CVE-2021-38296 Explained : Impact and Mitigation

Apache Spark Key Negotiation Vulnerability is a security issue that affects Apache Spark versions up to and including 3.1.2. The vulnerability allows for full encryption key recovery, potentially leading to decryption of plaintext traffic offline. It is assigned the CWE-294 for Authentication Bypass by Capture-replay. Update to Apache Spark 3.1.3 or later to mitigate this vulnerability.

Understanding CVE-2021-38296

This section provides insight into the Apache Spark Key Negotiation Vulnerability.

What is CVE-2021-38296?

CVE-2021-38296, also known as the Apache Spark Key Negotiation Vulnerability, allows attackers to recover encryption keys and decrypt plaintext traffic offline in Apache Spark versions up to and including 3.1.2.

The Impact of CVE-2021-38296

The impact of this vulnerability is rated as moderate. Attackers could potentially exploit the vulnerability to gain unauthorized access to sensitive information.

Technical Details of CVE-2021-38296

Here are the technical details of the Apache Spark Key Negotiation Vulnerability.

Vulnerability Description

Apache Spark supports end-to-end encryption of RPC connections but uses a mutual authentication protocol that allows for encryption key recovery in versions up to 3.1.2.

Affected Systems and Versions

Apache Spark versions up to and including 3.1.2 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability allows attackers to perform an initial interactive attack to recover encryption keys and subsequently decrypt plaintext traffic offline.

Mitigation and Prevention

Learn how to mitigate and prevent the Apache Spark Key Negotiation Vulnerability.

Immediate Steps to Take

Update Apache Spark to version 3.1.3 or later to prevent exploitation of this vulnerability.

Long-Term Security Practices

Implement strong encryption practices and regularly update your Apache Spark installation to stay protected against security threats.

Patching and Updates

Stay informed about security updates released by Apache Software Foundation and promptly apply patches to secure your Apache Spark deployment.