Merge branch 'render-json-leak' into 'security'

fix for render json include leaks

See merge request !2074

app/controllers/projects/issues_controller.rb

@@ -146,7 +146,7 @@ class Projects::IssuesController < Projects::ApplicationController
       end
 
       format.json do
-        render json: @issue.to_json(include: { milestone: {}, assignee: { methods: :avatar_url }, labels: { methods: :text_color } }, methods: [:task_status, :task_status_short])
+        render json: @issue.to_json(include: { milestone: {}, assignee: { only: [:name, :username], methods: [:avatar_url] }, labels: { methods: :text_color } }, methods: [:task_status, :task_status_short])
       end
     end
 

app/controllers/projects/merge_requests_controller.rb

@@ -308,7 +308,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
       end
 
       format.json do
-        render json: @merge_request.to_json(include: { milestone: {}, assignee: { methods: :avatar_url }, labels: { methods: :text_color } }, methods: [:task_status, :task_status_short])
+        render json: @merge_request.to_json(include: { milestone: {}, assignee: { only: [:name, :username], methods: [:avatar_url] }, labels: { methods: :text_color } }, methods: [:task_status, :task_status_short])
       end
     end
   rescue ActiveRecord::StaleObjectError

spec/controllers/projects/issues_controller_spec.rb

@@ -141,6 +141,24 @@ describe Projects::IssuesController do
 
     it_behaves_like 'update invalid issuable', Issue
 
+    context 'changing the assignee' do
+      it 'limits the attributes exposed on the assignee' do
+        assignee = create(:user)
+        project.add_developer(assignee)
+
+        put :update,
+          namespace_id: project.namespace.to_param,
+          project_id: project,
+          id: issue.iid,
+          issue: { assignee_id: assignee.id },
+          format: :json
+        body = JSON.parse(response.body)
+
+        expect(body['assignee'].keys)
+          .to match_array(%w(name username avatar_url))
+      end
+    end
+
     context 'when moving issue to another private project' do
       let(:another_project) { create(:empty_project, :private) }
 

spec/controllers/projects/merge_requests_controller_spec.rb

@@ -203,6 +203,24 @@ describe Projects::MergeRequestsController do
   end
 
   describe 'PUT update' do
+    context 'changing the assignee' do
+      it 'limits the attributes exposed on the assignee' do
+        assignee = create(:user)
+        project.add_developer(assignee)
+
+        put :update,
+          namespace_id: project.namespace.to_param,
+          project_id: project,
+          id: merge_request.iid,
+          merge_request: { assignee_id: assignee.id },
+          format: :json
+        body = JSON.parse(response.body)
+
+        expect(body['assignee'].keys)
+          .to match_array(%w(name username avatar_url))
+      end
+    end
+
     context 'there is no source project' do
       let(:project)       { create(:project) }
       let(:fork_project)  { create(:forked_project_with_submodules) }