Fix Improper Assets Management in Spring Boot
Improper Assets Management in Spring Boot often manifests as 'Shadow APIs' or exposed Actuator endpoints. Attackers leverage these unmapped or legacy routes to leak environment variables, heap dumps, or internal configuration. If you aren't auditing your endpoint inventory and restricting management interfaces, you're running a blind spot in your perimeter.
The Vulnerable Pattern
# application.properties # DANGEROUS: Exposing all actuator endpoints to the public web management.endpoints.web.exposure.include=* management.endpoint.env.enabled=true management.endpoint.heapdump.enabled=true
No Spring Security configuration present to gate these routes.
The Secure Implementation
Fixing asset management requires three tiers of defense. 1) Minimize visibility: Only expose the specific endpoints required for operations (e.g., health). 2) Network Segregation: Move management traffic to a different port (9001) that can be firewalled from external traffic. 3) Explicit Authorization: Use Spring Security to enforce Role-Based Access Control (RBAC) on all routes. Use 'denyAll()' as a default for any unmapped or legacy routes to prevent 'zombie' APIs from leaking data.
# application.properties # Limit exposure to essential health/info only management.endpoints.web.exposure.include=health,info # Move management endpoints to a separate internal port management.server.port=9001 management.endpoints.web.base-path=/private/management
// SecurityConfig.java @Configuration @EnableWebSecurity public class SecurityConfig { @Bean public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception { http.authorizeHttpRequests(auth -> auth .requestMatchers(“/private/management/“).hasRole(“ADMIN”) .requestMatchers(“/api/v2/”).authenticated() .anyRequest().denyAll()); return http.build(); } }
Your Spring Boot API
might be exposed to Improper Assets Management
74% of Spring Boot apps fail this check. Hackers use automated scanners to find this specific flaw. Check your codebase before they do.
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