What is the solution for Mass Assignment: Insecure Binder Configuration Vulnerability?

I have this Controller in Java:

@Controller
public class AuthenticationController extends AbstractController { @RequestMapping(value = Constantes.MAPPING_AUTH_BASE_ASP, method = { RequestMethod.POST }) public String authenticate(@Valid ComunicationWithAspRequest comunicationWithAspRequest, BindingResult result, RedirectAttributes redirectAttributes, HttpSession sesion) throws Exception { ... ... ... }
}

When I scan my code in Fortify, the object comunicationWithAspRequest causes the Mass Assignment: Insecure Binder Configuration Vulnerability. Is possible to control which HTTP request parameters will be used in the binding process and which ones will be ignored?

2 Answers

You may refer to the problem Prevent mass assignment in Spring MVC with Roo.

In your case, you can use @InitBinder provided by Spring MVC. @InitBinder would specify the white list for json and bean mapping.

In my experience, I used @RequestBody for auto-binding. I need to add @JsonIgnore to specify the property that would not include for the mapping.

SimpleController.java

@RequestMapping(value="/simple")
public String simple(@Valid @RequestBody User user){ simpleService.doSomething();
}

User.java

public class User{ private String name; @JsonIgnore private String dummy; public void getName(){return name;} public void setName(name){this.name = name;} public void getDummy(){return dummy;} public void setDummy(dummy){this.dummy= dummy;}
}

By adding @JsonIgnoreProperties(ignoreUnknown = true) annotation on the class level the issue can be resolve in case we don't know what to ignore.

@JsonIgnoreProperties(ignoreUnknown = true)
public class className{
}