CVE-2021-39133 : Security Advisory and Response

Rundeck, an open-source automation service, was identified with a CVE regarding Cross-Site Request Forgery (CSRF) vulnerabilities that could allow remote attackers to execute untrusted code on the server.

Understanding CVE-2021-39133

This section delves into the specifics of the CVE and its implications.

What is CVE-2021-39133?

CVE-2021-39133 highlights a CSRF vulnerability in Rundeck versions < 3.3.14 and >= 3.4.0, < 3.4.3. An attacker with admin access to the system resource type could exploit this flaw to force the server to run unauthorized code on all Rundeck editions.

The Impact of CVE-2021-39133

The vulnerability's CVSS score is 7.2, categorizing it as high severity due to its potential for significant confidentiality, integrity, and availability impacts. The attack vector is network-based with no user interaction required.

Technical Details of CVE-2021-39133

Exploring the technical aspects of the CVE to understand its full scope.

Vulnerability Description

The vulnerability involves a CSRF attack that allows an attacker to execute untrusted code on the Rundeck server, leveraging the admin access to the system resource type.

Affected Systems and Versions

Versions < 3.3.14 and >= 3.4.0, < 3.4.3 of Rundeck are vulnerable to this exploit.

Exploitation Mechanism

The vulnerability can be exploited by a remote attacker with admin privileges, manipulating the CSRF vulnerability to inject and execute malicious code.

Mitigation and Prevention

Understanding the steps to mitigate the risks associated with CVE-2021-39133.

Immediate Steps to Take

Update Rundeck to versions 3.3.14 or 3.4.3, where patches addressing the CSRF vulnerability have been implemented.

Long-Term Security Practices

Regularly monitor and apply security patches and updates to prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security advisories and promptly apply relevant patches and updates to maintain a secure Rundeck installation.