dup http resource so modules don't inadvertantly modify it

git-svn-id: file:///home/svn/framework3/trunk@7608 4d416f70-5f16-0410-b530-b9f4589650da

lib/msf/core/exploit/http.rb

@@ -502,7 +502,9 @@ module Exploit::Remote::HttpServer
 	# Returns the last-used resource path
 	#
 	def get_resource
-		@service_path
+		# We don't want modules modifying their service_path inadvertantly, so
+		# give them a dup.  Can be nil during module setup.
+		@service_path ? @service_path.dup : nil
 	end
 
 	#