Is it necessary to protect JAX-RS requests against CSRF?

问题

By definition REST is stateless and therefore exists no session id (session cookie), because there is no session at all (see also https://stackoverflow.com/a/15746639/5277820).

My Spring Security Java Configuration:

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Configuration
    @Order(1)
    public static class JaxRsWebSecurityConfigurationAdapter extends WebSecurityConfigurerAdapter {

        @Override
        protected void configure(final HttpSecurity http) throws Exception {
            http
                .antMatcher("/services/**")
                .csrf().disable()
                .authorizeRequests()
                    .antMatchers(HttpMethod.OPTIONS, "/services/**").permitAll()              
                    .anyRequest().hasAuthority("ROLE_user")
                    .and()
                .httpBasic()
                    .and()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
             }
        }
    }
}

But I found for example following blog: Stateless Spring Security Part 1: Stateless CSRF protection. Unfortunately the blog does not explain, why one needs CSRF protection.

Is there any other CSRF attack without session cookie?

回答1:

CSRF attacks don't need a session to exist. A CSRF attack consists in doing something on a user's behalf by tricking him/her into clicking a link or submitting a form that goes to an application where the user is logged in.

Whether basic authentication or a session cookie is used to identify the user is irrelevant.

Note that using a cookie doesn't mean that the app is not stateless. A cookie, just like basic authentication, simply consists in sending an additional header with each HTTP request.

回答2:

Access tokens are sometimes stored in a (secured http-only at best) cookie, so that clients don't have to bother adding it in each request manually: cookies are automatically attached to the requests by the browsers. This is a reason why CSRF protection needs to be implemented.

The article you linked proposes to have the clients generate and send the same unique secret value in both a Cookie and a custom HTTP header, which is quite smart:

Considering a website is only allowed to read/write a Cookie for its own domain, only the real site can send the same value in both headers.

That is, if you receive an email with a fake image targeting http://yourserver.com/admin/deleteAll for example (and the server handles it through GET...), the unique secret won't be set in the request header (an old one could still be present in a cookie): the server must reject the request.

来源：https://stackoverflow.com/questions/33211562/is-it-necessary-to-protect-jax-rs-requests-against-csrf

标签

java

rest

spring-security

jax-rs

csrf