Merge branch 'bvl-10-2-email-disclosure' into 'security-10-2'

(10.2) Avoid partial partial email adresses for matching

See merge request gitlab/gitlabhq!2232

(cherry picked from commit 081aa1e91a777c9acb31be4a1e76b3dd7032fa9a)

There are unresolved conflicts in app/models/user.rb.

fa85a3fd Don't allow searching for partial user emails

app/models/user.rb

@@ -315,6 +315,13 @@ class User < ActiveRecord::Base
     #
     # Returns an ActiveRecord::Relation.
     def search(query)
+<<<<<<< HEAD
+=======
+      table = arel_table
+      query = query.downcase
+      pattern = User.to_pattern(query)
+
+>>>>>>> f45fc58d84... Merge branch 'bvl-10-2-email-disclosure' into 'security-10-2'
       order = <<~SQL
         CASE
           WHEN users.name = %{query} THEN 0
@@ -324,8 +331,16 @@ class User < ActiveRecord::Base
         END
       SQL
 
+<<<<<<< HEAD
       fuzzy_search(query, [:name, :email, :username])
         .reorder(order % { query: ActiveRecord::Base.connection.quote(query) }, :name)
+=======
+      where(
+        table[:name].matches(pattern)
+          .or(table[:email].eq(query))
+          .or(table[:username].matches(pattern))
+      ).reorder(order % { query: ActiveRecord::Base.connection.quote(query) }, :name)
+>>>>>>> f45fc58d84... Merge branch 'bvl-10-2-email-disclosure' into 'security-10-2'
     end
 
     # searches user by given pattern
@@ -334,6 +349,7 @@ class User < ActiveRecord::Base
 
     def search_with_secondary_emails(query)
       email_table = Email.arel_table
+<<<<<<< HEAD
       matched_by_emails_user_ids = email_table
         .project(email_table[:user_id])
         .where(Email.fuzzy_arel_match(:email, query))
@@ -343,6 +359,17 @@ class User < ActiveRecord::Base
           .or(fuzzy_arel_match(:email, query))
           .or(fuzzy_arel_match(:username, query))
           .or(arel_table[:id].in(matched_by_emails_user_ids))
+=======
+      query = query.downcase
+      pattern = User.to_pattern(query)
+      matched_by_emails_user_ids = email_table.project(email_table[:user_id]).where(email_table[:email].eq(query))
+
+      where(
+        table[:name].matches(pattern)
+          .or(table[:email].eq(query))
+          .or(table[:username].matches(pattern))
+          .or(table[:id].in(matched_by_emails_user_ids))
+>>>>>>> f45fc58d84... Merge branch 'bvl-10-2-email-disclosure' into 'security-10-2'
       )
     end
 

changelogs/unreleased/bvl-email-disclosure.yml

+---
+title: Don't match partial email adresses
+merge_request: 2227
+author:
+type: security

spec/features/groups/members/manage_members.rb

@@ -38,6 +38,27 @@ feature 'Groups > Members > Manage members' do
     end
   end
 
+  scenario 'do not disclose email addresses', :js do
+    group.add_owner(user1)
+    create(:user, email: 'undisclosed_email@gitlab.com', name: "Jane 'invisible' Doe")
+
+    visit group_group_members_path(group)
+
+    find('.select2-container').click
+    select_input = find('.select2-input')
+
+    select_input.send_keys('@gitlab.com')
+    wait_for_requests
+
+    expect(page).to have_content('No matches found')
+
+    select_input.native.clear
+    select_input.send_keys('undisclosed_email@gitlab.com')
+    wait_for_requests
+
+    expect(page).to have_content("Jane 'invisible' Doe")
+  end
+
   scenario 'remove user from group', :js do
     group.add_owner(user1)
     group.add_developer(user2)

spec/models/user_spec.rb

@@ -913,11 +913,11 @@ describe User do
 
     describe 'email matching' do
       it 'returns users with a matching Email' do
-        expect(described_class.search(user.email)).to eq([user, user2])
+        expect(described_class.search(user.email)).to eq([user])
       end
 
-      it 'returns users with a partially matching Email' do
-        expect(described_class.search(user.email[0..2])).to eq([user, user2])
+      it 'does not return users with a partially matching Email' do
+        expect(described_class.search(user.email[0..2])).not_to include(user, user2)
       end
 
       it 'returns users with a matching Email regardless of the casing' do
@@ -973,8 +973,8 @@ describe User do
       expect(search_with_secondary_emails(user.email)).to eq([user])
     end
 
-    it 'returns users with a partially matching email' do
-      expect(search_with_secondary_emails(user.email[0..2])).to eq([user])
+    it 'does not return users with a partially matching email' do
+      expect(search_with_secondary_emails(user.email[0..2])).not_to include([user])
     end
 
     it 'returns users with a matching email regardless of the casing' do
@@ -997,29 +997,8 @@ describe User do
       expect(search_with_secondary_emails(email.email)).to eq([email.user])
     end
 
-    it 'returns users with a matching part of secondary email' do
-      expect(search_with_secondary_emails(email.email[1..4])).to eq([email.user])
-    end
-
-    it 'return users with a matching part of secondary email regardless of case' do
-      expect(search_with_secondary_emails(email.email[1..4].upcase)).to eq([email.user])
-      expect(search_with_secondary_emails(email.email[1..4].downcase)).to eq([email.user])
-      expect(search_with_secondary_emails(email.email[1..4].capitalize)).to eq([email.user])
-    end
-
-    it 'returns multiple users with matching secondary emails' do
-      email1 = create(:email, email: '1_testemail@example.com')
-      email2 = create(:email, email: '2_testemail@example.com')
-      email3 = create(:email, email: 'other@email.com')
-      email3.user.update_attributes!(email: 'another@mail.com')
-
-      expect(
-        search_with_secondary_emails('testemail@example.com').map(&:id)
-      ).to include(email1.user.id, email2.user.id)
-
-      expect(
-        search_with_secondary_emails('testemail@example.com').map(&:id)
-      ).not_to include(email3.user.id)
+    it 'does not return users with a matching part of secondary email' do
+      expect(search_with_secondary_emails(email.email[1..4])).not_to include([email.user])
     end
   end