STRIDE Threat Model

1. Spoofing:

• Threat: Unauthorized access to Cortex components or data.
• Application to Cortex: Previously considered out of scope. Kubernetes network policies can restrict component access.
• Mitigation: Implementation and fine-tuning of Kubernetes network policies to ensure restricted access.

Tampering:

• Threat: Unauthorized modification of data or configuration settings.
• Application to Cortex: Not applicable as Kubernetes containers can’t change their configuration files.
• Mitigation: Rely on the inherent security features of Kubernetes to prevent tampering.

Repudiation:

• Threat: Denying the occurrence of certain actions or events within Cortex.
• Application to Cortex: Considered out of scope. Secure log gathering and preservation methods are available in Kubernetes.
• Mitigation: Utilize Kubernetes logging mechanisms to ensure traceability and log integrity.

Information Disclosure:

• Threat: Unauthorized access to sensitive information within Cortex.
• Application to Cortex: Not a concern due to network policies in Kubernetes that prevent unauthorized access.
• Mitigation: Proper configuration of Kubernetes network policies to protect sensitive data.

Denial of Service (DoS):

• Threat: Disrupting or degrading the availability of Cortex services.
• Application to Cortex: A well-configured Cortex system is resilient to DoS attacks.
• Mitigation: Implement rate limiting and series per tenant limits to prevent DoS attacks.

Elevation of Privilege:

• Threat: Unauthorized escalation of user privileges within Cortex.
• Application to Cortex: Not applicable in Cortex as there is no concept of a superuser or admin user.
• Mitigation: Ensure adherence to Kubernetes access controls.

Additional Considerations:

• Alertmanager Security: Address security threats around Alertmanager, which have already been mitigated. Focus on ensuring these mitigations remain effective.