Fix #12895, fix console.read does not return command output

Author: timwr

lib/msf/ui/console/driver.rb

@@ -479,7 +479,7 @@ def unknown_command(method, line)
 
         self.busy = true
         begin
-          system(line)
+          run_unknown_command(line)
         rescue ::Errno::EACCES, ::Errno::ENOENT
           print_error("Permission denied exec: #{line}")
         end
@@ -500,6 +500,10 @@ def unknown_command(method, line)
     super
   end
 
+  def run_unknown_command(command)
+    system(command)
+  end
+
   ##
   #
   # Handlers for various global configuration values

lib/msf/ui/web/web_console.rb

@@ -32,6 +32,15 @@ module WebConsoleShell
     def supports_color?
       false
     end
+
+    def run_unknown_command(command)
+      Open3.popen2e(command) {|stdin,output,thread|
+        output.each {|outline|
+          print_line(outline.chomp)
+        }
+      }
+    end
+
   end
 
   def initialize(framework, console_id, opts={})