Set a strict CSP policy for downloaded attachments, thumbnails, and raw repository files(#38417).

Patch by Holger Just.


git-svn-id: https://svn.redmine.org/redmine/trunk@22295 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/attachments_controller.rb

@@ -321,4 +321,9 @@ class AttachmentsController < ApplicationController
       request.raw_post
     end
   end
+
+  def send_file(path, options={})
+    headers['content-security-policy'] = "default-src 'none'; style-src 'unsafe-inline'; sandbox"
+    super
+  end
 end

app/controllers/repositories_controller.rb

@@ -431,6 +431,11 @@ class RepositoriesController < ApplicationController
     end
   end
 
+  def send_file(path, options={})
+    headers['content-security-policy'] = "default-src 'none'; style-src 'unsafe-inline'; sandbox"
+    super
+  end
+
   def valid_name?(rev)
     return true if rev.nil?
     return true if REV_PARAM_RE.match?(rev)