Add latest changes from gitlab-org/security/gitlab@12-7-stable-ee

56 files changed, 512 insertions, 58 deletions

diff --git a/Gemfile b/Gemfile
index 951ae73a318..0c3974ceeba 100644
--- a/Gemfile
+++ b/Gemfile
@@ -65,7 +65,7 @@ gem 'u2f', '~> 0.2.1'
 
 # GitLab Pages
 gem 'validates_hostname', '~> 1.0.6'
-gem 'rubyzip', '~> 1.3.0', require: 'zip'
+gem 'rubyzip', '~> 2.0.0', require: 'zip'
 # GitLab Pages letsencrypt support
 gem 'acme-client', '~> 2.0.2'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 0bf630b42ef..d4dd0a37570 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -262,7 +262,7 @@ GEM
     et-orbi (1.2.1)
       tzinfo
     eventmachine (1.2.7)
-    excon (0.62.0)
+    excon (0.71.1)
     execjs (2.6.0)
     expression_parser (0.9.0)
     extended-markdown-filter (0.6.0)
@@ -944,7 +944,7 @@ GEM
       sexp_processor (~> 4.9)
     rubyntlm (0.6.2)
     rubypants (0.2.0)
-    rubyzip (1.3.0)
+    rubyzip (2.0.0)
     rugged (0.28.4.1)
     safe_yaml (1.0.4)
     sanitize (4.6.6)
@@ -1343,7 +1343,7 @@ DEPENDENCIES
   ruby-prof (~> 1.0.0)
   ruby-progressbar
   ruby_parser (~> 3.8)
-  rubyzip (~> 1.3.0)
+  rubyzip (~> 2.0.0)
   rugged (~> 0.28)
   sanitize (~> 4.6)
   sassc-rails (~> 2.1.0)
diff --git a/app/assets/javascripts/groups_select.js b/app/assets/javascripts/groups_select.js
index a5e38022b8d..4daa8c60e58 100644
--- a/app/assets/javascripts/groups_select.js
+++ b/app/assets/javascripts/groups_select.js
@@ -1,6 +1,7 @@
 import $ from 'jquery';
 import axios from './lib/utils/axios_utils';
 import Api from './api';
+import { escape } from 'lodash';
 import { normalizeHeaders } from './lib/utils/common_utils';
 import { __ } from '~/locale';
 
@@ -75,10 +76,12 @@ const groupsSelect = () => {
         }
       },
       formatResult(object) {
-        return `<div class='group-result'> <div class='group-name'>${object.full_name}</div> <div class='group-path'>${object.full_path}</div> </div>`;
+        return `<div class='group-result'> <div class='group-name'>${escape(
+          object.full_name,
+        )}</div> <div class='group-path'>${object.full_path}</div> </div>`;
       },
       formatSelection(object) {
-        return object.full_name;
+        return escape(object.full_name);
       },
       dropdownCssClass: 'ajax-groups-dropdown select2-infinite',
       // we do not want to escape markup since we are displaying html in results
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 60b5d9b6da8..acbc25220a0 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -5,6 +5,7 @@ require 'fogbugz'
 
 class ApplicationController < ActionController::Base
   include Gitlab::GonHelper
+  include Gitlab::NoCacheHeaders
   include GitlabRoutingHelper
   include PageLayoutHelper
   include SafeParamsHelper
@@ -55,7 +56,6 @@ class ApplicationController < ActionController::Base
   # Adds `no-store` to the DEFAULT_CACHE_CONTROL, to prevent security
   # concerns due to caching private data.
   DEFAULT_GITLAB_CACHE_CONTROL = "#{ActionDispatch::Http::Cache::Response::DEFAULT_CACHE_CONTROL}, no-store"
-  DEFAULT_GITLAB_CONTROL_NO_CACHE = "#{DEFAULT_GITLAB_CACHE_CONTROL}, no-cache"
 
   rescue_from Encoding::CompatibilityError do |exception|
     log_exception(exception)
@@ -247,9 +247,9 @@ class ApplicationController < ActionController::Base
   end
 
   def no_cache_headers
-    headers['Cache-Control'] = DEFAULT_GITLAB_CONTROL_NO_CACHE
-    headers['Pragma'] = 'no-cache' # HTTP 1.0 compatibility
-    headers['Expires'] = 'Fri, 01 Jan 1990 00:00:00 GMT'
+    DEFAULT_GITLAB_NO_CACHE_HEADERS.each do |k, v|
+      headers[k] = v
+    end
   end
 
   def default_headers
diff --git a/app/graphql/types/grafana_integration_type.rb b/app/graphql/types/grafana_integration_type.rb
index e6c865fea53..f234008ee0d 100644
--- a/app/graphql/types/grafana_integration_type.rb
+++ b/app/graphql/types/grafana_integration_type.rb
@@ -10,14 +10,19 @@ module Types
       description: 'Internal ID of the Grafana integration'
     field :grafana_url, GraphQL::STRING_TYPE, null: false,
       description: 'Url for the Grafana host for the Grafana integration'
-    field :token, GraphQL::STRING_TYPE, null: false,
-      description: 'API token for the Grafana integration'
     field :enabled, GraphQL::BOOLEAN_TYPE, null: false,
       description: 'Indicates whether Grafana integration is enabled'
-
     field :created_at, Types::TimeType, null: false,
           description: 'Timestamp of the issue\'s creation'
     field :updated_at, Types::TimeType, null: false,
           description: 'Timestamp of the issue\'s last activity'
+
+    field :token, GraphQL::STRING_TYPE, null: false,
+          deprecation_reason: 'Plain text token has been masked for security reasons',
+          description: 'API token for the Grafana integration. Field is permanently masked.'
+
+    def token
+      object.masked_token
+    end
   end
 end
diff --git a/app/helpers/projects_helper.rb b/app/helpers/projects_helper.rb
index 63f1f24b611..e2173140a08 100644
--- a/app/helpers/projects_helper.rb
+++ b/app/helpers/projects_helper.rb
@@ -368,8 +368,8 @@ module ProjectsHelper
     @project.grafana_integration&.grafana_url
   end
 
-  def grafana_integration_token
-    @project.grafana_integration&.token
+  def grafana_integration_masked_token
+    @project.grafana_integration&.masked_token
   end
 
   def grafana_integration_enabled?
diff --git a/app/models/grafana_integration.rb b/app/models/grafana_integration.rb
index ed4c279965a..00213732fee 100644
--- a/app/models/grafana_integration.rb
+++ b/app/models/grafana_integration.rb
@@ -8,11 +8,13 @@ class GrafanaIntegration < ApplicationRecord
     algorithm: 'aes-256-gcm',
     key:       Settings.attr_encrypted_db_key_base_32
 
+  before_validation :check_token_changes
+
   validates :grafana_url,
             length: { maximum: 1024 },
             addressable_url: { enforce_sanitization: true, ascii_only: true }
 
-  validates :token, :project, presence: true
+  validates :encrypted_token, :project, presence: true
 
   validates :enabled, inclusion: { in: [true, false] }
 
@@ -23,4 +25,28 @@ class GrafanaIntegration < ApplicationRecord
 
     @client ||= ::Grafana::Client.new(api_url: grafana_url.chomp('/'), token: token)
   end
+
+  def masked_token
+    mask(encrypted_token)
+  end
+
+  def masked_token_was
+    mask(encrypted_token_was)
+  end
+
+  private
+
+  def token
+    decrypt(:token, encrypted_token)
+  end
+
+  def check_token_changes
+    return unless [encrypted_token_was, masked_token_was].include?(token)
+
+    clear_attribute_changes [:token, :encrypted_token, :encrypted_token_iv]
+  end
+
+  def mask(token)
+    token&.squish&.gsub(/./, '*')
+  end
 end
diff --git a/app/models/note.rb b/app/models/note.rb
index 7731b477ad0..11237a5049d 100644
--- a/app/models/note.rb
+++ b/app/models/note.rb
@@ -545,7 +545,8 @@ class Note < ApplicationRecord
       # if they are not equal, then there are private/confidential references as well
       user_visible_reference_count > 0 && user_visible_reference_count == total_reference_count
     else
-      referenced_mentionables(user).any?
+      refs = all_references(user)
+      refs.all.any? && refs.stateful_not_visible_counter == 0
     end
   end
 
diff --git a/app/models/project.rb b/app/models/project.rb
index c48360290c7..b2f20731c65 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -2341,6 +2341,10 @@ class Project < ApplicationRecord
     end
   end
 
+  def template_source?
+    false
+  end
+
   private
 
   def closest_namespace_setting(name)
diff --git a/app/services/projects/import_export/export_service.rb b/app/services/projects/import_export/export_service.rb
index 8344397f67d..38859c1efa4 100644
--- a/app/services/projects/import_export/export_service.rb
+++ b/app/services/projects/import_export/export_service.rb
@@ -4,6 +4,12 @@ module Projects
   module ImportExport
     class ExportService < BaseService
       def execute(after_export_strategy = nil, options = {})
+        unless project.template_source? || can?(current_user, :admin_project, project)
+          raise ::Gitlab::ImportExport::Error.new(
+            "User with ID: %s does not have permission to Project %s with ID: %s." %
+              [current_user.id, project.name, project.id])
+        end
+
         @shared = project.import_export_shared
 
         save_all!
diff --git a/app/views/projects/settings/operations/_grafana_integration.html.haml b/app/views/projects/settings/operations/_grafana_integration.html.haml
index cd5b5abd9ce..69e42a6c4fb 100644
--- a/app/views/projects/settings/operations/_grafana_integration.html.haml
+++ b/app/views/projects/settings/operations/_grafana_integration.html.haml
@@ -1,2 +1,2 @@
 .js-grafana-integration{ data: { operations_settings_endpoint: project_settings_operations_path(@project),
-  grafana_integration: { url: grafana_integration_url, token: grafana_integration_token, enabled: grafana_integration_enabled?.to_s } } }
+  grafana_integration: { url: grafana_integration_url, token: grafana_integration_masked_token, enabled: grafana_integration_enabled?.to_s } } }
diff --git a/changelogs/unreleased/security-13-update-ruby-zip-pages-master.yml b/changelogs/unreleased/security-13-update-ruby-zip-pages-master.yml
new file mode 100644
index 00000000000..976ce6f90b3
--- /dev/null
+++ b/changelogs/unreleased/security-13-update-ruby-zip-pages-master.yml
@@ -0,0 +1,5 @@
+---
+title: Bump rubyzip to 2.0.0
+merge_request:
+author: Utkarsh Gupta
+type: security
diff --git a/changelogs/unreleased/security-dependency-proxy-path-traversal.yml b/changelogs/unreleased/security-dependency-proxy-path-traversal.yml
new file mode 100644
index 00000000000..ca0a03e36ab
--- /dev/null
+++ b/changelogs/unreleased/security-dependency-proxy-path-traversal.yml
@@ -0,0 +1,5 @@
+---
+title: Add constraint to group dependency proxy endpoint param
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-dos-via-asciidoc-includes.yml b/changelogs/unreleased/security-dos-via-asciidoc-includes.yml
new file mode 100644
index 00000000000..8fc3bd32316
--- /dev/null
+++ b/changelogs/unreleased/security-dos-via-asciidoc-includes.yml
@@ -0,0 +1,5 @@
+---
+title: Limit number of AsciiDoc includes per document
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-fix-grafana-token-leaked-in-plain-to-other-maintainers.yml b/changelogs/unreleased/security-fix-grafana-token-leaked-in-plain-to-other-maintainers.yml
new file mode 100644
index 00000000000..0b8de350393
--- /dev/null
+++ b/changelogs/unreleased/security-fix-grafana-token-leaked-in-plain-to-other-maintainers.yml
@@ -0,0 +1,5 @@
+---
+title: Prevent gafana integration token from being displayed as a plain text to other project maintainers, by only displaying a masked version of it. GraphQL api deprecate token field in GrafanaIntegration type.
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-fix-xss-on-project-templates.yml b/changelogs/unreleased/security-fix-xss-on-project-templates.yml
new file mode 100644
index 00000000000..2930bbaff87
--- /dev/null
+++ b/changelogs/unreleased/security-fix-xss-on-project-templates.yml
@@ -0,0 +1,5 @@
+---
+title: Fix XSS vulnerability on custom project templates form
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-project_export_service_permission_check.yml b/changelogs/unreleased/security-project_export_service_permission_check.yml
new file mode 100644
index 00000000000..a38aaabfc9b
--- /dev/null
+++ b/changelogs/unreleased/security-project_export_service_permission_check.yml
@@ -0,0 +1,5 @@
+---
+title: ImportExport::ExportService to require admin_project permission
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-reference-check.yml b/changelogs/unreleased/security-reference-check.yml
new file mode 100644
index 00000000000..f33cea66eb1
--- /dev/null
+++ b/changelogs/unreleased/security-reference-check.yml
@@ -0,0 +1,5 @@
+---
+title: Make sure that only system notes where all references are visible to user are exposed in GraphQL API.
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-remove-caching-from-api-project-raw-endpoint.yml b/changelogs/unreleased/security-remove-caching-from-api-project-raw-endpoint.yml
new file mode 100644
index 00000000000..308a618da89
--- /dev/null
+++ b/changelogs/unreleased/security-remove-caching-from-api-project-raw-endpoint.yml
@@ -0,0 +1,5 @@
+---
+title: Disable caching of repository/files/:file_path/raw API endpoint
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-update-excon-cve-2019-16779.yml b/changelogs/unreleased/security-update-excon-cve-2019-16779.yml
new file mode 100644
index 00000000000..e849dc92848
--- /dev/null
+++ b/changelogs/unreleased/security-update-excon-cve-2019-16779.yml
@@ -0,0 +1,5 @@
+---
+title: Update excon to 0.71.1 to fix CVE-2019-16779
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-workhorse-package-bypass.yml b/changelogs/unreleased/security-workhorse-package-bypass.yml
new file mode 100644
index 00000000000..bb9aa0a2bf1
--- /dev/null
+++ b/changelogs/unreleased/security-workhorse-package-bypass.yml
@@ -0,0 +1,5 @@
+---
+title: Add workhorse request verification to package upload endpoints
+merge_request:
+author:
+type: security
diff --git a/doc/api/graphql/reference/gitlab_schema.graphql b/doc/api/graphql/reference/gitlab_schema.graphql
index 23ffae3b097..0884f8948f0 100644
--- a/doc/api/graphql/reference/gitlab_schema.graphql
+++ b/doc/api/graphql/reference/gitlab_schema.graphql
@@ -2414,9 +2414,9 @@ type GrafanaIntegration {
   id: ID!
 
   """
-  API token for the Grafana integration
+  API token for the Grafana integration. Field is permanently masked.
   """
-  token: String!
+  token: String! @deprecated(reason: "Plain text token has been masked for security reasons")
 
   """
   Timestamp of the issue's last activity
diff --git a/doc/api/graphql/reference/gitlab_schema.json b/doc/api/graphql/reference/gitlab_schema.json
index 6239a398c7e..b1617edbfbb 100644
--- a/doc/api/graphql/reference/gitlab_schema.json
+++ b/doc/api/graphql/reference/gitlab_schema.json
@@ -16249,7 +16249,7 @@
             },
             {
               "name": "token",
-              "description": "API token for the Grafana integration",
+              "description": "API token for the Grafana integration. Field is permanently masked.",
               "args": [
 
               ],
@@ -16262,8 +16262,8 @@
                   "ofType": null
                 }
               },
-              "isDeprecated": false,
-              "deprecationReason": null
+              "isDeprecated": true,
+              "deprecationReason": "Plain text token has been masked for security reasons"
             },
             {
               "name": "updatedAt",
diff --git a/doc/api/graphql/reference/index.md b/doc/api/graphql/reference/index.md
index 72fc82444ca..5adc68209b0 100644
--- a/doc/api/graphql/reference/index.md
+++ b/doc/api/graphql/reference/index.md
@@ -370,10 +370,10 @@ Autogenerated return type of EpicTreeReorder
 | ---   |  ---- | ----------  |
 | `id` | ID! | Internal ID of the Grafana integration |
 | `grafanaUrl` | String! | Url for the Grafana host for the Grafana integration |
-| `token` | String! | API token for the Grafana integration |
 | `enabled` | Boolean! | Indicates whether Grafana integration is enabled |
 | `createdAt` | Time! | Timestamp of the issue's creation |
 | `updatedAt` | Time! | Timestamp of the issue's last activity |
+| `token` | String! | API token for the Grafana integration. Field is permanently masked. |
 
 ## Group
 
diff --git a/doc/user/asciidoc.md b/doc/user/asciidoc.md
index b4d3cb58e97..da6bf287955 100644
--- a/doc/user/asciidoc.md
+++ b/doc/user/asciidoc.md
@@ -221,6 +221,11 @@ include::basics.adoc[]
 include::https://example.org/installation.adoc[]
 ```
 
+To guarantee good system performance and prevent malicious documents causing
+problems, GitLab enforces a **maximum limit** on the number of include directives
+processed in any one document. Currently a total of 32 documents can be
+included, a number that is inclusive of transitive dependencies.
+
 ### Blocks
 
 ```asciidoc
diff --git a/lib/api/files.rb b/lib/api/files.rb
index 0b438fb5bbc..feed22d188c 100644
--- a/lib/api/files.rb
+++ b/lib/api/files.rb
@@ -127,6 +127,7 @@ module API
       get ":id/repository/files/:file_path/raw", requirements: FILE_ENDPOINT_REQUIREMENTS do
         assign_file_vars!
 
+        no_cache_headers
         set_http_headers(blob_data)
 
         send_git_blob @repo, @blob
diff --git a/lib/api/helpers.rb b/lib/api/helpers.rb
index b2f5def4048..7d9a91cd360 100644
--- a/lib/api/helpers.rb
+++ b/lib/api/helpers.rb
@@ -258,11 +258,21 @@ module API
     end
 
     def require_gitlab_workhorse!
+      verify_workhorse_api!
+
       unless env['HTTP_GITLAB_WORKHORSE'].present?
         forbidden!('Request should be executed via GitLab Workhorse')
       end
     end
 
+    def verify_workhorse_api!
+      Gitlab::Workhorse.verify_api_request!(request.headers)
+    rescue => e
+      Gitlab::ErrorTracking.track_exception(e)
+
+      forbidden!
+    end
+
     def require_pages_enabled!
       not_found! unless user_project.pages_available?
     end
diff --git a/lib/api/helpers/headers_helpers.rb b/lib/api/helpers/headers_helpers.rb
index 7553af9d156..908c57bb04e 100644
--- a/lib/api/helpers/headers_helpers.rb
+++ b/lib/api/helpers/headers_helpers.rb
@@ -3,6 +3,8 @@
 module API
   module Helpers
     module HeadersHelpers
+      include Gitlab::NoCacheHeaders
+
       def set_http_headers(header_data)
         header_data.each do |key, value|
           if value.is_a?(Enumerable)
@@ -12,6 +14,12 @@ module API
           header "X-Gitlab-#{key.to_s.split('_').collect(&:capitalize).join('-')}", value.to_s
         end
       end
+
+      def no_cache_headers
+        DEFAULT_GITLAB_NO_CACHE_HEADERS.each do |k, v|
+          header k, v
+        end
+      end
     end
   end
 end
diff --git a/lib/banzai/reference_parser/base_parser.rb b/lib/banzai/reference_parser/base_parser.rb
index 9160c0e14cf..9ecbc3ecec2 100644
--- a/lib/banzai/reference_parser/base_parser.rb
+++ b/lib/banzai/reference_parser/base_parser.rb
@@ -201,12 +201,14 @@ module Banzai
         gather_references(nodes)
       end
 
-      # Gathers the references for the given HTML nodes.
+      # Gathers the references for the given HTML nodes.  Returns visible
+      # references and a list of nodes which are not visible to the user
       def gather_references(nodes)
         nodes = nodes_user_can_reference(current_user, nodes)
-        nodes = nodes_visible_to_user(current_user, nodes)
+        visible = nodes_visible_to_user(current_user, nodes)
+        not_visible = nodes - visible
 
-        referenced_by(nodes)
+        { visible: referenced_by(visible), not_visible: not_visible }
       end
 
       # Returns a Hash containing the projects for a given list of HTML nodes.
diff --git a/lib/gitlab/asciidoc.rb b/lib/gitlab/asciidoc.rb
index da65caa6c9c..8d072422e17 100644
--- a/lib/gitlab/asciidoc.rb
+++ b/lib/gitlab/asciidoc.rb
@@ -11,6 +11,7 @@ module Gitlab
   # the resulting HTML through HTML pipeline filters.
   module Asciidoc
     MAX_INCLUDE_DEPTH = 5
+    MAX_INCLUDES = 32
     DEFAULT_ADOC_ATTRS = {
         'showtitle' => true,
         'sectanchors' => true,
@@ -40,6 +41,7 @@ module Gitlab
                         extensions: extensions }
 
       context[:pipeline] = :ascii_doc
+      context[:max_includes] = [MAX_INCLUDES, context[:max_includes]].compact.min
 
       plantuml_setup
 
diff --git a/lib/gitlab/asciidoc/include_processor.rb b/lib/gitlab/asciidoc/include_processor.rb
index 6e0b7ce60ba..53d1135a2d7 100644
--- a/lib/gitlab/asciidoc/include_processor.rb
+++ b/lib/gitlab/asciidoc/include_processor.rb
@@ -14,6 +14,8 @@ module Gitlab
 
         @context = context
         @repository = context[:repository] || context[:project].try(:repository)
+        @max_includes = context[:max_includes].to_i
+        @included = []
 
         # Note: Asciidoctor calls #freeze on extensions, so we can't set new
         # instance variables after initialization.
@@ -28,8 +30,11 @@ module Gitlab
       def include_allowed?(target, reader)
         doc = reader.document
 
-        return false if doc.attributes.fetch('max-include-depth').to_i < 1
+        max_include_depth = doc.attributes.fetch('max-include-depth').to_i
+
+        return false if max_include_depth < 1
         return false if target_uri?(target)
+        return false if included.size >= max_includes
 
         true
       end
@@ -62,7 +67,7 @@ module Gitlab
 
       private
 
-      attr_accessor :context, :repository, :cache
+      attr_reader :context, :repository, :cache, :max_includes, :included
 
       # Gets a Blob at a path for a specific revision.
       # This method will check that the Blob exists and contains readable text.
@@ -77,6 +82,8 @@ module Gitlab
         raise 'Blob not found' unless blob
         raise 'File is not readable' unless blob.readable_text?
 
+        included << filename
+
         blob
       end
 
diff --git a/lib/gitlab/no_cache_headers.rb b/lib/gitlab/no_cache_headers.rb
new file mode 100644
index 00000000000..f80ca2c1369
--- /dev/null
+++ b/lib/gitlab/no_cache_headers.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module NoCacheHeaders
+    DEFAULT_GITLAB_NO_CACHE_HEADERS = {
+      'Cache-Control' => "#{ActionDispatch::Http::Cache::Response::DEFAULT_CACHE_CONTROL}, no-store, no-cache",
+      'Pragma'        => 'no-cache', # HTTP 1.0 compatibility
+      'Expires'       => 'Fri, 01 Jan 1990 00:00:00 GMT'
+    }.freeze
+
+    def no_cache_headers
+      raise "#no_cache_headers is not implemented for this object"
+    end
+  end
+end
diff --git a/lib/gitlab/reference_extractor.rb b/lib/gitlab/reference_extractor.rb
index f095ac9ffd1..519eb49658a 100644
--- a/lib/gitlab/reference_extractor.rb
+++ b/lib/gitlab/reference_extractor.rb
@@ -6,11 +6,16 @@ module Gitlab
     REFERABLES = %i(user issue label milestone mentioned_user mentioned_group mentioned_project
                     merge_request snippet commit commit_range directly_addressed_user epic).freeze
     attr_accessor :project, :current_user, :author
+    # This counter is increased by a number of references filtered out by
+    # banzai reference exctractor. Note that this counter is stateful and
+    # not idempotent and is increased whenever you call `references`.
+    attr_reader :stateful_not_visible_counter
 
     def initialize(project, current_user = nil)
       @project = project
       @current_user = current_user
       @references = {}
+      @stateful_not_visible_counter = 0
 
       super()
     end
@@ -20,11 +25,15 @@ module Gitlab
     end
 
     def references(type)
-      super(type, project, current_user)
+      refs = super(type, project, current_user)
+      @stateful_not_visible_counter += refs[:not_visible].count
+
+      refs[:visible]
     end
 
     def reset_memoized_values
       @references = {}
+      @stateful_not_visible_counter = 0
       super()
     end
 
diff --git a/package.json b/package.json
index df3c28ada2a..22908519da4 100644
--- a/package.json
+++ b/package.json
@@ -94,6 +94,7 @@
     "jszip": "^3.1.3",
     "jszip-utils": "^0.0.2",
     "katex": "^0.10.0",
+    "lodash": "^4.17.15",
     "marked": "^0.3.12",
     "mermaid": "^8.4.5",
     "monaco-editor": "^0.18.1",
diff --git a/qa/qa/specs/features/api/3_create/repository/files_spec.rb b/qa/qa/specs/features/api/3_create/repository/files_spec.rb
index f6f020da472..dc471128dae 100644
--- a/qa/qa/specs/features/api/3_create/repository/files_spec.rb
+++ b/qa/qa/specs/features/api/3_create/repository/files_spec.rb
@@ -59,5 +59,48 @@ module QA
         a_hash_including(message: '202 Accepted')
       )
     end
+
+    describe 'raw file access' do
+      let(:svg_file) do
+        <<-SVG
+          <?xml version="1.0" standalone="no"?>
+          <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+
+          <svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
+            <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>
+            <script type="text/javascript">
+               alert("surprise");
+            </script>
+          </svg>
+        SVG
+      end
+
+      it 'sets no-cache headers as expected' do
+        create_project_request = Runtime::API::Request.new(@api_client, '/projects')
+        post create_project_request.url, path: project_name, name: project_name
+
+        create_file_request = Runtime::API::Request.new(@api_client, "/projects/#{sanitized_project_path}/repository/files/test.svg")
+        post create_file_request.url, branch: 'master', content: svg_file, commit_message: 'Add test.svg'
+
+        get_file_request = Runtime::API::Request.new(@api_client, "/projects/#{sanitized_project_path}/repository/files/test.svg/raw", ref: 'master')
+
+        3.times do
+          response = get get_file_request.url
+
+          # Subsequent responses aren't cached, so headers should match from
+          #   request to request, especially a 200 response rather than a 304
+          #   (indicating a cached response.) Further, :content_disposition
+          #   should include `attachment` for all responses.
+          #
+          expect(response.headers[:cache_control]).to include("no-store")
+          expect(response.headers[:cache_control]).to include("no-cache")
+          expect(response.headers[:pragma]).to eq("no-cache")
+          expect(response.headers[:expires]).to eq("Fri, 01 Jan 1990 00:00:00 GMT")
+          expect(response.headers[:content_disposition]).to include("attachment")
+          expect(response.headers[:content_disposition]).not_to include("inline")
+          expect(response.headers[:content_type]).to include("image/svg+xml")
+        end
+      end
+    end
   end
 end
diff --git a/spec/helpers/projects_helper_spec.rb b/spec/helpers/projects_helper_spec.rb
index c7e454771bb..7fc568bb960 100644
--- a/spec/helpers/projects_helper_spec.rb
+++ b/spec/helpers/projects_helper_spec.rb
@@ -935,14 +935,14 @@ describe ProjectsHelper do
       helper.instance_variable_set(:@project, project)
     end
 
-    subject { helper.grafana_integration_token }
+    subject { helper.grafana_integration_masked_token }
 
     it { is_expected.to eq(nil) }
 
     context 'grafana integration exists' do
       let!(:grafana_integration) { create(:grafana_integration, project: project) }
 
-      it { is_expected.to eq(grafana_integration.token) }
+      it { is_expected.to eq(grafana_integration.masked_token) }
     end
   end
 
diff --git a/spec/lib/banzai/reference_parser/mentioned_group_parser_spec.rb b/spec/lib/banzai/reference_parser/mentioned_group_parser_spec.rb
index 30b99f3eda7..8346ba93f88 100644
--- a/spec/lib/banzai/reference_parser/mentioned_group_parser_spec.rb
+++ b/spec/lib/banzai/reference_parser/mentioned_group_parser_spec.rb
@@ -19,7 +19,7 @@ describe Banzai::ReferenceParser::MentionedGroupParser do
         it 'returns empty array' do
           link['data-group'] = project.group.id.to_s
 
-          expect(subject.gather_references([link])).to eq([])
+          expect_gathered_references(subject.gather_references([link]), [], 1)
         end
       end
 
@@ -30,7 +30,7 @@ describe Banzai::ReferenceParser::MentionedGroupParser do
         end
 
         it 'returns groups' do
-          expect(subject.gather_references([link])).to eq([group])
+          expect_gathered_references(subject.gather_references([link]), [group], 0)
         end
       end
 
@@ -38,7 +38,7 @@ describe Banzai::ReferenceParser::MentionedGroupParser do
         it 'returns an empty Array' do
           link['data-group'] = 'test-non-existing'
 
-          expect(subject.gather_references([link])).to eq([])
+          expect_gathered_references(subject.gather_references([link]), [], 1)
         end
       end
     end
diff --git a/spec/lib/banzai/reference_parser/mentioned_project_parser_spec.rb b/spec/lib/banzai/reference_parser/mentioned_project_parser_spec.rb
index 154f7c4dc36..b99c02351d0 100644
--- a/spec/lib/banzai/reference_parser/mentioned_project_parser_spec.rb
+++ b/spec/lib/banzai/reference_parser/mentioned_project_parser_spec.rb
@@ -19,7 +19,7 @@ describe Banzai::ReferenceParser::MentionedProjectParser do
         it 'returns empty Array' do
           link['data-project'] = project.id.to_s
 
-          expect(subject.gather_references([link])).to eq([])
+          expect_gathered_references(subject.gather_references([link]), [], 1)
         end
       end
 
@@ -30,7 +30,7 @@ describe Banzai::ReferenceParser::MentionedProjectParser do
         end
 
         it 'returns an Array of referenced projects' do
-          expect(subject.gather_references([link])).to eq([project])
+          expect_gathered_references(subject.gather_references([link]), [project], 0)
         end
       end
 
@@ -38,7 +38,7 @@ describe Banzai::ReferenceParser::MentionedProjectParser do
         it 'returns an empty Array' do
           link['data-project'] = 'inexisting-project-id'
 
-          expect(subject.gather_references([link])).to eq([])
+          expect_gathered_references(subject.gather_references([link]), [], 1)
         end
       end
     end
diff --git a/spec/lib/banzai/reference_parser/mentioned_user_parser_spec.rb b/spec/lib/banzai/reference_parser/mentioned_user_parser_spec.rb
index 1be279375bd..b10e5d19828 100644
--- a/spec/lib/banzai/reference_parser/mentioned_user_parser_spec.rb
+++ b/spec/lib/banzai/reference_parser/mentioned_user_parser_spec.rb
@@ -22,7 +22,7 @@ describe Banzai::ReferenceParser::MentionedUserParser do
         end
 
         it 'returns empty list of users' do
-          expect(subject.gather_references([link])).to eq([])
+          expect_gathered_references(subject.gather_references([link]), [], 0)
         end
       end
     end
@@ -35,7 +35,7 @@ describe Banzai::ReferenceParser::MentionedUserParser do
         end
 
         it 'returns empty list of users' do
-          expect(subject.gather_references([link])).to eq([])
+          expect_gathered_references(subject.gather_references([link]), [], 0)
         end
       end
     end
@@ -44,7 +44,7 @@ describe Banzai::ReferenceParser::MentionedUserParser do
       it 'returns an Array of users' do
         link['data-user'] = user.id.to_s
 
-        expect(subject.referenced_by([link])).to eq([user])
+        expect_gathered_references(subject.gather_references([link]), [user], 0)
       end
     end
   end
diff --git a/spec/lib/banzai/reference_parser/project_parser_spec.rb b/spec/lib/banzai/reference_parser/project_parser_spec.rb
index 356dde1e9c2..e87fa3e8767 100644
--- a/spec/lib/banzai/reference_parser/project_parser_spec.rb
+++ b/spec/lib/banzai/reference_parser/project_parser_spec.rb
@@ -17,7 +17,7 @@ describe Banzai::ReferenceParser::ProjectParser do
         it 'returns an Array of projects' do
           link['data-project'] = project.id.to_s
 
-          expect(subject.gather_references([link])).to eq([project])
+          expect_gathered_references(subject.gather_references([link]), [project], 0)
         end
       end
 
@@ -25,7 +25,7 @@ describe Banzai::ReferenceParser::ProjectParser do
         it 'returns an empty Array' do
           link['data-project'] = ''
 
-          expect(subject.gather_references([link])).to eq([])
+          expect_gathered_references(subject.gather_references([link]), [], 1)
         end
       end
 
@@ -35,7 +35,7 @@ describe Banzai::ReferenceParser::ProjectParser do
 
           link['data-project'] = private_project.id.to_s
 
-          expect(subject.gather_references([link])).to eq([])
+          expect_gathered_references(subject.gather_references([link]), [], 1)
         end
 
         it 'returns an Array when authorized' do
@@ -43,7 +43,7 @@ describe Banzai::ReferenceParser::ProjectParser do
 
           link['data-project'] = private_project.id.to_s
 
-          expect(subject.gather_references([link])).to eq([private_project])
+          expect_gathered_references(subject.gather_references([link]), [private_project], 0)
         end
       end
     end
diff --git a/spec/lib/gitlab/asciidoc/include_processor_spec.rb b/spec/lib/gitlab/asciidoc/include_processor_spec.rb
new file mode 100644
index 00000000000..5fec4d9e208
--- /dev/null
+++ b/spec/lib/gitlab/asciidoc/include_processor_spec.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'nokogiri'
+
+describe Gitlab::Asciidoc::IncludeProcessor do
+  let_it_be(:project) { create(:project, :repository) }
+
+  let(:processor_context) do
+    {
+      project: project,
+      max_includes: max_includes,
+      ref: ref
+    }
+  end
+  let(:ref) { project.repository.root_ref }
+  let(:max_includes) { 10 }
+
+  let(:reader) { Asciidoctor::PreprocessorReader.new(document, lines, 'file.adoc') }
+  let(:document) { Asciidoctor::Document.new(lines) }
+
+  subject(:processor) { described_class.new(processor_context) }
+
+  let(:a_blob) { double(:Blob, readable_text?: true, data: a_data) }
+  let(:a_data) { StringIO.new('include::b.adoc[]') }
+
+  let(:lines) { [':max-include-depth: 1000'] + Array.new(10, 'include::a.adoc[]') }
+
+  before do
+    allow(project.repository).to receive(:blob_at).with(ref, 'a.adoc').and_return(a_blob)
+  end
+
+  describe '#include_allowed?' do
+    it 'allows the first include' do
+      expect(processor.send(:include_allowed?, 'foo.adoc', reader)).to be_truthy
+    end
+
+    it 'disallows the Nth + 1 include' do
+      max_includes.times { processor.send(:read_blob, ref, 'a.adoc') }
+
+      expect(processor.send(:include_allowed?, 'foo.adoc', reader)).to be_falsey
+    end
+  end
+end
diff --git a/spec/lib/gitlab/asciidoc_spec.rb b/spec/lib/gitlab/asciidoc_spec.rb
index c8d159d1e84..c7156a500d0 100644
--- a/spec/lib/gitlab/asciidoc_spec.rb
+++ b/spec/lib/gitlab/asciidoc_spec.rb
@@ -425,6 +425,24 @@ module Gitlab
           create_file(current_file, "= AsciiDoc\n")
         end
 
+        def many_includes(target)
+          Array.new(10, "include::#{target}[]").join("\n")
+        end
+
+        context 'cyclic imports' do
+          before do
+            create_file('doc/api/a.adoc', many_includes('b.adoc'))
+            create_file('doc/api/b.adoc', many_includes('a.adoc'))
+          end
+
+          let(:include_path) { 'a.adoc' }
+          let(:requested_path) { 'doc/api/README.md' }
+
+          it 'completes successfully' do
+            is_expected.to include('<p>Include this:</p>')
+          end
+        end
+
         context 'with path to non-existing file' do
           let(:include_path) { 'not-exists.adoc' }
 
diff --git a/spec/lib/gitlab/no_cache_headers_spec.rb b/spec/lib/gitlab/no_cache_headers_spec.rb
new file mode 100644
index 00000000000..f011b55006e
--- /dev/null
+++ b/spec/lib/gitlab/no_cache_headers_spec.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::NoCacheHeaders do
+  class NoCacheTester
+    include Gitlab::NoCacheHeaders
+  end
+
+  describe "#no_cache_headers" do
+    subject { NoCacheTester.new }
+
+    it "raises a RuntimeError" do
+      expect { subject.no_cache_headers }.to raise_error(RuntimeError)
+    end
+  end
+end
diff --git a/spec/lib/gitlab/reference_extractor_spec.rb b/spec/lib/gitlab/reference_extractor_spec.rb
index 6bc9b6365d1..0faaaa50621 100644
--- a/spec/lib/gitlab/reference_extractor_spec.rb
+++ b/spec/lib/gitlab/reference_extractor_spec.rb
@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 describe Gitlab::ReferenceExtractor do
-  let(:project) { create(:project) }
+  let_it_be(:project) { create(:project) }
 
   before do
     project.add_developer(project.creator)
@@ -293,4 +293,34 @@ describe Gitlab::ReferenceExtractor do
       end
     end
   end
+
+  describe '#references' do
+    let_it_be(:user) { create(:user) }
+    let_it_be(:issue) { create(:issue, project: project) }
+    let(:text) { "Ref. #{issue.to_reference}" }
+
+    subject { described_class.new(project, user) }
+
+    before do
+      subject.analyze(text)
+    end
+
+    context 'when references are visible' do
+      before do
+        project.add_developer(user)
+      end
+
+      it 'returns visible references of given type' do
+        expect(subject.references(:issue)).to eq([issue])
+      end
+
+      it 'does not increase stateful_not_visible_counter' do
+        expect { subject.references(:issue) }.not_to change { subject.stateful_not_visible_counter }
+      end
+    end
+
+    it 'increases stateful_not_visible_counter' do
+      expect { subject.references(:issue) }.to change { subject.stateful_not_visible_counter }.by(1)
+    end
+  end
 end
diff --git a/spec/models/grafana_integration_spec.rb b/spec/models/grafana_integration_spec.rb
index 615865e17b9..662e8b1dd61 100644
--- a/spec/models/grafana_integration_spec.rb
+++ b/spec/models/grafana_integration_spec.rb
@@ -9,7 +9,7 @@ describe GrafanaIntegration do
 
   describe 'validations' do
     it { is_expected.to validate_presence_of(:project) }
-    it { is_expected.to validate_presence_of(:token) }
+    it { is_expected.to validate_presence_of(:encrypted_token) }
 
     it 'disallows invalid urls for grafana_url' do
       unsafe_url = %{https://replaceme.com/'><script>alert(document.cookie)</script>}
@@ -66,4 +66,24 @@ describe GrafanaIntegration do
       end
     end
   end
+
+  describe 'attribute encryption' do
+    subject(:grafana_integration) { create(:grafana_integration, token: 'super-secret') }
+
+    context 'token' do
+      it 'encrypts original value into encrypted_token attribute' do
+        expect(grafana_integration.encrypted_token).not_to be_nil
+      end
+
+      it 'locks access to raw value in private method', :aggregate_failures do
+        expect { grafana_integration.token }.to raise_error(NoMethodError, /private method .token. called/)
+        expect(grafana_integration.send(:token)).to eql('super-secret')
+      end
+
+      it 'prevents overriding token value with its encrypted or masked version', :aggregate_failures do
+        expect { grafana_integration.update(token: grafana_integration.encrypted_token) }.not_to change { grafana_integration.reload.send(:token) }
+        expect { grafana_integration.update(token: grafana_integration.masked_token) }.not_to change { grafana_integration.reload.send(:token) }
+      end
+    end
+  end
 end
diff --git a/spec/models/note_spec.rb b/spec/models/note_spec.rb
index a6d9ecaa7c5..2fa3f426da4 100644
--- a/spec/models/note_spec.rb
+++ b/spec/models/note_spec.rb
@@ -350,12 +350,12 @@ describe Note do
   end
 
   describe "cross_reference_not_visible_for?" do
-    let(:private_user)    { create(:user) }
-    let(:private_project) { create(:project, namespace: private_user.namespace) { |p| p.add_maintainer(private_user) } }
-    let(:private_issue)   { create(:issue, project: private_project) }
+    let_it_be(:private_user)    { create(:user) }
+    let_it_be(:private_project) { create(:project, namespace: private_user.namespace) { |p| p.add_maintainer(private_user) } }
+    let_it_be(:private_issue)   { create(:issue, project: private_project) }
 
-    let(:ext_proj)  { create(:project, :public) }
-    let(:ext_issue) { create(:issue, project: ext_proj) }
+    let_it_be(:ext_proj)  { create(:project, :public) }
+    let_it_be(:ext_issue) { create(:issue, project: ext_proj) }
 
     shared_examples "checks references" do
       it "returns true" do
@@ -393,10 +393,24 @@ describe Note do
       it_behaves_like "checks references"
     end
 
-    context "when there are two references in note" do
+    context "when there is a reference to a label" do
+      let_it_be(:private_label) { create(:label, project: private_project) }
       let(:note) do
         create :note,
           noteable: ext_issue, project: ext_proj,
+          note: "added label #{private_label.to_reference(ext_proj)}",
+          system: true
+      end
+      let!(:system_note_metadata) { create(:system_note_metadata, note: note, action: :label) }
+
+      it_behaves_like "checks references"
+    end
+
+    context "when there are two references in note" do
+      let_it_be(:ext_issue2) { create(:issue, project: ext_proj) }
+      let(:note) do
+        create :note,
+          noteable: ext_issue2, project: ext_proj,
           note: "mentioned in issue #{private_issue.to_reference(ext_proj)} and " \
                 "public issue #{ext_issue.to_reference(ext_proj)}",
           system: true
diff --git a/spec/requests/api/files_spec.rb b/spec/requests/api/files_spec.rb
index ab915af8ab0..efad443de3f 100644
--- a/spec/requests/api/files_spec.rb
+++ b/spec/requests/api/files_spec.rb
@@ -447,6 +447,18 @@ describe API::Files do
         expect(response).to have_gitlab_http_status(200)
       end
 
+      it 'sets no-cache headers' do
+        url = route('.gitignore') + "/raw"
+        expect(Gitlab::Workhorse).to receive(:send_git_blob)
+
+        get api(url, current_user), params: params
+
+        expect(response.headers["Cache-Control"]).to include("no-store")
+        expect(response.headers["Cache-Control"]).to include("no-cache")
+        expect(response.headers["Pragma"]).to eq("no-cache")
+        expect(response.headers["Expires"]).to eq("Fri, 01 Jan 1990 00:00:00 GMT")
+      end
+
       context 'when mandatory params are not given' do
         it_behaves_like '400 response' do
           let(:request) { get api(route("any%2Ffile"), current_user) }
diff --git a/spec/requests/api/graphql/project/grafana_integration_spec.rb b/spec/requests/api/graphql/project/grafana_integration_spec.rb
index 6075efb0cbd..e7155934b3a 100644
--- a/spec/requests/api/graphql/project/grafana_integration_spec.rb
+++ b/spec/requests/api/graphql/project/grafana_integration_spec.rb
@@ -45,7 +45,7 @@ describe 'Getting Grafana Integration' do
 
       it_behaves_like 'a working graphql query'
 
-      it { expect(integration_data['token']).to eql grafana_integration.token }
+      it { expect(integration_data['token']).to eql grafana_integration.masked_token }
       it { expect(integration_data['grafanaUrl']).to eql grafana_integration.grafana_url }
 
       it do
diff --git a/spec/requests/api/runner_spec.rb b/spec/requests/api/runner_spec.rb
index a313f75e3ec..e3ba366dfcc 100644
--- a/spec/requests/api/runner_spec.rb
+++ b/spec/requests/api/runner_spec.rb
@@ -1545,7 +1545,7 @@ describe API::Runner, :clean_gitlab_redis_shared_state do
 
           authorize_artifacts
 
-          expect(response).to have_gitlab_http_status(500)
+          expect(response).to have_gitlab_http_status(:forbidden)
         end
 
         context 'authorization token is invalid' do
@@ -1675,6 +1675,18 @@ describe API::Runner, :clean_gitlab_redis_shared_state do
             end
           end
 
+          context 'Is missing GitLab Workhorse token headers' do
+            let(:jwt_token) { JWT.encode({ 'iss' => 'invalid-header' }, Gitlab::Workhorse.secret, 'HS256') }
+
+            it 'fails to post artifacts without GitLab-Workhorse' do
+              expect(Gitlab::ErrorTracking).to receive(:track_exception).once
+
+              upload_artifacts(file_upload, headers_with_token)
+
+              expect(response).to have_gitlab_http_status(:forbidden)
+            end
+          end
+
           context 'when setting an expire date' do
             let(:default_artifacts_expire_in) {}
             let(:post_data) do
diff --git a/spec/services/projects/import_export/export_service_spec.rb b/spec/services/projects/import_export/export_service_spec.rb
index c7ac07fc524..906fef6edf5 100644
--- a/spec/services/projects/import_export/export_service_spec.rb
+++ b/spec/services/projects/import_export/export_service_spec.rb
@@ -10,6 +10,10 @@ describe Projects::ImportExport::ExportService do
     let(:service) { described_class.new(project, user) }
     let!(:after_export_strategy) { Gitlab::ImportExport::AfterExportStrategies::DownloadNotificationStrategy.new }
 
+    before do
+      project.add_maintainer(user)
+    end
+
     it 'saves the version' do
       expect(Gitlab::ImportExport::VersionSaver).to receive(:new).and_call_original
 
@@ -137,5 +141,18 @@ describe Projects::ImportExport::ExportService do
         expect(service).not_to receive(:execute_after_export_action)
       end
     end
+
+    context 'when user does not have admin_project permission' do
+      let!(:another_user) { create(:user) }
+
+      subject(:service) { described_class.new(project, another_user) }
+
+      it 'fails' do
+        expected_message =
+          "User with ID: %s does not have permission to Project %s with ID: %s." %
+            [another_user.id, project.name, project.id]
+        expect { service.execute }.to raise_error(Gitlab::ImportExport::Error).with_message(expected_message)
+      end
+    end
   end
 end
diff --git a/spec/services/projects/operations/update_service_spec.rb b/spec/services/projects/operations/update_service_spec.rb
index 93cd5c43e86..d20ec0b818b 100644
--- a/spec/services/projects/operations/update_service_spec.rb
+++ b/spec/services/projects/operations/update_service_spec.rb
@@ -210,7 +210,7 @@ describe Projects::Operations::UpdateService do
           integration = project.reload.grafana_integration
 
           expect(integration.grafana_url).to eq(expected_attrs[:grafana_url])
-          expect(integration.token).to eq(expected_attrs[:token])
+          expect(integration.send(:token)).to eq(expected_attrs[:token])
         end
       end
 
@@ -226,7 +226,7 @@ describe Projects::Operations::UpdateService do
           integration = project.reload.grafana_integration
 
           expect(integration.grafana_url).to eq(expected_attrs[:grafana_url])
-          expect(integration.token).to eq(expected_attrs[:token])
+          expect(integration.send(:token)).to eq(expected_attrs[:token])
         end
 
         context 'with all grafana attributes blank in params' do
diff --git a/spec/services/projects/update_pages_service_spec.rb b/spec/services/projects/update_pages_service_spec.rb
index 714256d9b08..52ec80c252b 100644
--- a/spec/services/projects/update_pages_service_spec.rb
+++ b/spec/services/projects/update_pages_service_spec.rb
@@ -5,7 +5,7 @@ require "spec_helper"
 describe Projects::UpdatePagesService do
   let_it_be(:project, refind: true) { create(:project, :repository) }
   let_it_be(:pipeline) { create(:ci_pipeline, project: project, sha: project.commit('HEAD').sha) }
-  let_it_be(:build) { create(:ci_build, pipeline: pipeline, ref: 'HEAD') }
+  let(:build) { create(:ci_build, pipeline: pipeline, ref: 'HEAD') }
   let(:invalid_file) { fixture_file_upload('spec/fixtures/dk.png') }
 
   let(:file) { fixture_file_upload("spec/fixtures/pages.zip") }
@@ -204,6 +204,32 @@ describe Projects::UpdatePagesService do
     end
   end
 
+  context 'when file size is spoofed' do
+    let(:metadata) { spy('metadata') }
+
+    include_context 'pages zip with spoofed size'
+
+    before do
+      file = fixture_file_upload(fake_zip_path, 'pages.zip')
+      metafile = fixture_file_upload('spec/fixtures/pages.zip.meta')
+
+      create(:ci_job_artifact, :archive, file: file, job: build)
+      create(:ci_job_artifact, :metadata, file: metafile, job: build)
+
+      allow(build).to receive(:artifacts_metadata_entry)
+                        .and_return(metadata)
+      allow(metadata).to receive(:total_size).and_return(100)
+    end
+
+    it 'raises an error' do
+      expect do
+        subject.execute
+      end.to raise_error(Projects::UpdatePagesService::FailedToExtractError,
+                         'Entry public/index.html should be 1B but is larger when inflated')
+      expect(deploy_status).to be_script_failure
+    end
+  end
+
   def deploy_status
     GenericCommitStatus.find_by(name: 'pages:deploy')
   end
diff --git a/spec/support/helpers/reference_parser_helpers.rb b/spec/support/helpers/reference_parser_helpers.rb
index f96a01d15b5..9084265b587 100644
--- a/spec/support/helpers/reference_parser_helpers.rb
+++ b/spec/support/helpers/reference_parser_helpers.rb
@@ -5,6 +5,11 @@ module ReferenceParserHelpers
     Nokogiri::HTML.fragment('<a></a>').children[0]
   end
 
+  def expect_gathered_references(result, visible, not_visible_count)
+    expect(result[:visible]).to eq(visible)
+    expect(result[:not_visible].count).to eq(not_visible_count)
+  end
+
   shared_examples 'no project N+1 queries' do
     it 'avoids N+1 queries in #nodes_visible_to_user', :request_store do
       context = Banzai::RenderContext.new(project, user)
diff --git a/spec/support/shared_contexts/pages_zip_with_spoofed_size_shared_context.rb b/spec/support/shared_contexts/pages_zip_with_spoofed_size_shared_context.rb
new file mode 100644
index 00000000000..4cec5ab3b74
--- /dev/null
+++ b/spec/support/shared_contexts/pages_zip_with_spoofed_size_shared_context.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+# the idea of creating zip archive with spoofed size is borrowed from
+# https://github.com/rubyzip/rubyzip/pull/403/files#diff-118213fb4baa6404a40f89e1147661ebR88
+RSpec.shared_context 'pages zip with spoofed size' do
+  let(:real_zip_path) { Tempfile.new(['real', '.zip']).path }
+  let(:fake_zip_path) { Tempfile.new(['fake', '.zip']).path }
+
+  before do
+    full_file_name = 'public/index.html'
+    true_size = 500_000
+    fake_size = 1
+
+    ::Zip::File.open(real_zip_path, ::Zip::File::CREATE) do |zf|
+      zf.get_output_stream(full_file_name) do |os|
+        os.write 'a' * true_size
+      end
+    end
+
+    compressed_size = nil
+    ::Zip::File.open(real_zip_path) do |zf|
+      a_entry = zf.find_entry(full_file_name)
+      compressed_size = a_entry.compressed_size
+    end
+
+    true_size_bytes = [compressed_size, true_size, full_file_name.size].pack('LLS')
+    fake_size_bytes = [compressed_size, fake_size, full_file_name.size].pack('LLS')
+
+    data = File.binread(real_zip_path)
+    data.gsub! true_size_bytes, fake_size_bytes
+
+    File.open(fake_zip_path, 'wb') do |file|
+      file.write data
+    end
+  end
+
+  after do
+    File.delete(real_zip_path) if File.exist?(real_zip_path)
+    File.delete(fake_zip_path) if File.exist?(fake_zip_path)
+  end
+end
diff --git a/vendor/gitignore/C++.gitignore b/vendor/gitignore/C++.gitignore
index 259148fa18f..259148fa18f 100755..100644
--- a/vendor/gitignore/C++.gitignore
+++ b/vendor/gitignore/C++.gitignore
diff --git a/vendor/gitignore/Java.gitignore b/vendor/gitignore/Java.gitignore
index a1c2a238a96..a1c2a238a96 100755..100644
--- a/vendor/gitignore/Java.gitignore
+++ b/vendor/gitignore/Java.gitignore