GHSA-j8hf-cp34-g4j7

Описание

Summary

Dragonfly Manager's Job REST API endpoints lack authentication, allowing unauthenticated attackers to create, query, modify, and delete jobs, potentially leading to resource exhaustion, information disclosure, and service disruption.

Affected Products

• Product: Dragonfly
• Component: Manager (REST API)
• Affected Versions: v2.x (based on source code analysis, including v2.4.0)
• Affected Endpoints: /api/v1/jobs

Vulnerability Details

Description

Dragonfly Manager's Job API endpoints (/api/v1/jobs) lack JWT authentication middleware and RBAC authorization checks in the routing configuration. This allows any unauthenticated user with access to the Manager API to perform the following operations:

1. List all jobs (GET /api/v1/jobs)
2. Create new jobs (POST /api/v1/jobs)
3. Query job details (GET /api/v1/jobs/:id)
4. Modify jobs (PATCH /api/v1/jobs/:id)
5. Delete jobs (DELETE /api/v1/jobs/:id)

Technical Root Cause

In the source code file manager/router/router.go at lines 204-211, the Job API route group lacks authentication middleware:

In contrast, other API endpoints (such as /clusters) are correctly configured with authentication:

The developer left a TODO comment in the code, indicating this is a known but unresolved issue.

Proof of Concept

Environment Setup

Prerequisites

• Kubernetes cluster (Kind/Minikube/GKE, etc.)
• Helm 3.8.0+
• kubectl
• curl and jq

Deployment Steps

1. Add Dragonfly Helm Repository

2. Generate Deployment Manifest

3. Deploy to Kubernetes

Expected Output:

4. Setup Port Forwarding

Exploitation Steps

Step 1: Verify Unauthenticated Access

Command:

Actual Output:

HTTP Status Code: 200 OK

Analysis: The API returns a successful response instead of 401 Unauthorized, confirming the lack of authentication.

Step 2: Create Unauthorized Job

Command:

Actual Output:

HTTP Status Code: 200 OK

Analysis: Successfully created a Job (ID: 2) without any authentication token.

Step 3: Query Job Details

Command:

Actual Output:

HTTP Status Code: 200 OK

Step 4: Modify Job

Command:

Actual Output:

HTTP Status Code: 200 OK

Step 5: Delete Job

Command:

Actual Output:

HTTP Status Code: 200 OK

Step 6: Comparison Test - Authenticated Endpoint

Command:

Actual Output:

HTTP Status Code: 401 Unauthorized

Analysis: This proves that the authentication mechanism itself is working correctly; only the Job API endpoints are missing the configuration.

Automated POC Script

Complete automated verification script available at:

• Script: poc.sh
• Output Log: poc_output.log

Execution Summary:

Impact Analysis

Direct Impact

1. Unauthorized Job Management: Attackers can fully control the Job lifecycle (CRUD operations)
2. Information Disclosure: Can query all jobs, potentially exposing internal URLs, configurations, and business logic
3. Service Disruption: Can delete legitimate jobs, affecting normal file distribution services
4. Resource Exhaustion: Can create massive numbers of jobs leading to system resource exhaustion (DoS)

Potential Attack Scenarios

1. Resource Exhaustion Attack

2. SSRF Risk: Through the URL parameter of Preheat jobs, SSRF attacks may be triggered (although there is SafeDialer protection, risks still exist)

3. Business Logic Disruption: Delete or modify critical jobs, affecting CDN preheating and file distribution functionality

Affected Deployment Scenarios

• Manager API exposed on the public internet or untrusted networks
• Malicious users or compromised systems in internal networks
• Tenant isolation failures in multi-tenant environments

Remediation

Recommended Fix

Add authentication and authorization middleware to the Job API in the manager/router/router.go file:

Temporary Mitigation

Before the fix is released, the following mitigation measures can be taken:

1. Network Isolation: Restrict network access to the Manager API

   • Use firewall rules to limit source IPs
   • Only allow trusted internal networks to access
   • Use Kubernetes NetworkPolicy to restrict Pod-to-Pod communication

2. API Gateway: Deploy an API gateway in front of Manager for authentication

   • Use reverse proxies like Nginx/Kong/Traefik
   • Configure OAuth2/JWT validation

3. Monitoring and Alerting: Monitor abnormal access patterns to Job API

   • Log all Job API calls
   • Set up alerts for abnormal job creation/deletion

Verify Fix

After the fix, all unauthenticated requests should return 401 Unauthorized:

Expected Output:

Appendix: Complete Verification Logs

Deployment Verification Logs

POC Execution Complete Logs

See poc_output.log file for details.

Patches

• Dragonfy v2.4.1 and above.

Workarounds

There are no effective workarounds, beyond upgrading.