE-2023-23933, its impact, technical description, affected systems, exploitation mechanism, and mitigation strategies.

What is CVE-2023-23933?

CVE-2023-23933 pertains to a vulnerability in the OpenSearch Anomaly Detection feature. The issue enables users with the Anomaly Detector role to access aggregated numerical data of fields that are supposed to be restricted.

The Impact of CVE-2023-23933

The impact of this vulnerability is significant, especially for systems relying on Anomaly Detection for anomaly identification. It compromises data confidentiality by allowing unauthorized access to restricted data.

Technical Details of CVE-2023-23933

Let's explore the technical aspects of CVE-2023-23933, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability lies in the flawed application of document and field level restrictions in the Anomaly Detection plugin of OpenSearch. Authenticated users granted read access to indexes with restricted fields can view aggregated numerical data, leading to potential data breaches.

Affected Systems and Versions

The affected system for this CVE is the OpenSearch Anomaly Detection feature. Specifically, versions >= 1.0.0 and < 1.3.8 as well as versions >= 2.0.0 and < 2.6.0 are vulnerable to this issue.

Exploitation Mechanism

To exploit this vulnerability, authenticated users with the Anomaly Detector role need to have prior read access to indexes containing restricted fields. By accessing aggregated numerical data, they can bypass existing restrictions.

Mitigation and Prevention

Understanding how to mitigate and prevent CVE-2023-23933 is crucial for ensuring the security of systems utilizing the OpenSearch Anomaly Detection feature.

Immediate Steps to Take

Immediate steps include updating OpenSearch to patched versions 1.3.8 and 2.6.0 to address the vulnerability. Additionally, monitoring user access and permissions can help identify unauthorized attempts to exploit the issue.

Long-Term Security Practices

Implementing a comprehensive access control policy and regular security audits can enhance long-term security practices. Conducting thorough user training on data privacy and access restrictions is also essential.

Patching and Updates

Regularly applying security patches, staying up-to-date with software versions, and promptly addressing security advisories can prevent exploitation of known vulnerabilities like CVE-2023-23933.