Add latest changes from gitlab-org/security/gitlab@13-2-stable-ee

38 files changed, 910 insertions, 162 deletions

diff --git a/app/channels/application_cable/connection.rb b/app/channels/application_cable/connection.rb
index 1361269f2a2..b2d98d243f9 100644
--- a/app/channels/application_cable/connection.rb
+++ b/app/channels/application_cable/connection.rb
@@ -15,7 +15,7 @@ module ApplicationCable
     private
 
     def find_user_from_session_store
-      session = ActiveSession.sessions_from_ids([session_id]).first
+      session = ActiveSession.sessions_from_ids([session_id.private_id]).first
       Warden::SessionSerializer.new('rack.session' => session).fetch(:user)
     end
 
diff --git a/app/controllers/profiles/active_sessions_controller.rb b/app/controllers/profiles/active_sessions_controller.rb
index d9ec3195fd1..e4cd5d65e1a 100644
--- a/app/controllers/profiles/active_sessions_controller.rb
+++ b/app/controllers/profiles/active_sessions_controller.rb
@@ -6,7 +6,9 @@ class Profiles::ActiveSessionsController < Profiles::ApplicationController
   end
 
   def destroy
-    ActiveSession.destroy_with_public_id(current_user, params[:id])
+    # params[:id] can be either an Rack::Session::SessionId#private_id
+    # or an encrypted Rack::Session::SessionId#public_id
+    ActiveSession.destroy_with_deprecated_encryption(current_user, params[:id])
     current_user.forget_me!
 
     respond_to do |format|
diff --git a/app/helpers/active_sessions_helper.rb b/app/helpers/active_sessions_helper.rb
index 8fb23f99cb3..2256bd006ea 100644
--- a/app/helpers/active_sessions_helper.rb
+++ b/app/helpers/active_sessions_helper.rb
@@ -22,4 +22,13 @@ module ActiveSessionsHelper
 
     sprite_icon(icon_name, size: 16, css_class: 'gl-mt-2')
   end
+
+  def revoke_session_path(active_session)
+    if active_session.session_private_id
+      profile_active_session_path(active_session.session_private_id)
+    else
+      # TODO: remove in 13.7
+      profile_active_session_path(active_session.public_id)
+    end
+  end
 end
diff --git a/app/models/active_session.rb b/app/models/active_session.rb
index 4908290e06b..dded0eb1dc3 100644
--- a/app/models/active_session.rb
+++ b/app/models/active_session.rb
@@ -9,14 +9,14 @@ class ActiveSession
   attr_accessor :created_at, :updated_at,
     :ip_address, :browser, :os,
     :device_name, :device_type,
-    :is_impersonated, :session_id
+    :is_impersonated, :session_id, :session_private_id
 
-  def current?(session)
-    return false if session_id.nil? || session.id.nil?
+  def current?(rack_session)
+    return false if session_private_id.nil? || rack_session.id.nil?
 
     # Rack v2.0.8+ added private_id, which uses the hash of the
     # public_id to avoid timing attacks.
-    session_id.private_id == session.id.private_id
+    session_private_id == rack_session.id.private_id
   end
 
   def human_device_type
@@ -25,13 +25,14 @@ class ActiveSession
 
   # This is not the same as Rack::Session::SessionId#public_id, but we
   # need to preserve this for backwards compatibility.
+  # TODO: remove in 13.7
   def public_id
-    Gitlab::CryptoHelper.aes256_gcm_encrypt(session_id.public_id)
+    Gitlab::CryptoHelper.aes256_gcm_encrypt(session_id)
   end
 
   def self.set(user, request)
     Gitlab::Redis::SharedState.with do |redis|
-      session_id = request.session.id.public_id
+      session_private_id = request.session.id.private_id
       client = DeviceDetector.new(request.user_agent)
       timestamp = Time.current
 
@@ -43,25 +44,37 @@ class ActiveSession
         device_type: client.device_type,
         created_at: user.current_sign_in_at || timestamp,
         updated_at: timestamp,
-        session_id: session_id,
+        # TODO: remove in 13.7
+        session_id: request.session.id.public_id,
+        session_private_id: session_private_id,
         is_impersonated: request.session[:impersonator_id].present?
       )
 
       redis.pipelined do
         redis.setex(
-          key_name(user.id, session_id),
+          key_name(user.id, session_private_id),
           Settings.gitlab['session_expire_delay'] * 60,
           Marshal.dump(active_user_session)
         )
 
         redis.sadd(
           lookup_key_name(user.id),
-          session_id
+          session_private_id
         )
+
+        # We remove the ActiveSession stored by using public_id to avoid
+        # duplicate entries
+        remove_deprecated_active_sessions_with_public_id(redis, user.id, request.session.id.public_id)
       end
     end
   end
 
+  # TODO: remove in 13.7
+  private_class_method def self.remove_deprecated_active_sessions_with_public_id(redis, user_id, rack_session_public_id)
+    redis.srem(lookup_key_name(user_id), rack_session_public_id)
+    redis.del(key_name(user_id, rack_session_public_id))
+  end
+
   def self.list(user)
     Gitlab::Redis::SharedState.with do |redis|
       cleaned_up_lookup_entries(redis, user).map do |raw_session|
@@ -70,27 +83,29 @@ class ActiveSession
     end
   end
 
-  def self.destroy(user, session_id)
-    return unless session_id
-
+  def self.cleanup(user)
     Gitlab::Redis::SharedState.with do |redis|
-      destroy_sessions(redis, user, [session_id])
+      clean_up_old_sessions(redis, user)
+      cleaned_up_lookup_entries(redis, user)
     end
   end
 
-  def self.destroy_with_public_id(user, public_id)
-    decrypted_id = decrypt_public_id(public_id)
+  # TODO: remove in 13.7
+  # After upgrade there might be a duplicate ActiveSessions:
+  # - one with the public_id stored in #session_id
+  # - another with private_id stored in #session_private_id
+  def self.destroy_with_rack_session_id(user, rack_session_id)
+    return unless rack_session_id
 
-    return if decrypted_id.nil?
-
-    session_id = Rack::Session::SessionId.new(decrypted_id)
-    destroy(user, session_id)
+    Gitlab::Redis::SharedState.with do |redis|
+      destroy_sessions(redis, user, [rack_session_id.public_id, rack_session_id.private_id])
+    end
   end
 
   def self.destroy_sessions(redis, user, session_ids)
-    key_names = session_ids.map { |session_id| key_name(user.id, session_id.public_id) }
+    key_names = session_ids.map { |session_id| key_name(user.id, session_id) }
 
-    redis.srem(lookup_key_name(user.id), session_ids.map(&:public_id))
+    redis.srem(lookup_key_name(user.id), session_ids)
 
     Gitlab::Instrumentation::RedisClusterValidator.allow_cross_slot_commands do
       redis.del(key_names)
@@ -98,19 +113,29 @@ class ActiveSession
     end
   end
 
-  def self.cleanup(user)
+  # TODO: remove in 13.7
+  # After upgrade, .destroy might be called with the session id encrypted
+  # by .public_id.
+  def self.destroy_with_deprecated_encryption(user, session_id)
+    return unless session_id
+
+    decrypted_session_id = decrypt_public_id(session_id)
+    rack_session_private_id = if decrypted_session_id
+                                Rack::Session::SessionId.new(decrypted_session_id).private_id
+                              end
+
     Gitlab::Redis::SharedState.with do |redis|
-      clean_up_old_sessions(redis, user)
-      cleaned_up_lookup_entries(redis, user)
+      destroy_sessions(redis, user, [session_id, decrypted_session_id, rack_session_private_id].compact)
     end
   end
 
-  def self.destroy_all_but_current(user, current_session)
-    session_ids = not_impersonated(user)
-    session_ids.reject! { |session| session.current?(current_session) } if current_session
+  def self.destroy_all_but_current(user, current_rack_session)
+    sessions = not_impersonated(user)
+    sessions.reject! { |session| session.current?(current_rack_session) } if current_rack_session
 
     Gitlab::Redis::SharedState.with do |redis|
-      destroy_sessions(redis, user, session_ids.map(&:session_id)) if session_ids.any?
+      session_ids = (sessions.map(&:session_id) | sessions.map(&:session_private_id)).compact
+      destroy_sessions(redis, user, session_ids) if session_ids.any?
     end
   end
 
@@ -132,17 +157,16 @@ class ActiveSession
 
   # Lists the relevant session IDs for the user.
   #
-  # Returns an array of Rack::Session::SessionId objects
+  # Returns an array of strings
   def self.session_ids_for_user(user_id)
     Gitlab::Redis::SharedState.with do |redis|
-      session_ids = redis.smembers(lookup_key_name(user_id))
-      session_ids.map { |id| Rack::Session::SessionId.new(id) }
+      redis.smembers(lookup_key_name(user_id))
     end
   end
 
   # Lists the session Hash objects for the given session IDs.
   #
-  # session_ids - An array of Rack::Session::SessionId objects
+  # session_ids - An array of strings
   #
   # Returns an array of ActiveSession objects
   def self.sessions_from_ids(session_ids)
@@ -168,27 +192,12 @@ class ActiveSession
   # Returns an ActiveSession object
   def self.load_raw_session(raw_session)
     # rubocop:disable Security/MarshalLoad
-    session = Marshal.load(raw_session)
+    Marshal.load(raw_session)
     # rubocop:enable Security/MarshalLoad
+  end
 
-    # Older ActiveSession models serialize `session_id` as strings, To
-    # avoid breaking older sessions, we keep backwards compatibility
-    # with older Redis keys and initiate Rack::Session::SessionId here.
-    session.session_id = Rack::Session::SessionId.new(session.session_id) if session.try(:session_id).is_a?(String)
-    session
-  end
-
-  def self.rack_session_keys(session_ids)
-    session_ids.each_with_object([]) do |session_id, arr|
-      # This is a redis-rack implementation detail
-      # (https://github.com/redis-store/redis-rack/blob/master/lib/rack/session/redis.rb#L88)
-      #
-      # We need to delete session keys based on the legacy public key name
-      # and the newer private ID keys, but there's no well-defined interface
-      # so we have to do it directly.
-      arr << "#{Gitlab::Redis::SharedState::SESSION_NAMESPACE}:#{session_id.public_id}"
-      arr << "#{Gitlab::Redis::SharedState::SESSION_NAMESPACE}:#{session_id.private_id}"
-    end
+  def self.rack_session_keys(rack_session_ids)
+    rack_session_ids.map { |session_id| "#{Gitlab::Redis::SharedState::SESSION_NAMESPACE}:#{session_id}" }
   end
 
   def self.raw_active_session_entries(redis, session_ids, user_id)
@@ -220,7 +229,7 @@ class ActiveSession
     sessions = active_session_entries(session_ids, user.id, redis)
     sessions.sort_by! {|session| session.updated_at }.reverse!
     destroyable_sessions = sessions.drop(ALLOWED_NUMBER_OF_ACTIVE_SESSIONS)
-    destroyable_session_ids = destroyable_sessions.map { |session| session.session_id }
+    destroyable_session_ids = destroyable_sessions.flat_map { |session| [session.session_id, session.session_private_id] }.compact
     destroy_sessions(redis, user, destroyable_session_ids) if destroyable_session_ids.any?
   end
 
@@ -244,6 +253,7 @@ class ActiveSession
     entries.compact
   end
 
+  # TODO: remove in 13.7
   private_class_method def self.decrypt_public_id(public_id)
     Gitlab::CryptoHelper.aes256_gcm_decrypt(public_id)
   rescue
diff --git a/app/models/member.rb b/app/models/member.rb
index 64453e6f24c..b221c44c748 100644
--- a/app/models/member.rb
+++ b/app/models/member.rb
@@ -20,6 +20,7 @@ class Member < ApplicationRecord
 
   delegate :name, :username, :email, to: :user, prefix: true
 
+  validates :expires_at, allow_blank: true, future_date: true
   validates :user, presence: true, unless: :invite?
   validates :source, presence: true
   validates :user_id, uniqueness: { scope: [:source_type, :source_id],
diff --git a/app/models/releases/link.rb b/app/models/releases/link.rb
index dc7e78a85a9..82272f4857a 100644
--- a/app/models/releases/link.rb
+++ b/app/models/releases/link.rb
@@ -6,7 +6,9 @@ module Releases
 
     belongs_to :release
 
-    FILEPATH_REGEX = /\A\/([\-\.\w]+\/?)*[\da-zA-Z]+\z/.freeze
+    # See https://gitlab.com/gitlab-org/gitlab/-/issues/218753
+    # Regex modified to prevent catastrophic backtracking
+    FILEPATH_REGEX = %r{\A\/[^\/](?!.*\/\/.*)[\-\.\w\/]+[\da-zA-Z]+\z}.freeze
 
     validates :url, presence: true, addressable_url: { schemes: %w(http https ftp) }, uniqueness: { scope: :release }
     validates :name, presence: true, uniqueness: { scope: :release }
diff --git a/app/services/issuable_base_service.rb b/app/services/issuable_base_service.rb
index 65a73dadc2e..e309ea7d678 100644
--- a/app/services/issuable_base_service.rb
+++ b/app/services/issuable_base_service.rb
@@ -19,6 +19,7 @@ class IssuableBaseService < BaseService
 
   def filter_params(issuable)
     unless can_admin_issuable?(issuable)
+      params.delete(:milestone)
       params.delete(:milestone_id)
       params.delete(:labels)
       params.delete(:add_label_ids)
diff --git a/app/services/issues/update_service.rb b/app/services/issues/update_service.rb
index 8d22f0edcdd..a8cd516acdb 100644
--- a/app/services/issues/update_service.rb
+++ b/app/services/issues/update_service.rb
@@ -3,6 +3,7 @@
 module Issues
   class UpdateService < Issues::BaseService
     include SpamCheckMethods
+    extend ::Gitlab::Utils::Override
 
     def execute(issue)
       handle_move_between_ids(issue)
@@ -17,6 +18,17 @@ module Issues
       super
     end
 
+    override :filter_params
+    def filter_params(issue)
+      super
+
+      # filter confidential in `Issues::UpdateService` and not in `IssuableBaseService#filtr_params`
+      # because we do allow users that cannot admin issues to set confidential flag when creating an issue
+      unless can_admin_issuable?(issue)
+        params.delete(:confidential)
+      end
+    end
+
     def before_update(issue, skip_spam_check: false)
       spam_check(issue, current_user, action: :update) unless skip_spam_check
     end
diff --git a/app/validators/future_date_validator.rb b/app/validators/future_date_validator.rb
new file mode 100644
index 00000000000..1ba4a1e273d
--- /dev/null
+++ b/app/validators/future_date_validator.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+# FutureDateValidator
+
+# Validates that a date is in the future.
+#
+# Example:
+#
+#   class Member < ActiveRecord::Base
+#     validates :expires_at, allow_blank: true, future_date: true
+#   end
+
+class FutureDateValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    record.errors.add(attribute, _('cannot be a date in the past')) if value < Date.current
+  end
+end
diff --git a/app/views/profiles/active_sessions/_active_session.html.haml b/app/views/profiles/active_sessions/_active_session.html.haml
index c4b3fa80d75..97f13a55dea 100644
--- a/app/views/profiles/active_sessions/_active_session.html.haml
+++ b/app/views/profiles/active_sessions/_active_session.html.haml
@@ -27,6 +27,9 @@
 
   - unless is_current_session
     .float-right
-      = link_to profile_active_session_path(active_session.public_id), data: { confirm: _('Are you sure? The device will be signed out of GitLab and all remember me tokens revoked.') }, method: :delete, class: "btn btn-danger gl-ml-3" do
+      = link_to(revoke_session_path(active_session),
+                { data: { confirm: _('Are you sure? The device will be signed out of GitLab and all remember me tokens revoked.') },
+                  method: :delete,
+                  class: "btn btn-danger gl-ml-3" }) do
         %span.sr-only= _('Revoke')
         = _('Revoke')
diff --git a/changelogs/unreleased/17817-hashed_session_ids_in_redis.yml b/changelogs/unreleased/17817-hashed_session_ids_in_redis.yml
new file mode 100644
index 00000000000..0c274f33f36
--- /dev/null
+++ b/changelogs/unreleased/17817-hashed_session_ids_in_redis.yml
@@ -0,0 +1,5 @@
+---
+title: Do not store session id in Redis
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/195327-update-confidentiality-and-milestone.yml b/changelogs/unreleased/195327-update-confidentiality-and-milestone.yml
new file mode 100644
index 00000000000..1f883523353
--- /dev/null
+++ b/changelogs/unreleased/195327-update-confidentiality-and-milestone.yml
@@ -0,0 +1,6 @@
+---
+title: Fix permission checks when updating confidentiality and milestone on issues
+  or merge requests
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/feature-flag-plan-limits.yml b/changelogs/unreleased/feature-flag-plan-limits.yml
new file mode 100644
index 00000000000..cac5e0847e4
--- /dev/null
+++ b/changelogs/unreleased/feature-flag-plan-limits.yml
@@ -0,0 +1,5 @@
+---
+title: Adds feature flags plan limits
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-fix_session_bypassing_for_admin_mode_in_api.yml b/changelogs/unreleased/security-fix_session_bypassing_for_admin_mode_in_api.yml
new file mode 100644
index 00000000000..bf86f177cd3
--- /dev/null
+++ b/changelogs/unreleased/security-fix_session_bypassing_for_admin_mode_in_api.yml
@@ -0,0 +1,5 @@
+---
+title: Do not bypass admin mode when authenticated with deploy token
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-fixes-release-asset-link-filepath-ReDoS.yml b/changelogs/unreleased/security-fixes-release-asset-link-filepath-ReDoS.yml
new file mode 100644
index 00000000000..e48c3ff963c
--- /dev/null
+++ b/changelogs/unreleased/security-fixes-release-asset-link-filepath-ReDoS.yml
@@ -0,0 +1,5 @@
+---
+title: Fixes release asset link filepath ReDoS
+merge_request:
+author:
+type: security
diff --git a/changelogs/unreleased/security-members-expiry-date-should-be-in-future.yml b/changelogs/unreleased/security-members-expiry-date-should-be-in-future.yml
new file mode 100644
index 00000000000..42418f24345
--- /dev/null
+++ b/changelogs/unreleased/security-members-expiry-date-should-be-in-future.yml
@@ -0,0 +1,5 @@
+---
+title: Validate that membership expiry dates are not in the past
+merge_request:
+author:
+type: security
diff --git a/config/initializers/warden.rb b/config/initializers/warden.rb
index d8a4da8cdf9..a83d83d9fb5 100644
--- a/config/initializers/warden.rb
+++ b/config/initializers/warden.rb
@@ -40,7 +40,8 @@ Rails.application.configure do |config|
     activity = Gitlab::Auth::Activity.new(opts)
     tracker = Gitlab::Auth::BlockedUserTracker.new(user, auth)
 
-    ActiveSession.destroy(user, auth.request.session.id)
+    # TODO: switch to `auth.request.session.id.private_id` in 13.7
+    ActiveSession.destroy_with_rack_session_id(user, auth.request.session.id)
     activity.user_session_destroyed!
 
     ##
diff --git a/db/migrate/20200831204646_add_project_feature_flags_to_plan_limits.rb b/db/migrate/20200831204646_add_project_feature_flags_to_plan_limits.rb
new file mode 100644
index 00000000000..d4bd2431d9c
--- /dev/null
+++ b/db/migrate/20200831204646_add_project_feature_flags_to_plan_limits.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AddProjectFeatureFlagsToPlanLimits < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def change
+    add_column(:plan_limits, :project_feature_flags, :integer, default: 200, null: false)
+  end
+end
diff --git a/db/migrate/20200831222347_insert_project_feature_flags_plan_limits.rb b/db/migrate/20200831222347_insert_project_feature_flags_plan_limits.rb
new file mode 100644
index 00000000000..2c91016d9dd
--- /dev/null
+++ b/db/migrate/20200831222347_insert_project_feature_flags_plan_limits.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class InsertProjectFeatureFlagsPlanLimits < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    return unless Gitlab.com?
+
+    create_or_update_plan_limit('project_feature_flags', 'free', 50)
+    create_or_update_plan_limit('project_feature_flags', 'bronze', 100)
+    create_or_update_plan_limit('project_feature_flags', 'silver', 150)
+    create_or_update_plan_limit('project_feature_flags', 'gold', 200)
+  end
+
+  def down
+    return unless Gitlab.com?
+
+    create_or_update_plan_limit('project_feature_flags', 'free', 0)
+    create_or_update_plan_limit('project_feature_flags', 'bronze', 0)
+    create_or_update_plan_limit('project_feature_flags', 'silver', 0)
+    create_or_update_plan_limit('project_feature_flags', 'gold', 0)
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index 3c8a6a74c8e..179be83d2cc 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -13891,7 +13891,8 @@ CREATE TABLE public.plan_limits (
     ci_max_artifact_size_requirements integer DEFAULT 0 NOT NULL,
     ci_max_artifact_size_coverage_fuzzing integer DEFAULT 0 NOT NULL,
     ci_max_artifact_size_browser_performance integer DEFAULT 0 NOT NULL,
-    ci_max_artifact_size_load_performance integer DEFAULT 0 NOT NULL
+    ci_max_artifact_size_load_performance integer DEFAULT 0 NOT NULL,
+    project_feature_flags integer DEFAULT 200 NOT NULL
 );
 
 CREATE SEQUENCE public.plan_limits_id_seq
@@ -23869,5 +23870,7 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200716120419
 20200717040735
 20200728182311
+20200831204646
+20200831222347
 \.
 
diff --git a/lib/api/api_guard.rb b/lib/api/api_guard.rb
index 8c4c466cd75..8633df4cb70 100644
--- a/lib/api/api_guard.rb
+++ b/lib/api/api_guard.rb
@@ -53,8 +53,10 @@ module API
         user = find_user_from_sources
         return unless user
 
-        # Sessions are enforced to be unavailable for API calls, so ignore them for admin mode
-        Gitlab::Auth::CurrentUserMode.bypass_session!(user.id) if Feature.enabled?(:user_mode_in_session)
+        if user.is_a?(User) && Feature.enabled?(:user_mode_in_session)
+          # Sessions are enforced to be unavailable for API calls, so ignore them for admin mode
+          Gitlab::Auth::CurrentUserMode.bypass_session!(user.id)
+        end
 
         unless api_access_allowed?(user)
           forbidden!(api_access_denied_message(user))
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 81f7b67b2ad..95a57c3d55a 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -27623,6 +27623,9 @@ msgstr ""
 msgid "by %{user}"
 msgstr ""
 
+msgid "cannot be a date in the past"
+msgstr ""
+
 msgid "cannot be changed if a personal project has container registry tags."
 msgstr ""
 
diff --git a/spec/controllers/groups/group_members_controller_spec.rb b/spec/controllers/groups/group_members_controller_spec.rb
index 85f1b247ee9..4b9dd3629f1 100644
--- a/spec/controllers/groups/group_members_controller_spec.rb
+++ b/spec/controllers/groups/group_members_controller_spec.rb
@@ -139,6 +139,45 @@ RSpec.describe Groups::GroupMembersController do
         expect(group.users).not_to include group_user
       end
     end
+
+    context 'access expiry date' do
+      before do
+        group.add_owner(user)
+      end
+
+      subject do
+        post :create, params: {
+                        group_id: group,
+                        user_ids: group_user.id,
+                        access_level: Gitlab::Access::GUEST,
+                        expires_at: expires_at
+                      }
+      end
+
+      context 'when set to a date in the past' do
+        let(:expires_at) { 2.days.ago }
+
+        it 'does not add user to members' do
+          subject
+
+          expect(flash[:alert]).to include('Expires at cannot be a date in the past')
+          expect(response).to redirect_to(group_group_members_path(group))
+          expect(group.users).not_to include group_user
+        end
+      end
+
+      context 'when set to a date in the future' do
+        let(:expires_at) { 5.days.from_now }
+
+        it 'adds user to members' do
+          subject
+
+          expect(response).to set_flash.to 'Users were successfully added.'
+          expect(response).to redirect_to(group_group_members_path(group))
+          expect(group.users).to include group_user
+        end
+      end
+    end
   end
 
   describe 'PUT update' do
@@ -149,15 +188,49 @@ RSpec.describe Groups::GroupMembersController do
       sign_in(user)
     end
 
-    Gitlab::Access.options.each do |label, value|
-      it "can change the access level to #{label}" do
-        put :update, params: {
-          group_member: { access_level: value },
-          group_id: group,
-          id: requester
-        }, xhr: true
+    context 'access level' do
+      Gitlab::Access.options.each do |label, value|
+        it "can change the access level to #{label}" do
+          put :update, params: {
+            group_member: { access_level: value },
+            group_id: group,
+            id: requester
+          }, xhr: true
 
-        expect(requester.reload.human_access).to eq(label)
+          expect(requester.reload.human_access).to eq(label)
+        end
+      end
+    end
+
+    context 'access expiry date' do
+      subject do
+        put :update, xhr: true, params: {
+                                          group_member: {
+                                            expires_at: expires_at
+                                          },
+                                          group_id: group,
+                                          id: requester
+                                        }
+      end
+
+      context 'when set to a date in the past' do
+        let(:expires_at) { 2.days.ago }
+
+        it 'does not update the member' do
+          subject
+
+          expect(requester.reload.expires_at).not_to eq(expires_at.to_date)
+        end
+      end
+
+      context 'when set to a date in the future' do
+        let(:expires_at) { 5.days.from_now }
+
+        it 'updates the member' do
+          subject
+
+          expect(requester.reload.expires_at).to eq(expires_at.to_date)
+        end
       end
     end
   end
diff --git a/spec/controllers/projects/project_members_controller_spec.rb b/spec/controllers/projects/project_members_controller_spec.rb
index 40a220d57a7..ae05e2d2631 100644
--- a/spec/controllers/projects/project_members_controller_spec.rb
+++ b/spec/controllers/projects/project_members_controller_spec.rb
@@ -129,6 +129,46 @@ RSpec.describe Projects::ProjectMembersController do
         expect(response).to redirect_to(project_project_members_path(project))
       end
     end
+
+    context 'access expiry date' do
+      before do
+        project.add_maintainer(user)
+      end
+
+      subject do
+        post :create, params: {
+                        namespace_id: project.namespace,
+                        project_id: project,
+                        user_ids: project_user.id,
+                        access_level: Gitlab::Access::GUEST,
+                        expires_at: expires_at
+                      }
+      end
+
+      context 'when set to a date in the past' do
+        let(:expires_at) { 2.days.ago }
+
+        it 'does not add user to members' do
+          subject
+
+          expect(flash[:alert]).to include('Expires at cannot be a date in the past')
+          expect(response).to redirect_to(project_project_members_path(project))
+          expect(project.users).not_to include project_user
+        end
+      end
+
+      context 'when set to a date in the future' do
+        let(:expires_at) { 5.days.from_now }
+
+        it 'adds user to members' do
+          subject
+
+          expect(response).to set_flash.to 'Users were successfully added.'
+          expect(response).to redirect_to(project_project_members_path(project))
+          expect(project.users).to include project_user
+        end
+      end
+    end
   end
 
   describe 'PUT update' do
@@ -139,16 +179,53 @@ RSpec.describe Projects::ProjectMembersController do
       sign_in(user)
     end
 
-    Gitlab::Access.options.each do |label, value|
-      it "can change the access level to #{label}" do
-        put :update, params: {
-          project_member: { access_level: value },
-          namespace_id: project.namespace,
-          project_id: project,
-          id: requester
-        }, xhr: true
+    context 'access level' do
+      Gitlab::Access.options.each do |label, value|
+        it "can change the access level to #{label}" do
+          params = {
+            project_member: { access_level: value },
+            namespace_id: project.namespace,
+            project_id: project,
+            id: requester
+          }
+
+          put :update, params: params, xhr: true
+
+          expect(requester.reload.human_access).to eq(label)
+        end
+      end
+    end
+
+    context 'access expiry date' do
+      subject do
+        put :update, xhr: true, params: {
+                                          project_member: {
+                                            expires_at: expires_at
+                                          },
+                                          namespace_id: project.namespace,
+                                          project_id: project,
+                                          id: requester
+                                        }
+      end
 
-        expect(requester.reload.human_access).to eq(label)
+      context 'when set to a date in the past' do
+        let(:expires_at) { 2.days.ago }
+
+        it 'does not update the member' do
+          subject
+
+          expect(requester.reload.expires_at).not_to eq(expires_at.to_date)
+        end
+      end
+
+      context 'when set to a date in the future' do
+        let(:expires_at) { 5.days.from_now }
+
+        it 'updates the member' do
+          subject
+
+          expect(requester.reload.expires_at).to eq(expires_at.to_date)
+        end
       end
     end
   end
diff --git a/spec/graphql/mutations/issues/set_confidential_spec.rb b/spec/graphql/mutations/issues/set_confidential_spec.rb
index 820f9aa5e17..0b2fc0ecb93 100644
--- a/spec/graphql/mutations/issues/set_confidential_spec.rb
+++ b/spec/graphql/mutations/issues/set_confidential_spec.rb
@@ -3,7 +3,8 @@
 require 'spec_helper'
 
 RSpec.describe Mutations::Issues::SetConfidential do
-  let(:issue) { create(:issue) }
+  let(:project) { create(:project, :private) }
+  let(:issue) { create(:issue, project: project, assignees: [user]) }
   let(:user) { create(:user) }
 
   subject(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
@@ -14,7 +15,7 @@ RSpec.describe Mutations::Issues::SetConfidential do
     let(:confidential) { true }
     let(:mutated_issue) { subject[:issue] }
 
-    subject { mutation.resolve(project_path: issue.project.full_path, iid: issue.iid, confidential: confidential) }
+    subject { mutation.resolve(project_path: project.full_path, iid: issue.iid, confidential: confidential) }
 
     it 'raises an error if the resource is not accessible to the user' do
       expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
@@ -22,7 +23,7 @@ RSpec.describe Mutations::Issues::SetConfidential do
 
     context 'when the user can update the issue' do
       before do
-        issue.project.add_developer(user)
+        project.add_developer(user)
       end
 
       it 'returns the issue as confidential' do
@@ -39,5 +40,19 @@ RSpec.describe Mutations::Issues::SetConfidential do
         end
       end
     end
+
+    context 'when guest user is an assignee' do
+      let(:project) { create(:project, :public) }
+
+      before do
+        project.add_guest(user)
+      end
+
+      it 'does not change issue confidentiality' do
+        expect(mutated_issue).to eq(issue)
+        expect(mutated_issue.confidential).to be_falsey
+        expect(subject[:errors]).to be_empty
+      end
+    end
   end
 end
diff --git a/spec/graphql/mutations/merge_requests/set_milestone_spec.rb b/spec/graphql/mutations/merge_requests/set_milestone_spec.rb
index 1c0d655ee83..ccb2d9bd132 100644
--- a/spec/graphql/mutations/merge_requests/set_milestone_spec.rb
+++ b/spec/graphql/mutations/merge_requests/set_milestone_spec.rb
@@ -3,31 +3,29 @@
 require 'spec_helper'
 
 RSpec.describe Mutations::MergeRequests::SetMilestone do
-  let(:merge_request) { create(:merge_request) }
   let(:user) { create(:user) }
+  let(:project) { create(:project, :private) }
+  let(:merge_request) { create(:merge_request, source_project: project, target_project: project, assignees: [user]) }
+  let(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+  let(:milestone) { create(:milestone, project: project) }
 
-  subject(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+  subject { mutation.resolve(project_path: project.full_path, iid: merge_request.iid, milestone: milestone) }
 
   specify { expect(described_class).to require_graphql_authorizations(:update_merge_request) }
 
   describe '#resolve' do
-    let(:milestone) { create(:milestone, project: merge_request.project) }
-    let(:mutated_merge_request) { subject[:merge_request] }
-
-    subject { mutation.resolve(project_path: merge_request.project.full_path, iid: merge_request.iid, milestone: milestone) }
-
     it 'raises an error if the resource is not accessible to the user' do
       expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
     end
 
     context 'when the user can update the merge request' do
       before do
-        merge_request.project.add_developer(user)
+        project.add_developer(user)
       end
 
       it 'returns the merge request with the milestone' do
-        expect(mutated_merge_request).to eq(merge_request)
-        expect(mutated_merge_request.milestone).to eq(milestone)
+        expect(subject[:merge_request]).to eq(merge_request)
+        expect(subject[:merge_request].milestone).to eq(milestone)
         expect(subject[:errors]).to be_empty
       end
 
@@ -43,13 +41,37 @@ RSpec.describe Mutations::MergeRequests::SetMilestone do
         let(:milestone) { nil }
 
         it 'removes the milestone' do
-          merge_request.update!(milestone: create(:milestone, project: merge_request.project))
+          merge_request.update!(milestone: create(:milestone, project: project))
 
-          expect(mutated_merge_request.milestone).to eq(nil)
+          expect(subject[:merge_request].milestone).to be_nil
         end
 
         it 'does not do anything if the MR already does not have a milestone' do
-          expect(mutated_merge_request.milestone).to eq(nil)
+          expect(subject[:merge_request].milestone).to be_nil
+        end
+      end
+    end
+
+    context 'when issue assignee is a guest' do
+      let(:project) { create(:project, :public) }
+
+      before do
+        project.add_guest(user)
+      end
+
+      it 'does not update the milestone' do
+        expect(subject[:merge_request]).to eq(merge_request)
+        expect(subject[:merge_request].milestone).to be_nil
+        expect(subject[:errors]).to be_empty
+      end
+
+      context 'when passing milestone_id as nil' do
+        let(:milestone) { nil }
+
+        it 'does not remove the milestone' do
+          merge_request.update!(milestone: create(:milestone, project: project))
+
+          expect(subject[:merge_request].milestone).not_to be_nil
         end
       end
     end
diff --git a/spec/migrations/insert_project_feature_flags_plan_limits_spec.rb b/spec/migrations/insert_project_feature_flags_plan_limits_spec.rb
new file mode 100644
index 00000000000..1ad070de1ea
--- /dev/null
+++ b/spec/migrations/insert_project_feature_flags_plan_limits_spec.rb
@@ -0,0 +1,80 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join(
+  'db',
+  'migrate',
+  '20200831222347_insert_project_feature_flags_plan_limits.rb'
+)
+
+RSpec.describe InsertProjectFeatureFlagsPlanLimits do
+  let(:migration) { described_class.new }
+  let(:plans) { table(:plans) }
+  let(:plan_limits) { table(:plan_limits) }
+  let!(:default_plan) { plans.create!(name: 'default') }
+  let!(:free_plan) { plans.create!(name: 'free') }
+  let!(:bronze_plan) { plans.create!(name: 'bronze') }
+  let!(:silver_plan) { plans.create!(name: 'silver') }
+  let!(:gold_plan) { plans.create!(name: 'gold') }
+  let!(:default_plan_limits) do
+    plan_limits.create!(plan_id: default_plan.id, project_feature_flags: 200)
+  end
+
+  context 'when on Gitlab.com' do
+    before do
+      expect(Gitlab).to receive(:com?).at_most(:twice).and_return(true)
+    end
+
+    describe '#up' do
+      it 'updates the project_feature_flags plan limits' do
+        migration.up
+
+        expect(plan_limits.pluck(:plan_id, :project_feature_flags)).to contain_exactly(
+          [default_plan.id, 200],
+          [free_plan.id, 50],
+          [bronze_plan.id, 100],
+          [silver_plan.id, 150],
+          [gold_plan.id, 200]
+        )
+      end
+    end
+
+    describe '#down' do
+      it 'removes the project_feature_flags plan limits' do
+        migration.up
+        migration.down
+
+        expect(plan_limits.pluck(:plan_id, :project_feature_flags)).to contain_exactly(
+          [default_plan.id, 200],
+          [free_plan.id, 0],
+          [bronze_plan.id, 0],
+          [silver_plan.id, 0],
+          [gold_plan.id, 0]
+        )
+      end
+    end
+  end
+
+  context 'when on self-hosted' do
+    before do
+      expect(Gitlab).to receive(:com?).at_most(:twice).and_return(false)
+    end
+
+    describe '#up' do
+      it 'does not change the plan limits' do
+        migration.up
+
+        expect(plan_limits.pluck(:project_feature_flags)).to contain_exactly(200)
+      end
+    end
+
+    describe '#down' do
+      it 'does not change the plan limits' do
+        migration.up
+        migration.down
+
+        expect(plan_limits.pluck(:project_feature_flags)).to contain_exactly(200)
+      end
+    end
+  end
+end
diff --git a/spec/models/active_session_spec.rb b/spec/models/active_session_spec.rb
index de39c8c7c5c..f0bae3f29c0 100644
--- a/spec/models/active_session_spec.rb
+++ b/spec/models/active_session_spec.rb
@@ -23,7 +23,7 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
 
   describe '#current?' do
     it 'returns true if the active session matches the current session' do
-      active_session = ActiveSession.new(session_id: rack_session)
+      active_session = ActiveSession.new(session_private_id: rack_session.private_id)
 
       expect(active_session.current?(session)).to be true
     end
@@ -45,7 +45,7 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
   describe '#public_id' do
     it 'returns an encrypted, url-encoded session id' do
       original_session_id = Rack::Session::SessionId.new("!*'();:@&\n=+$,/?%abcd#123[4567]8")
-      active_session = ActiveSession.new(session_id: original_session_id)
+      active_session = ActiveSession.new(session_id: original_session_id.public_id)
       encrypted_id = active_session.public_id
       derived_session_id = Gitlab::CryptoHelper.aes256_gcm_decrypt(encrypted_id)
 
@@ -106,8 +106,8 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
         redis.sadd(
           "session:lookup:user:gitlab:#{user.id}",
           %w[
-            6919a6f1bb119dd7396fadc38fd18d0d
-            59822c7d9fcdfa03725eff41782ad97d
+            2::418729c72310bbf349a032f0bb6e3fce9f5a69df8f000d8ae0ac5d159d8f21ae
+            2::d2ee6f70d6ef0e8701efa3f6b281cbe8e6bf3d109ef052a8b5ce88bfc7e71c26
           ]
         )
       end
@@ -135,7 +135,7 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
         redis.set("session:gitlab:#{rack_session.private_id}", Marshal.dump({ _csrf_token: 'abcd' }))
       end
 
-      expect(ActiveSession.sessions_from_ids([rack_session])).to eq [{ _csrf_token: 'abcd' }]
+      expect(ActiveSession.sessions_from_ids([rack_session.private_id])).to eq [{ _csrf_token: 'abcd' }]
     end
 
     it 'avoids a redis lookup for an empty array' do
@@ -150,12 +150,11 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
       redis = double(:redis)
       expect(Gitlab::Redis::SharedState).to receive(:with).and_yield(redis)
 
-      sessions = %w[session-a session-b session-c session-d]
+      sessions = %w[session-a session-b]
       mget_responses = sessions.map { |session| [Marshal.dump(session)]}
-      expect(redis).to receive(:mget).exactly(4).times.and_return(*mget_responses)
+      expect(redis).to receive(:mget).twice.times.and_return(*mget_responses)
 
-      session_ids = [1, 2].map { |id| Rack::Session::SessionId.new(id.to_s) }
-      expect(ActiveSession.sessions_from_ids(session_ids).map(&:to_s)).to eql(sessions)
+      expect(ActiveSession.sessions_from_ids([1, 2])).to eql(sessions)
     end
   end
 
@@ -165,7 +164,7 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
 
       Gitlab::Redis::SharedState.with do |redis|
         expect(redis.scan_each.to_a).to include(
-          "session:user:gitlab:#{user.id}:6919a6f1bb119dd7396fadc38fd18d0d",
+          "session:user:gitlab:#{user.id}:2::418729c72310bbf349a032f0bb6e3fce9f5a69df8f000d8ae0ac5d159d8f21ae",
           "session:lookup:user:gitlab:#{user.id}"
         )
       end
@@ -208,13 +207,41 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
         end
       end
     end
+
+    context 'ActiveSession stored by deprecated rack_session_public_key' do
+      let(:active_session) { ActiveSession.new(session_id: rack_session.public_id) }
+      let(:deprecated_active_session_lookup_key) { rack_session.public_id }
+
+      before do
+        Gitlab::Redis::SharedState.with do |redis|
+          redis.set("session:user:gitlab:#{user.id}:#{deprecated_active_session_lookup_key}",
+                    '')
+          redis.sadd(described_class.lookup_key_name(user.id),
+                     deprecated_active_session_lookup_key)
+        end
+      end
+
+      it 'removes deprecated key and stores only new one' do
+        expected_session_keys = ["session:user:gitlab:#{user.id}:#{rack_session.private_id}",
+                                 "session:lookup:user:gitlab:#{user.id}"]
+
+        ActiveSession.set(user, request)
+
+        Gitlab::Redis::SharedState.with do |redis|
+          actual_session_keys = redis.scan_each(match: 'session:*').to_a
+          expect(actual_session_keys).to(match_array(expected_session_keys))
+
+          expect(redis.smembers("session:lookup:user:gitlab:#{user.id}")).to eq [rack_session.private_id]
+        end
+      end
+    end
   end
 
-  describe '.destroy' do
+  describe '.destroy_with_rack_session_id' do
     it 'gracefully handles a nil session ID' do
       expect(described_class).not_to receive(:destroy_sessions)
 
-      ActiveSession.destroy(user, nil)
+      ActiveSession.destroy_with_rack_session_id(user, nil)
     end
 
     it 'removes the entry associated with the currently killed user session' do
@@ -224,7 +251,7 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
         redis.set("session:user:gitlab:9999:5c8611e4f9c69645ad1a1492f4131358", '')
       end
 
-      ActiveSession.destroy(user, request.session.id)
+      ActiveSession.destroy_with_rack_session_id(user, request.session.id)
 
       Gitlab::Redis::SharedState.with do |redis|
         expect(redis.scan_each(match: "session:user:gitlab:*")).to match_array [
@@ -240,7 +267,7 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
         redis.sadd("session:lookup:user:gitlab:#{user.id}", '6919a6f1bb119dd7396fadc38fd18d0d')
       end
 
-      ActiveSession.destroy(user, request.session.id)
+      ActiveSession.destroy_with_rack_session_id(user, request.session.id)
 
       Gitlab::Redis::SharedState.with do |redis|
         expect(redis.scan_each(match: "session:lookup:user:gitlab:#{user.id}").to_a).to be_empty
@@ -249,12 +276,12 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
 
     it 'removes the devise session' do
       Gitlab::Redis::SharedState.with do |redis|
-        redis.set("session:user:gitlab:#{user.id}:#{rack_session.public_id}", '')
+        redis.set("session:user:gitlab:#{user.id}:#{rack_session.private_id}", '')
         # Emulate redis-rack: https://github.com/redis-store/redis-rack/blob/c75f7f1a6016ee224e2615017fbfee964f23a837/lib/rack/session/redis.rb#L88
         redis.set("session:gitlab:#{rack_session.private_id}", '')
       end
 
-      ActiveSession.destroy(user, request.session.id)
+      ActiveSession.destroy_with_rack_session_id(user, request.session.id)
 
       Gitlab::Redis::SharedState.with do |redis|
         expect(redis.scan_each(match: "session:gitlab:*").to_a).to be_empty
@@ -262,37 +289,83 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
     end
   end
 
-  describe '.destroy_with_public_id' do
-    it 'receives a user and public id and destroys the associated session' do
-      ActiveSession.set(user, request)
-      session = ActiveSession.list(user).first
+  describe '.destroy_with_deprecated_encryption' do
+    shared_examples 'removes all session data' do
+      before do
+        Gitlab::Redis::SharedState.with do |redis|
+          redis.set("session:user:gitlab:#{user.id}:#{active_session_lookup_key}", '')
+          # Emulate redis-rack: https://github.com/redis-store/redis-rack/blob/c75f7f1a6016ee224e2615017fbfee964f23a837/lib/rack/session/redis.rb#L88
+          redis.set("session:gitlab:#{rack_session.private_id}", '')
+
+          redis.set(described_class.key_name(user.id, active_session_lookup_key),
+                    Marshal.dump(active_session))
+          redis.sadd(described_class.lookup_key_name(user.id),
+                     active_session_lookup_key)
+        end
+      end
+
+      it 'removes the devise session' do
+        subject
+
+        Gitlab::Redis::SharedState.with do |redis|
+          expect(redis.scan_each(match: "session:gitlab:*").to_a).to be_empty
+        end
+      end
 
-      ActiveSession.destroy_with_public_id(user, session.public_id)
+      it 'removes the lookup entry' do
+        subject
 
-      total_sessions = ActiveSession.list(user).count
-      expect(total_sessions).to eq 0
+        Gitlab::Redis::SharedState.with do |redis|
+          expect(redis.scan_each(match: "session:lookup:user:gitlab:#{user.id}").to_a).to be_empty
+        end
+      end
+
+      it 'removes the ActiveSession' do
+        subject
+
+        Gitlab::Redis::SharedState.with do |redis|
+          expect(redis.scan_each(match: "session:user:gitlab:*").to_a).to be_empty
+        end
+      end
     end
 
-    it 'handles invalid input for public id' do
-      expect do
-        ActiveSession.destroy_with_public_id(user, nil)
-      end.not_to raise_error
+    context 'destroy called with Rack::Session::SessionId#private_id' do
+      subject { ActiveSession.destroy_with_deprecated_encryption(user, rack_session.private_id) }
+
+      it 'calls .destroy_sessions' do
+        expect(ActiveSession).to(
+          receive(:destroy_sessions)
+            .with(anything, user, [rack_session.private_id]))
+
+        subject
+      end
 
-      expect do
-        ActiveSession.destroy_with_public_id(user, "")
-      end.not_to raise_error
+      context 'ActiveSession with session_private_id' do
+        let(:active_session) { ActiveSession.new(session_private_id: rack_session.private_id) }
+        let(:active_session_lookup_key) { rack_session.private_id }
 
-      expect do
-        ActiveSession.destroy_with_public_id(user, "aaaaaaaa")
-      end.not_to raise_error
+        include_examples 'removes all session data'
+      end
     end
 
-    it 'does not attempt to destroy session when given invalid input for public id' do
-      expect(ActiveSession).not_to receive(:destroy)
+    context 'destroy called with ActiveSession#public_id (deprecated)' do
+      let(:active_session) { ActiveSession.new(session_id: rack_session.public_id) }
+      let(:encrypted_active_session_id) { active_session.public_id }
+      let(:active_session_lookup_key) { rack_session.public_id }
+
+      subject { ActiveSession.destroy_with_deprecated_encryption(user, encrypted_active_session_id) }
+
+      it 'calls .destroy_sessions' do
+        expect(ActiveSession).to(
+          receive(:destroy_sessions)
+            .with(anything, user, [active_session.public_id, rack_session.public_id, rack_session.private_id]))
+
+        subject
+      end
 
-      ActiveSession.destroy_with_public_id(user, nil)
-      ActiveSession.destroy_with_public_id(user, "")
-      ActiveSession.destroy_with_public_id(user, "aaaaaaaa")
+      context 'ActiveSession with session_id (deprecated)' do
+        include_examples 'removes all session data'
+      end
     end
   end
 
@@ -308,29 +381,43 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
 
       before do
         Gitlab::Redis::SharedState.with do |redis|
-          redis.set(described_class.key_name(user.id, current_session_id),
-            Marshal.dump(ActiveSession.new(session_id: Rack::Session::SessionId.new(current_session_id))))
-          redis.set(described_class.key_name(user.id, '59822c7d9fcdfa03725eff41782ad97d'),
-            Marshal.dump(ActiveSession.new(session_id: Rack::Session::SessionId.new('59822c7d9fcdfa03725eff41782ad97d'))))
-          redis.set(described_class.key_name(9999, '5c8611e4f9c69645ad1a1492f4131358'),
-            Marshal.dump(ActiveSession.new(session_id: Rack::Session::SessionId.new('5c8611e4f9c69645ad1a1492f4131358'))))
-          redis.sadd(described_class.lookup_key_name(user.id), '59822c7d9fcdfa03725eff41782ad97d')
-          redis.sadd(described_class.lookup_key_name(user.id), current_session_id)
-          redis.sadd(described_class.lookup_key_name(9999), '5c8611e4f9c69645ad1a1492f4131358')
+          # setup for current user
+          [current_session_id, '59822c7d9fcdfa03725eff41782ad97d'].each do |session_public_id|
+            session_private_id = Rack::Session::SessionId.new(session_public_id).private_id
+            active_session = ActiveSession.new(session_private_id: session_private_id)
+            redis.set(described_class.key_name(user.id, session_private_id),
+                      Marshal.dump(active_session))
+            redis.sadd(described_class.lookup_key_name(user.id),
+                       session_private_id)
+          end
+
+          # setup for unrelated user
+          unrelated_user_id = 9999
+          session_private_id = Rack::Session::SessionId.new('5c8611e4f9c69645ad1a1492f4131358').private_id
+          active_session = ActiveSession.new(session_private_id: session_private_id)
+
+          redis.set(described_class.key_name(unrelated_user_id, session_private_id),
+                    Marshal.dump(active_session))
+          redis.sadd(described_class.lookup_key_name(unrelated_user_id),
+                     session_private_id)
         end
       end
 
       it 'removes the entry associated with the all user sessions but current' do
-        expect { ActiveSession.destroy_all_but_current(user, request.session) }.to change { ActiveSession.session_ids_for_user(user.id).size }.from(2).to(1)
+        expect { ActiveSession.destroy_all_but_current(user, request.session) }
+          .to(change { ActiveSession.session_ids_for_user(user.id).size }.from(2).to(1))
 
         expect(ActiveSession.session_ids_for_user(9999).size).to eq(1)
       end
 
       it 'removes the lookup entry of deleted sessions' do
+        session_private_id = Rack::Session::SessionId.new(current_session_id).private_id
         ActiveSession.destroy_all_but_current(user, request.session)
 
         Gitlab::Redis::SharedState.with do |redis|
-          expect(redis.smembers(described_class.lookup_key_name(user.id))).to eq [current_session_id]
+          expect(
+            redis.smembers(described_class.lookup_key_name(user.id))
+          ).to eq([session_private_id])
         end
       end
 
@@ -464,5 +551,38 @@ RSpec.describe ActiveSession, :clean_gitlab_redis_shared_state do
         end
       end
     end
+
+    context 'cleaning up old sessions stored by Rack::Session::SessionId#private_id' do
+      let(:max_number_of_sessions_plus_one) { ActiveSession::ALLOWED_NUMBER_OF_ACTIVE_SESSIONS + 1 }
+      let(:max_number_of_sessions_plus_two) { ActiveSession::ALLOWED_NUMBER_OF_ACTIVE_SESSIONS + 2 }
+
+      before do
+        Gitlab::Redis::SharedState.with do |redis|
+          (1..max_number_of_sessions_plus_two).each do |number|
+            redis.set(
+              "session:user:gitlab:#{user.id}:#{number}",
+              Marshal.dump(ActiveSession.new(session_private_id: number.to_s, updated_at: number.days.ago))
+            )
+            redis.sadd(
+              "session:lookup:user:gitlab:#{user.id}",
+              "#{number}"
+            )
+          end
+        end
+      end
+
+      it 'removes obsolete active sessions entries' do
+        ActiveSession.cleanup(user)
+
+        Gitlab::Redis::SharedState.with do |redis|
+          sessions = redis.scan_each(match: "session:user:gitlab:#{user.id}:*").to_a
+
+          expect(sessions.count).to eq(ActiveSession::ALLOWED_NUMBER_OF_ACTIVE_SESSIONS)
+          expect(sessions).not_to(
+            include("session:user:gitlab:#{user.id}:#{max_number_of_sessions_plus_one}",
+                    "session:user:gitlab:#{user.id}:#{max_number_of_sessions_plus_two}"))
+        end
+      end
+    end
   end
 end
diff --git a/spec/models/concerns/expirable_spec.rb b/spec/models/concerns/expirable_spec.rb
index b20d759fc3f..5eb6530881e 100644
--- a/spec/models/concerns/expirable_spec.rb
+++ b/spec/models/concerns/expirable_spec.rb
@@ -4,9 +4,13 @@ require 'spec_helper'
 
 RSpec.describe Expirable do
   describe 'ProjectMember' do
-    let(:no_expire) { create(:project_member) }
-    let(:expire_later) { create(:project_member, expires_at: Time.current + 6.days) }
-    let(:expired) { create(:project_member, expires_at: Time.current - 6.days) }
+    let_it_be(:no_expire) { create(:project_member) }
+    let_it_be(:expire_later) { create(:project_member, expires_at: 8.days.from_now) }
+    let_it_be(:expired) { create(:project_member, expires_at: 1.day.from_now) }
+
+    before do
+      travel_to(3.days.from_now)
+    end
 
     describe '.expired' do
       it { expect(ProjectMember.expired).to match_array([expired]) }
diff --git a/spec/models/member_spec.rb b/spec/models/member_spec.rb
index 4323263855e..d1b81d99867 100644
--- a/spec/models/member_spec.rb
+++ b/spec/models/member_spec.rb
@@ -18,6 +18,13 @@ RSpec.describe Member do
     it { is_expected.to validate_presence_of(:source) }
     it { is_expected.to validate_inclusion_of(:access_level).in_array(Gitlab::Access.all_values) }
 
+    context 'expires_at' do
+      it { is_expected.not_to allow_value(Date.yesterday).for(:expires_at) }
+      it { is_expected.to allow_value(Date.tomorrow).for(:expires_at) }
+      it { is_expected.to allow_value(Date.today).for(:expires_at) }
+      it { is_expected.to allow_value(nil).for(:expires_at) }
+    end
+
     it_behaves_like 'an object with email-formated attributes', :invite_email do
       subject { build(:project_member) }
     end
diff --git a/spec/models/members/project_member_spec.rb b/spec/models/members/project_member_spec.rb
index f25f8933184..388d04c8012 100644
--- a/spec/models/members/project_member_spec.rb
+++ b/spec/models/members/project_member_spec.rb
@@ -44,8 +44,9 @@ RSpec.describe ProjectMember do
     let(:maintainer) { create(:project_member, project: project) }
 
     it "creates an expired event when left due to expiry" do
-      expired = create(:project_member, project: project, expires_at: Time.current - 6.days)
-      expired.destroy
+      expired = create(:project_member, project: project, expires_at: 1.day.from_now)
+      travel_to(2.days.from_now) { expired.destroy }
+
       expect(Event.recent.first).to be_expired_action
     end
 
diff --git a/spec/requests/api/api_spec.rb b/spec/requests/api/api_spec.rb
index bd0426601db..7d637757f38 100644
--- a/spec/requests/api/api_spec.rb
+++ b/spec/requests/api/api_spec.rb
@@ -67,4 +67,29 @@ RSpec.describe API::API do
       end
     end
   end
+
+  describe 'authentication with deploy token' do
+    context 'admin mode' do
+      let_it_be(:project) { create(:project, :public) }
+      let_it_be(:package) { create(:maven_package, project: project, name: project.full_path) }
+      let_it_be(:maven_metadatum) { package.maven_metadatum }
+      let_it_be(:package_file) { package.package_files.first }
+      let_it_be(:deploy_token) { create(:deploy_token) }
+      let(:headers_with_deploy_token) do
+        {
+          Gitlab::Auth::AuthFinders::DEPLOY_TOKEN_HEADER => deploy_token.token
+        }
+      end
+
+      it 'does not bypass the session' do
+        expect(Gitlab::Auth::CurrentUserMode).not_to receive(:bypass_session!)
+
+        get(api("/packages/maven/#{maven_metadatum.path}/#{package_file.file_name}"),
+            headers: headers_with_deploy_token)
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(response.media_type).to eq('application/octet-stream')
+      end
+    end
+  end
 end
diff --git a/spec/requests/api/members_spec.rb b/spec/requests/api/members_spec.rb
index 23889912d7a..549853db88c 100644
--- a/spec/requests/api/members_spec.rb
+++ b/spec/requests/api/members_spec.rb
@@ -244,13 +244,12 @@ RSpec.describe API::Members do
         it 'creates a new member' do
           expect do
             post api("/#{source_type.pluralize}/#{source.id}/members", maintainer),
-                 params: { user_id: stranger.id, access_level: Member::DEVELOPER, expires_at: '2016-08-05' }
+                 params: { user_id: stranger.id, access_level: Member::DEVELOPER }
 
             expect(response).to have_gitlab_http_status(:created)
           end.to change { source.members.count }.by(1)
           expect(json_response['id']).to eq(stranger.id)
           expect(json_response['access_level']).to eq(Member::DEVELOPER)
-          expect(json_response['expires_at']).to eq('2016-08-05')
         end
       end
 
@@ -285,6 +284,40 @@ RSpec.describe API::Members do
         end
       end
 
+      context 'access expiry date' do
+        subject do
+          post api("/#{source_type.pluralize}/#{source.id}/members", maintainer),
+               params: { user_id: stranger.id, access_level: Member::DEVELOPER, expires_at: expires_at }
+        end
+
+        context 'when set to a date in the past' do
+          let(:expires_at) { 2.days.ago.to_date }
+
+          it 'does not create a member' do
+            expect do
+              subject
+            end.not_to change { source.members.count }
+
+            expect(response).to have_gitlab_http_status(:bad_request)
+            expect(json_response['message']).to eq({ 'expires_at' => ['cannot be a date in the past'] })
+          end
+        end
+
+        context 'when set to a date in the future' do
+          let(:expires_at) { 2.days.from_now.to_date }
+
+          it 'creates a member' do
+            expect do
+              subject
+            end.to change { source.members.count }.by(1)
+
+            expect(response).to have_gitlab_http_status(:created)
+            expect(json_response['id']).to eq(stranger.id)
+            expect(json_response['expires_at']).to eq(expires_at.to_s)
+          end
+        end
+      end
+
       it "returns 409 if member already exists" do
         post api("/#{source_type.pluralize}/#{source.id}/members", maintainer),
              params: { user_id: maintainer.id, access_level: Member::MAINTAINER }
@@ -369,12 +402,40 @@ RSpec.describe API::Members do
       context 'when authenticated as a maintainer/owner' do
         it 'updates the member' do
           put api("/#{source_type.pluralize}/#{source.id}/members/#{developer.id}", maintainer),
-              params: { access_level: Member::MAINTAINER, expires_at: '2016-08-05' }
+              params: { access_level: Member::MAINTAINER }
 
           expect(response).to have_gitlab_http_status(:ok)
           expect(json_response['id']).to eq(developer.id)
           expect(json_response['access_level']).to eq(Member::MAINTAINER)
-          expect(json_response['expires_at']).to eq('2016-08-05')
+        end
+      end
+
+      context 'access expiry date' do
+        subject do
+          put api("/#{source_type.pluralize}/#{source.id}/members/#{developer.id}", maintainer),
+              params: { expires_at: expires_at, access_level: Member::MAINTAINER }
+        end
+
+        context 'when set to a date in the past' do
+          let(:expires_at) { 2.days.ago.to_date }
+
+          it 'does not update the member' do
+            subject
+
+            expect(response).to have_gitlab_http_status(:bad_request)
+            expect(json_response['message']).to eq({ 'expires_at' => ['cannot be a date in the past'] })
+          end
+        end
+
+        context 'when set to a date in the future' do
+          let(:expires_at) { 2.days.from_now.to_date }
+
+          it 'updates the member' do
+            subject
+
+            expect(response).to have_gitlab_http_status(:ok)
+            expect(json_response['expires_at']).to eq(expires_at.to_s)
+          end
         end
       end
 
diff --git a/spec/services/issues/create_service_spec.rb b/spec/services/issues/create_service_spec.rb
index fdf2326b75e..0a9e2fd1bcb 100644
--- a/spec/services/issues/create_service_spec.rb
+++ b/spec/services/issues/create_service_spec.rb
@@ -25,6 +25,7 @@ RSpec.describe Issues::CreateService do
           assignee_ids: [assignee.id],
           label_ids: labels.map(&:id),
           milestone_id: milestone.id,
+          milestone: milestone,
           due_date: Date.tomorrow }
       end
 
@@ -59,6 +60,12 @@ RSpec.describe Issues::CreateService do
           expect(issue.milestone).to be_nil
           expect(issue.due_date).to be_nil
         end
+
+        it 'creates confidential issues' do
+          issue = described_class.new(project, guest, confidential: true).execute
+
+          expect(issue.confidential).to be_truthy
+        end
       end
 
       it 'creates a pending todo for new assignee' do
diff --git a/spec/services/issues/update_service_spec.rb b/spec/services/issues/update_service_spec.rb
index 77bd540e22f..b115879a729 100644
--- a/spec/services/issues/update_service_spec.rb
+++ b/spec/services/issues/update_service_spec.rb
@@ -10,6 +10,7 @@ RSpec.describe Issues::UpdateService, :mailer do
   let_it_be(:project, reload: true) { create(:project, :repository, group: group) }
   let_it_be(:label) { create(:label, project: project) }
   let_it_be(:label2) { create(:label, project: project) }
+  let_it_be(:milestone) { create(:milestone, project: project) }
 
   let(:issue) do
     create(:issue, title: 'Old title',
@@ -52,7 +53,8 @@ RSpec.describe Issues::UpdateService, :mailer do
           state_event: 'close',
           label_ids: [label.id],
           due_date: Date.tomorrow,
-          discussion_locked: true
+          discussion_locked: true,
+          milestone_id: milestone.id
         }
       end
 
@@ -69,6 +71,14 @@ RSpec.describe Issues::UpdateService, :mailer do
         expect(issue.labels).to match_array [label]
         expect(issue.due_date).to eq Date.tomorrow
         expect(issue.discussion_locked).to be_truthy
+        expect(issue.confidential).to be_falsey
+        expect(issue.milestone).to eq milestone
+      end
+
+      it 'updates issue milestone when passing `milestone` param' do
+        update_issue(milestone: milestone)
+
+        expect(issue.milestone).to eq milestone
       end
 
       it 'refreshes the number of open issues when the issue is made confidential', :use_clean_rails_memory_store_caching do
@@ -82,6 +92,8 @@ RSpec.describe Issues::UpdateService, :mailer do
         expect(TodosDestroyer::ConfidentialIssueWorker).to receive(:perform_in).with(Todo::WAIT_FOR_DELETE, issue.id)
 
         update_issue(confidential: true)
+
+        expect(issue.confidential).to be_truthy
       end
 
       it 'does not enqueue ConfidentialIssueWorker when an issue is made non confidential' do
@@ -91,6 +103,8 @@ RSpec.describe Issues::UpdateService, :mailer do
         expect(TodosDestroyer::ConfidentialIssueWorker).not_to receive(:perform_in)
 
         update_issue(confidential: false)
+
+        expect(issue.confidential).to be_falsey
       end
 
       it 'updates open issue counter for assignees when issue is reassigned' do
@@ -157,7 +171,7 @@ RSpec.describe Issues::UpdateService, :mailer do
         end
 
         it 'filters out params that cannot be set without the :admin_issue permission' do
-          described_class.new(project, guest, opts).execute(issue)
+          described_class.new(project, guest, opts.merge(confidential: true)).execute(issue)
 
           expect(issue).to be_valid
           expect(issue.title).to eq 'New title'
@@ -167,6 +181,7 @@ RSpec.describe Issues::UpdateService, :mailer do
           expect(issue.milestone).to be_nil
           expect(issue.due_date).to be_nil
           expect(issue.discussion_locked).to be_falsey
+          expect(issue.confidential).to be_falsey
         end
       end
 
diff --git a/spec/services/merge_requests/update_service_spec.rb b/spec/services/merge_requests/update_service_spec.rb
index c3433c8c9d2..5cbfb92263f 100644
--- a/spec/services/merge_requests/update_service_spec.rb
+++ b/spec/services/merge_requests/update_service_spec.rb
@@ -6,12 +6,13 @@ RSpec.describe MergeRequests::UpdateService, :mailer do
   include ProjectForksHelper
 
   let(:group) { create(:group, :public) }
-  let(:project) { create(:project, :repository, group: group) }
+  let(:project) { create(:project, :private, :repository, group: group) }
   let(:user) { create(:user) }
   let(:user2) { create(:user) }
   let(:user3) { create(:user) }
   let(:label) { create(:label, project: project) }
   let(:label2) { create(:label) }
+  let(:milestone) { create(:milestone, project: project) }
 
   let(:merge_request) do
     create(:merge_request, :simple, title: 'Old title',
@@ -60,7 +61,8 @@ RSpec.describe MergeRequests::UpdateService, :mailer do
         }
       end
 
-      let(:service) { described_class.new(project, user, opts) }
+      let(:service) { described_class.new(project, current_user, opts) }
+      let(:current_user) { user }
 
       before do
         allow(service).to receive(:execute_hooks)
@@ -83,6 +85,26 @@ RSpec.describe MergeRequests::UpdateService, :mailer do
         expect(@merge_request.discussion_locked).to be_truthy
       end
 
+      context 'updating milestone' do
+        RSpec.shared_examples 'updates milestone' do
+          it 'sets milestone' do
+            expect(@merge_request.milestone).to eq milestone
+          end
+        end
+
+        context 'when milestone_id param' do
+          let(:opts) { { milestone_id: milestone.id } }
+
+          it_behaves_like 'updates milestone'
+        end
+
+        context 'when milestone param' do
+          let(:opts) { { milestone: milestone } }
+
+          it_behaves_like 'updates milestone'
+        end
+      end
+
       it 'executes hooks with update action' do
         expect(service).to have_received(:execute_hooks)
           .with(
@@ -150,6 +172,46 @@ RSpec.describe MergeRequests::UpdateService, :mailer do
         expect(note.note).to eq 'locked this merge request'
       end
 
+      context 'when current user cannot admin issues in the project' do
+        let(:guest) { create(:user) }
+        let(:current_user) { guest }
+
+        before do
+          project.add_guest(guest)
+        end
+
+        it 'filters out params that cannot be set without the :admin_merge_request permission' do
+          expect(@merge_request).to be_valid
+          expect(@merge_request.title).to eq('New title')
+          expect(@merge_request.assignees).to match_array([user3])
+          expect(@merge_request).to be_opened
+          expect(@merge_request.labels.count).to eq(0)
+          expect(@merge_request.target_branch).to eq('target')
+          expect(@merge_request.discussion_locked).to be_falsey
+          expect(@merge_request.milestone).to be_nil
+        end
+
+        context 'updating milestone' do
+          RSpec.shared_examples 'does not update milestone' do
+            it 'sets milestone' do
+              expect(@merge_request.milestone).to be_nil
+            end
+          end
+
+          context 'when milestone_id param' do
+            let(:opts) { { milestone_id: milestone.id } }
+
+            it_behaves_like 'does not update milestone'
+          end
+
+          context 'when milestone param' do
+            let(:opts) { { milestone: milestone } }
+
+            it_behaves_like 'does not update milestone'
+          end
+        end
+      end
+
       context 'when not including source branch removal options' do
         before do
           opts.delete(:force_remove_source_branch)
diff --git a/spec/validators/future_date_validator_spec.rb b/spec/validators/future_date_validator_spec.rb
new file mode 100644
index 00000000000..6814ba7c820
--- /dev/null
+++ b/spec/validators/future_date_validator_spec.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe FutureDateValidator do
+  subject do
+    Class.new do
+      include ActiveModel::Model
+      include ActiveModel::Validations
+      attr_accessor :expires_at
+      validates :expires_at, future_date: true
+    end.new
+  end
+
+  before do
+    subject.expires_at = date
+  end
+
+  context 'past date' do
+    let(:date) { Date.yesterday }
+
+    it { is_expected.not_to be_valid }
+  end
+
+  context 'current date' do
+    let(:date) { Date.today }
+
+    it { is_expected.to be_valid }
+  end
+
+  context 'future date' do
+    let(:date) { Date.tomorrow }
+
+    it { is_expected.to be_valid }
+  end
+end
diff --git a/spec/workers/remove_expired_members_worker_spec.rb b/spec/workers/remove_expired_members_worker_spec.rb
index cbdd5a68698..8a34b41834b 100644
--- a/spec/workers/remove_expired_members_worker_spec.rb
+++ b/spec/workers/remove_expired_members_worker_spec.rb
@@ -7,9 +7,13 @@ RSpec.describe RemoveExpiredMembersWorker do
 
   describe '#perform' do
     context 'project members' do
-      let!(:expired_project_member) { create(:project_member, expires_at: 1.hour.ago, access_level: GroupMember::DEVELOPER) }
-      let!(:project_member_expiring_in_future) { create(:project_member, expires_at: 10.days.from_now, access_level: GroupMember::DEVELOPER) }
-      let!(:non_expiring_project_member) { create(:project_member, expires_at: nil, access_level: GroupMember::DEVELOPER) }
+      let_it_be(:expired_project_member) { create(:project_member, expires_at: 1.day.from_now, access_level: GroupMember::DEVELOPER) }
+      let_it_be(:project_member_expiring_in_future) { create(:project_member, expires_at: 10.days.from_now, access_level: GroupMember::DEVELOPER) }
+      let_it_be(:non_expiring_project_member) { create(:project_member, expires_at: nil, access_level: GroupMember::DEVELOPER) }
+
+      before do
+        travel_to(3.days.from_now)
+      end
 
       it 'removes expired members' do
         expect { worker.perform }.to change { Member.count }.by(-1)
@@ -28,9 +32,13 @@ RSpec.describe RemoveExpiredMembersWorker do
     end
 
     context 'group members' do
-      let!(:expired_group_member) { create(:group_member, expires_at: 1.hour.ago, access_level: GroupMember::DEVELOPER) }
-      let!(:group_member_expiring_in_future) { create(:group_member, expires_at: 10.days.from_now, access_level: GroupMember::DEVELOPER) }
-      let!(:non_expiring_group_member) { create(:group_member, expires_at: nil, access_level: GroupMember::DEVELOPER) }
+      let_it_be(:expired_group_member) { create(:group_member, expires_at: 1.day.from_now, access_level: GroupMember::DEVELOPER) }
+      let_it_be(:group_member_expiring_in_future) { create(:group_member, expires_at: 10.days.from_now, access_level: GroupMember::DEVELOPER) }
+      let_it_be(:non_expiring_group_member) { create(:group_member, expires_at: nil, access_level: GroupMember::DEVELOPER) }
+
+      before do
+        travel_to(3.days.from_now)
+      end
 
       it 'removes expired members' do
         expect { worker.perform }.to change { Member.count }.by(-1)
@@ -49,7 +57,11 @@ RSpec.describe RemoveExpiredMembersWorker do
     end
 
     context 'when the last group owner expires' do
-      let!(:expired_group_owner) { create(:group_member, expires_at: 1.hour.ago, access_level: GroupMember::OWNER) }
+      let_it_be(:expired_group_owner) { create(:group_member, expires_at: 1.day.from_now, access_level: GroupMember::OWNER) }
+
+      before do
+        travel_to(3.days.from_now)
+      end
 
       it 'does not delete the owner' do
         worker.perform