diff --git a/plugins/providers/virtualbox/driver/meta.rb b/plugins/providers/virtualbox/driver/meta.rb
index b535ebcc7..530eaefeb 100644
--- a/plugins/providers/virtualbox/driver/meta.rb
+++ b/plugins/providers/virtualbox/driver/meta.rb
@@ -44,7 +44,8 @@ module VagrantPlugins
           driver_map   = {
             "4.0" => Version_4_0,
             "4.1" => Version_4_1,
-            "4.2" => Version_4_2
+            "4.2" => Version_4_2,
+            "4.3" => Version_4_3
           }
 
           if @version.start_with?("4.2.14")
diff --git a/plugins/providers/virtualbox/driver/version_4_3.rb b/plugins/providers/virtualbox/driver/version_4_3.rb
new file mode 100644
index 000000000..123906502
--- /dev/null
+++ b/plugins/providers/virtualbox/driver/version_4_3.rb
@@ -0,0 +1,499 @@
+require 'log4r'
+
+require "vagrant/util/platform"
+
+require File.expand_path("../base", __FILE__)
+
+module VagrantPlugins
+  module ProviderVirtualBox
+    module Driver
+      # Driver for VirtualBox 4.3.x
+      class Version_4_3 < Base
+        def initialize(uuid)
+          super()
+
+          @logger = Log4r::Logger.new("vagrant::provider::virtualbox_4_3")
+          @uuid = uuid
+        end
+
+        def clear_forwarded_ports
+          args = []
+          read_forwarded_ports(@uuid).each do |nic, name, _, _|
+            args.concat(["--natpf#{nic}", "delete", name])
+          end
+
+          execute("modifyvm", @uuid, *args) if !args.empty?
+        end
+
+        def clear_shared_folders
+          info = execute("showvminfo", @uuid, "--machinereadable", :retryable => true)
+          info.split("\n").each do |line|
+            if line =~ /^SharedFolderNameMachineMapping\d+="(.+?)"$/
+              execute("sharedfolder", "remove", @uuid, "--name", $1.to_s)
+            end
+          end
+        end
+
+        def create_dhcp_server(network, options)
+          execute("dhcpserver", "add", "--ifname", network,
+                  "--ip", options[:dhcp_ip],
+                  "--netmask", options[:netmask],
+                  "--lowerip", options[:dhcp_lower],
+                  "--upperip", options[:dhcp_upper],
+                  "--enable")
+        end
+
+        def create_host_only_network(options)
+          # Create the interface
+          execute("hostonlyif", "create") =~ /^Interface '(.+?)' was successfully created$/
+            name = $1.to_s
+
+          # Configure it
+          execute("hostonlyif", "ipconfig", name,
+                  "--ip", options[:adapter_ip],
+                  "--netmask", options[:netmask])
+
+          # Return the details
+          return {
+            :name => name,
+            :ip   => options[:adapter_ip],
+            :netmask => options[:netmask],
+            :dhcp => nil
+          }
+        end
+
+        def delete
+          execute("unregistervm", @uuid, "--delete")
+        end
+
+        def delete_unused_host_only_networks
+          networks = []
+          execute("list", "hostonlyifs").split("\n").each do |line|
+            networks << $1.to_s if line =~ /^Name:\s+(.+?)$/
+          end
+
+          execute("list", "vms").split("\n").each do |line|
+            if line =~ /^".+?"\s+\{(.+?)\}$/
+              info = execute("showvminfo", $1.to_s, "--machinereadable", :retryable => true)
+              info.split("\n").each do |inner_line|
+                if inner_line =~ /^hostonlyadapter\d+="(.+?)"$/
+                  networks.delete($1.to_s)
+                end
+              end
+            end
+          end
+
+          networks.each do |name|
+            # First try to remove any DHCP servers attached. We use `raw` because
+            # it is okay if this fails. It usually means that a DHCP server was
+            # never attached.
+            raw("dhcpserver", "remove", "--ifname", name)
+
+            # Delete the actual host only network interface.
+            execute("hostonlyif", "remove", name)
+          end
+        end
+
+        def discard_saved_state
+          execute("discardstate", @uuid)
+        end
+
+        def enable_adapters(adapters)
+          args = []
+          adapters.each do |adapter|
+            args.concat(["--nic#{adapter[:adapter]}", adapter[:type].to_s])
+
+            if adapter[:bridge]
+              args.concat(["--bridgeadapter#{adapter[:adapter]}",
+                          adapter[:bridge]])
+            end
+
+            if adapter[:hostonly]
+              args.concat(["--hostonlyadapter#{adapter[:adapter]}",
+                          adapter[:hostonly]])
+            end
+
+            if adapter[:mac_address]
+              args.concat(["--macaddress#{adapter[:adapter]}",
+                          adapter[:mac_address]])
+            end
+
+            if adapter[:nic_type]
+              args.concat(["--nictype#{adapter[:adapter]}", adapter[:nic_type].to_s])
+            end
+          end
+
+          execute("modifyvm", @uuid, *args)
+        end
+
+        def execute_command(command)
+          raw(*command)
+        end
+
+        def export(path)
+          # TODO: Progress
+          execute("export", @uuid, "--output", path.to_s)
+        end
+
+        def forward_ports(ports)
+          args = []
+          ports.each do |options|
+            pf_builder = [options[:name],
+              options[:protocol] || "tcp",
+              options[:hostip] || "",
+              options[:hostport],
+              options[:guestip] || "",
+              options[:guestport]]
+
+            args.concat(["--natpf#{options[:adapter] || 1}",
+                        pf_builder.join(",")])
+          end
+
+          execute("modifyvm", @uuid, *args) if !args.empty?
+        end
+
+        def halt
+          execute("controlvm", @uuid, "poweroff")
+        end
+
+        def import(ovf)
+          ovf = Vagrant::Util::Platform.cygwin_windows_path(ovf)
+
+          output = ""
+          total = ""
+          last  = 0
+          execute("import", ovf) do |type, data|
+            if type == :stdout
+              # Keep track of the stdout so that we can get the VM name
+              output << data
+            elsif type == :stderr
+              # Append the data so we can see the full view
+              total << data
+
+              # Break up the lines. We can't get the progress until we see an "OK"
+              lines = total.split("\n")
+              if lines.include?("OK.")
+                # The progress of the import will be in the last line. Do a greedy
+                # regular expression to find what we're looking for.
+                if lines.last =~ /.+(\d{2})%/
+                  current = $1.to_i
+                  if current > last
+                    last = current
+                    yield current if block_given?
+                  end
+                end
+              end
+            end
+          end
+
+          # Find the name of the VM name
+          if output !~ /Suggested VM name "(.+?)"/
+            @logger.error("Couldn't find VM name in the output.")
+            return nil
+          end
+
+          name = $1.to_s
+
+          output = execute("list", "vms")
+          if output =~ /^"#{Regexp.escape(name)}" \{(.+?)\}$/
+            return $1.to_s
+          end
+
+          nil
+        end
+
+        def max_network_adapters
+          36
+        end
+
+        def read_forwarded_ports(uuid=nil, active_only=false)
+          uuid ||= @uuid
+
+          @logger.debug("read_forward_ports: uuid=#{uuid} active_only=#{active_only}")
+
+          results = []
+          current_nic = nil
+          info = execute("showvminfo", uuid, "--machinereadable", :retryable => true)
+          info.split("\n").each do |line|
+            # This is how we find the nic that a FP is attached to,
+            # since this comes first.
+            current_nic = $1.to_i if line =~ /^nic(\d+)=".+?"$/
+
+              # If we care about active VMs only, then we check the state
+              # to verify the VM is running.
+              if active_only && line =~ /^VMState="(.+?)"$/ && $1.to_s != "running"
+                return []
+              end
+
+            # Parse out the forwarded port information
+            if line =~ /^Forwarding.+?="(.+?),.+?,.*?,(.+?),.*?,(.+?)"$/
+              result = [current_nic, $1.to_s, $2.to_i, $3.to_i]
+              @logger.debug("  - #{result.inspect}")
+              results << result
+            end
+          end
+
+          results
+        end
+
+        def read_bridged_interfaces
+          execute("list", "bridgedifs").split("\n\n").collect do |block|
+            info = {}
+
+            block.split("\n").each do |line|
+              if line =~ /^Name:\s+(.+?)$/
+                info[:name] = $1.to_s
+              elsif line =~ /^IPAddress:\s+(.+?)$/
+                info[:ip] = $1.to_s
+              elsif line =~ /^NetworkMask:\s+(.+?)$/
+                info[:netmask] = $1.to_s
+              elsif line =~ /^Status:\s+(.+?)$/
+                info[:status] = $1.to_s
+              end
+            end
+
+            # Return the info to build up the results
+            info
+          end
+        end
+
+        def read_guest_additions_version
+          output = execute("guestproperty", "get", @uuid, "/VirtualBox/GuestAdd/Version",
+                           :retryable => true)
+          if output =~ /^Value: (.+?)$/
+            # Split the version by _ since some distro versions modify it
+            # to look like this: 4.1.2_ubuntu, and the distro part isn't
+            # too important.
+            value = $1.to_s
+            return value.split("_").first
+          end
+
+          # If we can't get the guest additions version by guest property, try
+          # to get it from the VM info itself.
+          info = execute("showvminfo", @uuid, "--machinereadable", :retryable => true)
+          info.split("\n").each do |line|
+            return $1.to_s if line =~ /^GuestAdditionsVersion="(.+?)"$/
+          end
+
+          return nil
+        end
+
+        def read_host_only_interfaces
+          dhcp = {}
+          execute("list", "dhcpservers", :retryable => true).split("\n\n").each do |block|
+            info = {}
+
+            block.split("\n").each do |line|
+              if line =~ /^NetworkName:\s+HostInterfaceNetworking-(.+?)$/
+                info[:network] = $1.to_s
+              elsif line =~ /^IP:\s+(.+?)$/
+                info[:ip] = $1.to_s
+              elsif line =~ /^lowerIPAddress:\s+(.+?)$/
+                info[:lower] = $1.to_s
+              elsif line =~ /^upperIPAddress:\s+(.+?)$/
+                info[:upper] = $1.to_s
+              end
+            end
+
+            # Set the DHCP info
+            dhcp[info[:network]] = info
+          end
+
+          execute("list", "hostonlyifs", :retryable => true).split("\n\n").collect do |block|
+            info = {}
+
+            block.split("\n").each do |line|
+              if line =~ /^Name:\s+(.+?)$/
+                info[:name] = $1.to_s
+              elsif line =~ /^IPAddress:\s+(.+?)$/
+                info[:ip] = $1.to_s
+              elsif line =~ /^NetworkMask:\s+(.+?)$/
+                info[:netmask] = $1.to_s
+              elsif line =~ /^Status:\s+(.+?)$/
+                info[:status] = $1.to_s
+              end
+            end
+
+            # Set the DHCP info if it exists
+            info[:dhcp] = dhcp[info[:name]] if dhcp[info[:name]]
+
+            info
+          end
+        end
+
+        def read_mac_address
+          info = execute("showvminfo", @uuid, "--machinereadable", :retryable => true)
+          info.split("\n").each do |line|
+            return $1.to_s if line =~ /^macaddress1="(.+?)"$/
+          end
+
+          nil
+        end
+
+        def read_mac_addresses
+          macs = {}
+          info = execute("showvminfo", @uuid, "--machinereadable", :retryable => true)
+          info.split("\n").each do |line|
+            if matcher = /^macaddress(\d+)="(.+?)"$/.match(line)
+              adapter = matcher[1].to_i
+              mac = matcher[2].to_s
+              macs[adapter] = mac
+            end
+          end
+          macs
+        end
+
+        def read_machine_folder
+          execute("list", "systemproperties", :retryable => true).split("\n").each do |line|
+            if line =~ /^Default machine folder:\s+(.+?)$/i
+              return $1.to_s
+            end
+          end
+
+          nil
+        end
+
+        def read_network_interfaces
+          nics = {}
+          info = execute("showvminfo", @uuid, "--machinereadable", :retryable => true)
+          info.split("\n").each do |line|
+            if line =~ /^nic(\d+)="(.+?)"$/
+              adapter = $1.to_i
+              type    = $2.to_sym
+
+              nics[adapter] ||= {}
+              nics[adapter][:type] = type
+            elsif line =~ /^hostonlyadapter(\d+)="(.+?)"$/
+              adapter = $1.to_i
+              network = $2.to_s
+
+              nics[adapter] ||= {}
+              nics[adapter][:hostonly] = network
+            elsif line =~ /^bridgeadapter(\d+)="(.+?)"$/
+              adapter = $1.to_i
+              network = $2.to_s
+
+              nics[adapter] ||= {}
+              nics[adapter][:bridge] = network
+            end
+          end
+
+          nics
+        end
+
+        def read_state
+          output = execute("showvminfo", @uuid, "--machinereadable", :retryable => true)
+          if output =~ /^name="<inaccessible>"$/
+            return :inaccessible
+          elsif output =~ /^VMState="(.+?)"$/
+            return $1.to_sym
+          end
+
+          nil
+        end
+
+        def read_used_ports
+          ports = []
+          execute("list", "vms", :retryable => true).split("\n").each do |line|
+            if line =~ /^".+?" \{(.+?)\}$/
+              uuid = $1.to_s
+
+              # Ignore our own used ports
+              next if uuid == @uuid
+
+              read_forwarded_ports(uuid, true).each do |_, _, hostport, _|
+                ports << hostport
+              end
+            end
+          end
+
+          ports
+        end
+
+        def read_vms
+          results = {}
+          execute("list", "vms", :retryable => true).split("\n").each do |line|
+            if line =~ /^"(.+?)" \{(.+?)\}$/
+              results[$1.to_s] = $2.to_s
+            end
+          end
+
+          results
+        end
+
+        def set_mac_address(mac)
+          execute("modifyvm", @uuid, "--macaddress1", mac)
+        end
+
+        def set_name(name)
+          execute("modifyvm", @uuid, "--name", name, :retryable => true)
+        end
+
+        def share_folders(folders)
+          folders.each do |folder|
+            args = ["--name",
+              folder[:name],
+              "--hostpath",
+              folder[:hostpath]]
+            args << "--transient" if folder.has_key?(:transient) && folder[:transient]
+
+            # Add the shared folder
+            execute("sharedfolder", "add", @uuid, *args)
+
+            # Enable symlinks on the shared folder
+            execute("setextradata", @uuid, "VBoxInternal2/SharedFoldersEnableSymlinksCreate/#{folder[:name]}", "1")
+          end
+        end
+
+        def ssh_port(expected_port)
+          @logger.debug("Searching for SSH port: #{expected_port.inspect}")
+
+          # Look for the forwarded port only by comparing the guest port
+          read_forwarded_ports.each do |_, _, hostport, guestport|
+            return hostport if guestport == expected_port
+          end
+
+          nil
+        end
+
+        def resume
+          @logger.debug("Resuming paused VM...")
+          execute("controlvm", @uuid, "resume")
+        end
+
+        def start(mode)
+          command = ["startvm", @uuid, "--type", mode.to_s]
+          r = raw(*command)
+
+          if r.exit_code == 0 || r.stdout =~ /VM ".+?" has been successfully started/
+            # Some systems return an exit code 1 for some reason. For that
+            # we depend on the output.
+            return true
+          end
+
+          # If we reached this point then it didn't work out.
+          raise Vagrant::Errors::VBoxManageError, :command => command.inspect
+        end
+
+        def suspend
+          execute("controlvm", @uuid, "savestate")
+        end
+
+        def verify!
+          # This command sometimes fails if kernel drivers aren't properly loaded
+          # so we just run the command and verify that it succeeded.
+          execute("list", "hostonlyifs")
+        end
+
+        def verify_image(path)
+          r = raw("import", path.to_s, "--dry-run")
+          return r.exit_code == 0
+        end
+
+        def vm_exists?(uuid)
+          raw("showvminfo", uuid).exit_code == 0
+        end
+      end
+    end
+  end
+end
diff --git a/plugins/providers/virtualbox/plugin.rb b/plugins/providers/virtualbox/plugin.rb
index d313ab4ba..8349c5cb1 100644
--- a/plugins/providers/virtualbox/plugin.rb
+++ b/plugins/providers/virtualbox/plugin.rb
@@ -29,6 +29,7 @@ module VagrantPlugins
       autoload :Version_4_0, File.expand_path("../driver/version_4_0", __FILE__)
       autoload :Version_4_1, File.expand_path("../driver/version_4_1", __FILE__)
       autoload :Version_4_2, File.expand_path("../driver/version_4_2", __FILE__)
+      autoload :Version_4_3, File.expand_path("../driver/version_4_3", __FILE__)
     end
 
     module Model