CVE-2021-37218 : Security Advisory and Response

HashiCorp Nomad and Nomad Enterprise were found to have a vulnerability in the Raft RPC layer, allowing non-server agents to access server-only functionality through a valid certificate, leading to privilege escalation. This issue has been fixed in versions 1.0.10 and 1.1.4.

Understanding CVE-2021-37218

This section dives into the details of the CVE-2021-37218 vulnerability.

What is CVE-2021-37218?

CVE-2021-37218 is a vulnerability in HashiCorp Nomad and Nomad Enterprise that enables non-server agents to escalate privileges by accessing server-only functionality with a valid certificate.

The Impact of CVE-2021-37218

The vulnerability allows unauthorized access to privileged server functionality, potentially leading to malicious activities or unauthorized access.

Technical Details of CVE-2021-37218

This section covers the technical aspects of the CVE-2021-37218 vulnerability.

Vulnerability Description

The vulnerability lies in the Raft RPC layer of HashiCorp Nomad and Nomad Enterprise, enabling unauthorized access to server-only features.

Affected Systems and Versions

HashiCorp Nomad versions up to 1.0.10 and 1.1.4 are affected by this vulnerability.

Exploitation Mechanism

Non-server agents can exploit this vulnerability by utilizing a valid certificate signed by the same CA to gain access to server functions.

Mitigation and Prevention

Learn how to protect your systems from CVE-2021-37218.

Immediate Steps to Take

Update HashiCorp Nomad and Nomad Enterprise to versions 1.0.10 or 1.1.4 to mitigate the vulnerability.

Long-Term Security Practices

Implement strict certificate management and access control policies to prevent unauthorized access.

Patching and Updates

Regularly monitor security advisories from HashiCorp and apply patches promptly to address known vulnerabilities.