CVE-2021-43290 : What You Need to Know

An issue was discovered in ThoughtWorks GoCD before 21.3.0 where a compromised GoCD agent can upload a malicious file into a server directory.

Understanding CVE-2021-43290

What is CVE-2021-43290?

The vulnerability allows an attacker who has compromised a GoCD agent to upload a malicious file into a directory of a GoCD server. The attacker can control the filename but not the directory where the file is placed.

The Impact of CVE-2021-43290

This vulnerability can lead to unauthorized file uploads on the server, potentially causing further security breaches and disruptions.

Technical Details of CVE-2021-43290

Vulnerability Description

The vulnerability in ThoughtWorks GoCD before 21.3.0 allows a compromised agent to upload a malicious file to the server.

Affected Systems and Versions

Product: ThoughtWorks GoCD
Versions affected: Before 21.3.0

Exploitation Mechanism

Attacker compromises a GoCD agent
Uploads a malicious file into a server directory

Mitigation and Prevention

Immediate Steps to Take

Update ThoughtWorks GoCD to version 21.3.0 or later
Monitor server directories for unauthorized files

Long-Term Security Practices

Implement strict access controls for agents and servers
Conduct regular security audits and scans

Patching and Updates

Ensure timely installation of security patches and updates for ThoughtWorks GoCD.