『Java安全』Shiro1.0.0未标准化路径造成越权访问(CVE-2010-3863)复现与浅析

• 影响版本
• 漏洞原理
• 漏洞复现
• • 环境配置
  • • ShiroConfig
    • UserController
    • UserServiceImpl
    • index login unauthorized
    • shiro.ini
  • 复现操作
• 代码审计
• 参考
• 完

1.0.0-incubating

未标准化路径造成/./越权访问

环境采用springboot+shiro，配置基础见下文：

https://ho1aas.blog.csdn.net/article/details/125367641

package com.example.shirospring.config;

import org.apache.shiro.realm.text.IniRealm;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class ShiroConfig {
    @Bean
    public IniRealm getIniRealm(){
        return new IniRealm("classpath:shiro.ini");
    }

    @Bean
    public DefaultWebSecurityManager getDefaultWebSecurityManager(IniRealm iniRealm){
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        securityManager.setRealm(iniRealm);
        return securityManager;
    }

    @Bean
    public ShiroFilterFactoryBean getShiroFilterFactoryBean(DefaultWebSecurityManager defaultWebSecurityManager){
        ShiroFilterFactoryBean filter = new ShiroFilterFactoryBean();
        filter.setSecurityManager(defaultWebSecurityManager);

        Map filterMap = new HashMap<>();

        filterMap.put("/**", "anon");

        filter.setFilterChainDefinitionMap(filterMap);

        filter.setLoginUrl("/login.html");
        filter.setUnauthorizedUrl("/unauthorized.html");

        return filter;
    }
}

package com.example.shirospring.controller;

import com.example.shirospring.service.UserServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    UserServiceImpl userService;

    @PostMapping("/login")
    public String login(String username,String password){
        try {
            userService.checkLogin(username,password);
            return "login successfully!";
        } catch (Exception e) {
            return "error";
        }
    }
}

package com.example.shirospring.service;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl {
    public void checkLogin(String username, String password) throws Exception{
        Subject subject = SecurityUtils.getSubject();
        UsernamePasswordToken token = new UsernamePasswordToken(username, password);
        subject.login(token);
    }
}

写三个简单的html就行了

写两个用户和角色就行

[users]
user=user,user
admin=admin,admin

[roles]
admin=*
user=use

在resources下写一个secret.html

然后在ShiroConfig.getShiroFilterFactoryBean，也就是过滤器，添加需要鉴权才可访问

使用burp在未登录情况访问secret.html，提示未登录需要鉴权

然后尝试访问/./secret.html，读取成功，这一步不能使用hackbar

PathMatchingFilterChainResolver.getChain获取过滤器链然后调用过滤器

获取请求URL，这里直接截取了，没有任何处理

接下来就是依次匹配，直到匹配成功

匹配利用AntPathMatcher.matches

直接全字匹配了，用的是字符串比较

这样配置filter就会导致未授权/越权访问

https://su18.org/post/shiro-1/

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