CVE-2021-20327 : Vulnerability Insights and Analysis
Learn about CVE-2021-20327 impacting the Node.js mongodb-client-encryption module. Discover the vulnerability details, impact, and mitigation steps for enhanced security.
A vulnerability in a specific version of the Node.js mongodb-client-encryption module could allow interception of traffic between the Node.js driver and the KMS service, rendering client-side field level encryption ineffective.
Understanding CVE-2021-20327
This vulnerability affects the mongodb-client-encryption module version 1.2.0 and was discovered during internal testing.
What is CVE-2021-20327?
The Node.js mongodb-client-encryption module fails to validate the KMS server's certificate properly, making it susceptible to interception attacks.
The Impact of CVE-2021-20327
With a successful active MITM attack, an attacker could intercept traffic between the Node.js driver and the KMS service, which compromises client-side field level encryption.
Technical Details of CVE-2021-20327
This vulnerability has a CVSS base score of 6.4, with high confidentiality and integrity impacts. It requires user interaction and is of medium severity.
Vulnerability Description
The issue lies in the inadequate validation of the KMS server's certificate by the mongodb-client-encryption module.
Affected Systems and Versions
- Product: mongodb-client-encryption module
- Vendor: MongoDB Inc.
- Version: 1.2.0
Exploitation Mechanism
An attacker positioned in a privileged network location could perform a Man-in-The-Middle (MITM) attack to intercept traffic between the Node.js driver and the KMS service.
Mitigation and Prevention
To address CVE-2021-20327, immediate actions should be taken along with long-term security measures and timely patching.
Immediate Steps to Take
- Upgrade to a secure version that contains a fix for the vulnerability.
- Ensure proper validation of certificates in the mongodb-client-encryption module.
Long-Term Security Practices
Establish secure communication channels and monitor for any unauthorized traffic interception attempts.
Patching and Updates
Regularly update the mongodb-client-encryption module to the latest secure versions released by MongoDB Inc.