Add support for single-IP external scanners

lib/msf/core/modules/external/shim.rb

@@ -13,6 +13,8 @@ class Msf::Modules::External::Shim
       capture_server(mod)
     when 'dos'
       dos(mod)
+    when 'scanner.single'
+      single_scanner(mod)
     when 'scanner.multi'
       multi_scanner(mod)
     else
@@ -30,13 +32,19 @@ class Msf::Modules::External::Shim
     render_template('common_metadata.erb', meta)
   end
 
-  def self.mod_meta_common(mod, meta = {})
+  def self.mod_meta_common(mod, meta = {}, drop_rhost: true)
     meta[:path]        = mod.path.dump
     meta[:name]        = mod.meta['name'].dump
     meta[:description] = mod.meta['description'].dump
     meta[:authors]     = mod.meta['authors'].map(&:dump).join(",\n          ")
 
-    meta[:options]     = mod.meta['options'].map do |n, o|
+    options = if drop_rhost
+      mod.meta['options'].reject {|n, o| n == 'rhost'}
+    else
+      mod.meta['options']
+    end
+
+    meta[:options]     = options.map do |n, o|
       "Opt#{o['type'].camelize}.new(#{n.dump},
         [#{o['required']}, #{o['description'].dump}, #{o['default'].inspect}])"
     end.join(",\n          ")
@@ -71,6 +79,16 @@ class Msf::Modules::External::Shim
     render_template('capture_server.erb', meta)
   end
 
+  def self.single_scanner(mod)
+    meta = mod_meta_common(mod, drop_rhost: true)
+    meta[:date] = mod.meta['date'].dump
+    meta[:references] = mod.meta['references'].map do |r|
+      "[#{r['type'].upcase.dump}, #{r['ref'].dump}]"
+    end.join(",\n          ")
+
+    render_template('single_scanner.erb', meta)
+  end
+
   def self.multi_scanner(mod)
     meta = mod_meta_common(mod)
     meta[:date] = mod.meta['date'].dump

lib/msf/core/modules/external/templates/single_scanner.erb

@@ -0,0 +1,31 @@
+require 'msf/core/modules/external/bridge'
+require 'msf/core/module/external'
+
+class MetasploitModule < Msf::Auxiliary
+  include Msf::Auxiliary::Scanner
+  include Msf::Module::External
+
+  def initialize
+    super({
+	  <%= common_metadata meta %>
+      'References'  =>
+        [
+          <%= meta[:references] %>
+        ],
+      'DisclosureDate' => <%= meta[:date] %>,
+      })
+
+      register_options([
+        <%= meta[:options] %>
+      ])
+  end
+
+  def run_host(ip)
+    print_status("Running for #{ip}...")
+    mod = Msf::Modules::External::Bridge.open(<%= meta[:path] %>)
+    rhost = datastore.delete('RHOST')
+    datastore['rhost'] = rhost
+    mod.run(datastore)
+    wait_status(mod)
+  end
+end