CVE-2021-40865 : What You Need to Know

This CVE-2021-40865 article provides details about an Unsafe Deserialization vulnerability in Apache Storm that allows pre-auth Remote Code Execution (RCE). Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2021-40865

CVE-2021-40865 pertains to an Unsafe Deserialization vulnerability in Apache Storm, enabling pre-auth Remote Code Execution (RCE).

What is CVE-2021-40865?

An Unsafe Deserialization flaw in Apache Storm worker services permits pre-auth RCE.

The Impact of CVE-2021-40865

Severity: High

Technical Details of CVE-2021-40865

The technical insights of the CVE-2021-40865 vulnerability are as follows:

Vulnerability Description

Apache Storm supervisor server's worker services experience an Unsafe Deserialization flaw, leading to pre-auth RCE.

Affected Systems and Versions

Affected Versions: Apache Storm v1.0.0, Apache Storm < v1.2.4, Apache Storm < v2.1.1, Apache Storm < v2.2.1, Apache Storm < v2.3.0

Exploitation Mechanism

Exploitation involves leveraging the Unsafe Deserialization vulnerability in Apache Storm worker services to achieve pre-auth RCE.

Mitigation and Prevention

Protect your systems from CVE-2021-40865 by following these steps:

Immediate Steps to Take

Apache Storm 2.2.x users should update to version 2.2.1 or 2.3.0
Apache Storm 2.1.x users should update to version 2.1.1
Apache Storm 1.x users should update to version 1.2.4

Long-Term Security Practices

Implement strict input validation mechanisms
Conduct regular security audits and code reviews
Train developers on secure coding practices

Patching and Updates

Keep Apache Storm updated with the latest patches to prevent vulnerabilities.