Spring Cloud Gateway中对admin端点进行认证

阿提说说

发布于 2023-12-09 10:31:26

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发布于 2023-12-09 10:31:26

前言

我们被扫了一个漏洞，SpringBoot Actuator 未授权访问，漏洞描述是这样的：

Actuator 是 springboot 提供的用来对应用系统进行自省和监控的功能模块，借助于 Actuator 开发者可以很方便地对应用系统某些监控指标进行查看、统计等。在 Actuator 启用的情况下，如果没有做好相关权限控制，非法用户可通过访问默认的执行器端点（endpoints）来获取应用系统中的监控信息，从而导致信息泄露甚至服务器被接管的事件发生

正文

如果没有对admin的端点进行鉴权，那么对于开放的网关服务，可以直接通过xx/actuator访问，这将是非常危险的，如果你还暴露了所有端点，那么还可以获取环境中的账号密码信息，即使admin做了脱敏。

要对端点进行鉴权，也非常简单，只需要要引入spring-security依赖即可，下面是Spring Cloud Gateway中的配置。

1、引入xml依赖

spring-boot-starter-web scope 是provided,引入gateway中不能有web

 <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-security</artifactId>
 </dependency>
 <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
     <scope>provided</scope>
 </dependency>

2、针对Admin端点认证的配置，只对/actuator/**进行认证，其他地址放行，使用业务自身认证。

package com.frame.ops.admin.client.config;

import org.springframework.context.annotation.Bean;
import org.springframework.core.annotation.Order;
import org.springframework.security.config.web.server.ServerHttpSecurity;
import org.springframework.security.web.server.SecurityWebFilterChain;

/**
 * 对客户端的actuator接口进行鉴权
 * 引入后，gateway 有性能问题
 */
@EnableWebFluxSecurity
@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.REACTIVE)
public class ReactiveAdminSecurityConfig {

    @Bean
    @Order(1)
    public SecurityWebFilterChain authorizationServerSecurityFilterChain(ServerHttpSecurity http) {
        http.authorizeExchange()
                //只对actuator接口认证
               .pathMatchers("/actuator/**").authenticated()
               .anyExchange().permitAll()
               .and().httpBasic().and().csrf().disable();
        return http.build();
    }

}

3、如果是Servlet，配置为

package com.frame.ops.admin.client.config;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.security.SecurityProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.core.annotation.Order;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;
import org.springframework.util.StringUtils;

import java.util.List;
import java.util.regex.Pattern;

/**
 * 对客户端的actuator接口进行鉴权
 */
@Order(1)
@EnableWebSecurity
@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
public class AdminSecurityConfig extends WebSecurityConfigurerAdapter {

	//这个InMemoryUserDetailsManager，如果你的业务中也使用了spring security，那么需要自定义一   //个，防止admin认证使用自定义的处理逻辑
    @Autowired
    private InMemoryUserDetailsManager inMemoryUserDetailsManager;

    private static final String NOOP_PASSWORD_PREFIX = "{noop}";

    private static final Pattern PASSWORD_ALGORITHM_PATTERN = Pattern.compile("^\\{.+}.*$");

    private static final Log logger = LogFactory.getLog(AdminSecurityConfig.class);

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(inMemoryUserDetailsManager);
    }

    @Bean
    public InMemoryUserDetailsManager inMemoryUserDetailsManager(SecurityProperties properties,
                                                                 ObjectProvider<PasswordEncoder> passwordEncoder) {
        SecurityProperties.User user = properties.getUser();
        List<String> roles = user.getRoles();
        return new InMemoryUserDetailsManager(
                User.withUsername(user.getName()).password(getOrDeducePassword(user, passwordEncoder.getIfAvailable()))
                        .roles(StringUtils.toStringArray(roles)).build());
    }

    private String getOrDeducePassword(SecurityProperties.User user, PasswordEncoder encoder) {
        String password = user.getPassword();
        if (user.isPasswordGenerated()) {
            logger.warn(String.format(
                    "%n%nUsing generated security password: %s%n%nThis generated password is for development use only. "
                            + "Your security configuration must be updated before running your application in "
                            + "production.%n",
                    user.getPassword()));
        }
        if (encoder != null || PASSWORD_ALGORITHM_PATTERN.matcher(password).matches()) {
            return password;
        }
        return NOOP_PASSWORD_PREFIX + password;
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable().authorizeRequests()
                //只有actuator开头的请求才需要认证
                .antMatchers("/actuator/**").authenticated()
                .anyRequest().permitAll()
                .and().httpBasic();
    }

}