Broken Access Control in Gorilla Mux
How Broken Access Control Manifests in Gorilla Mux
Broken Access Control in Gorilla Mux applications typically emerges from two core patterns: improper route handling and missing authorization checks. The first pattern occurs when developers use overly permissive route patterns that capture unintended resources. For example, a route like /users/{id}/profile might allow any authenticated user to access any profile by simply changing the ID parameter, creating a classic Insecure Direct Object Reference (IDOR) vulnerability.
The second pattern involves missing middleware that should enforce authorization. Many Gorilla Mux applications define routes without wrapping them in authentication or authorization middleware. Consider this vulnerable pattern:
Gorilla Mux-Specific Detection
Detecting Broken Access Control in Gorilla Mux applications requires both static analysis of the routing structure and dynamic testing of the access control mechanisms. Static analysis involves examining the router configuration to identify routes that lack proper authorization middleware.
Start by reviewing your router setup code. Look for patterns where routes are defined without middleware wrapping:
Gorilla Mux-Specific Remediation
Remediating Broken Access Control in Gorilla Mux requires implementing proper authorization checks at the router level and within handlers. The most effective approach uses middleware to centralize access control logic.
First, implement authentication middleware that verifies user identity and attaches user context to requests:
Frequently Asked Questions
How does middleBrick detect Broken Access Control in Gorilla Mux applications?
middleBrick performs both static analysis of your API structure and dynamic testing. It identifies routes without proper authorization middleware, then actively tests for IDOR vulnerabilities by manipulating path parameters with authenticated requests. The scanner attempts to access resources using IDs that don't match the authenticated user's ID, verifying that proper access controls are enforced. It also tests for privilege escalation by attempting to access admin endpoints with regular user credentials.Can middleBrick scan my Gorilla Mux API if it's behind authentication?
Yes, middleBrick can scan authenticated APIs. You can provide authentication credentials or tokens as part of the scan configuration. The scanner will use these credentials to test the authenticated attack surface, including verifying that authorization checks work correctly after authentication succeeds. This allows middleBrick to test the complete security posture of your API, not just the unauthenticated endpoints.