Merge pull request from GHSA-3fjr-858r-92rw

* Fix insufficient origin validation

* Bump version to v3.5.17

CHANGELOG.md

@@ -5,9 +5,15 @@ All notable changes to this project will be documented in this file.
 
 ## End of life notice
 
-**The 3.5.x branch will not receive any update after 2023-12-31.**
+**The 3.5.x branch has reached its end of life and will not receive any further update.**
 This means that no security fix will be made available for this branch after this date, and you will need to update to a more recent version (such as the 4.2.x branch) to receive security fixes.
 
+## [3.5.17] - 2024-02-01
+
+### Security
+
+- Fix insufficient origin validation (CVE-2024-23832, [GHSA-3fjr-858r-92rw](https://github.com/mastodon/mastodon/security/advisories/GHSA-3fjr-858r-92rw))
+
 ## [3.5.16] - 2023-12-04
 
 ### Changed

SECURITY.md

@@ -15,5 +15,5 @@ A "vulnerability in Mastodon" is a vulnerability in the code distributed through
 | 4.2.x   | Yes              |
 | 4.1.x   | Yes              |
 | 4.0.x   | No               |
-| 3.5.x   | Until 2023-12-31 |
+| 3.5.x   | No               |
 | < 3.5   | No               |

app/controllers/concerns/signature_verification.rb

@@ -219,7 +219,7 @@ module SignatureVerification
       stoplight_wrap_request { ResolveAccountService.new.call(key_id.gsub(/\Aacct:/, '')) }
     elsif !ActivityPub::TagManager.instance.local_uri?(key_id)
       account   = ActivityPub::TagManager.instance.uri_to_resource(key_id, Account)
-      account ||= stoplight_wrap_request { ActivityPub::FetchRemoteKeyService.new.call(key_id, id: false) }
+      account ||= stoplight_wrap_request { ActivityPub::FetchRemoteKeyService.new.call(key_id) }
       account
     end
   rescue Mastodon::HostValidationError

app/helpers/jsonld_helper.rb

@@ -157,8 +157,8 @@ module JsonLdHelper
     end
   end
 
-  def fetch_resource(uri, id, on_behalf_of = nil)
+  def fetch_resource(uri, id_is_known, on_behalf_of = nil)
-    unless id
+    unless id_is_known
       json = fetch_resource_without_id_validation(uri, on_behalf_of)
 
       return if !json.is_a?(Hash) || unsupported_uri_scheme?(json['id'])

app/lib/activitypub/activity.rb

@@ -153,7 +153,8 @@ class ActivityPub::Activity
   def fetch_remote_original_status
     if object_uri.start_with?('http')
       return if ActivityPub::TagManager.instance.local_uri?(object_uri)
-      ActivityPub::FetchRemoteStatusService.new.call(object_uri, id: true, on_behalf_of: @account.followers.local.first, request_id: @options[:request_id])
+
+      ActivityPub::FetchRemoteStatusService.new.call(object_uri, on_behalf_of: @account.followers.local.first, request_id: @options[:request_id])
     elsif @object['url'].present?
       ::FetchRemoteStatusService.new.call(@object['url'], request_id: @options[:request_id])
     end

app/lib/activitypub/linked_data_signature.rb

@@ -19,7 +19,7 @@ class ActivityPub::LinkedDataSignature
     return unless type == 'RsaSignature2017'
 
     creator = ActivityPub::TagManager.instance.uri_to_resource(creator_uri, Account)
-    creator = ActivityPub::FetchRemoteKeyService.new.call(creator_uri, id: false) if creator&.public_key.blank?
+    creator = ActivityPub::FetchRemoteKeyService.new.call(creator_uri) if creator&.public_key.blank?
 
     return if creator.nil?
 

app/services/activitypub/fetch_remote_account_service.rb

@@ -8,15 +8,15 @@ class ActivityPub::FetchRemoteAccountService < BaseService
   SUPPORTED_TYPES = %w(Application Group Organization Person Service).freeze
 
   # Does a WebFinger roundtrip on each call, unless `only_key` is true
-  def call(uri, id: true, prefetched_body: nil, break_on_redirect: false, only_key: false, request_id: nil)
+  def call(uri, prefetched_body: nil, break_on_redirect: false, only_key: false, request_id: nil)
     return if domain_not_allowed?(uri)
     return ActivityPub::TagManager.instance.uri_to_resource(uri, Account) if ActivityPub::TagManager.instance.local_uri?(uri)
 
     @json = begin
       if prefetched_body.nil?
-        fetch_resource(uri, id)
+        fetch_resource(uri, true)
       else
-        body_to_json(prefetched_body, compare_id: id ? uri : nil)
+        body_to_json(prefetched_body, compare_id: uri)
       end
     end
 

app/services/activitypub/fetch_remote_key_service.rb

@@ -4,23 +4,10 @@ class ActivityPub::FetchRemoteKeyService < BaseService
   include JsonLdHelper
 
   # Returns account that owns the key
-  def call(uri, id: true, prefetched_body: nil)
+  def call(uri)
     return if uri.blank?
 
-    if prefetched_body.nil?
+    @json = fetch_resource(uri, false)
-      if id
-        @json = fetch_resource_without_id_validation(uri)
-        if person?
-          @json = fetch_resource(@json['id'], true)
-        elsif uri != @json['id']
-          return
-        end
-      else
-        @json = fetch_resource(uri, id)
-      end
-    else
-      @json = body_to_json(prefetched_body, compare_id: id ? uri : nil)
-    end
 
     return unless supported_context?(@json) && expected_type?
     return find_account(@json['id'], @json) if person?

app/services/activitypub/fetch_remote_status_service.rb

@@ -7,13 +7,13 @@ class ActivityPub::FetchRemoteStatusService < BaseService
   DISCOVERIES_PER_REQUEST = 1000
 
   # Should be called when uri has already been checked for locality
-  def call(uri, id: true, prefetched_body: nil, on_behalf_of: nil, expected_actor_uri: nil, request_id: nil)
+  def call(uri, prefetched_body: nil, on_behalf_of: nil, expected_actor_uri: nil, request_id: nil)
     @request_id = request_id || "#{Time.now.utc.to_i}-status-#{uri}"
     @json = begin
       if prefetched_body.nil?
-        fetch_resource(uri, id, on_behalf_of)
+        fetch_resource(uri, true, on_behalf_of)
       else
-        body_to_json(prefetched_body, compare_id: id ? uri : nil)
+        body_to_json(prefetched_body, compare_id: uri)
       end
     end
 
@@ -63,7 +63,7 @@ class ActivityPub::FetchRemoteStatusService < BaseService
 
   def account_from_uri(uri)
     actor = ActivityPub::TagManager.instance.uri_to_resource(uri, Account)
-    actor = ActivityPub::FetchRemoteAccountService.new.call(uri, id: true, request_id: @request_id) if actor.nil? || actor.possibly_stale?
+    actor = ActivityPub::FetchRemoteAccountService.new.call(uri, request_id: @request_id) if actor.nil? || actor.possibly_stale?
     actor
   end
 

app/services/activitypub/process_account_service.rb

@@ -269,7 +269,7 @@ class ActivityPub::ProcessAccountService < BaseService
 
   def moved_account
     account   = ActivityPub::TagManager.instance.uri_to_resource(@json['movedTo'], Account)
-    account ||= ActivityPub::FetchRemoteAccountService.new.call(@json['movedTo'], id: true, break_on_redirect: true, request_id: @options[:request_id])
+    account ||= ActivityPub::FetchRemoteAccountService.new.call(@json['movedTo'], break_on_redirect: true, request_id: @options[:request_id])
     account
   end
 

app/services/fetch_resource_service.rb

@@ -47,7 +47,15 @@ class FetchResourceService < BaseService
       body = response.body_with_limit
       json = body_to_json(body)
 
-      [json['id'], { prefetched_body: body, id: true }] if supported_context?(json) && (equals_or_includes_any?(json['type'], ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES) || expected_type?(json))
+      return unless supported_context?(json) && (equals_or_includes_any?(json['type'], ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES) || expected_type?(json))
+
+      if json['id'] != @url
+        return if terminal
+
+        return process(json['id'], terminal: true)
+      end
+
+      [@url, { prefetched_body: body }]
     elsif !terminal
       link_header = response['Link'] && parse_link_header(response)
 

docker-compose.yml

@@ -44,7 +44,7 @@ services:
 
   web:
     build: .
-    image: ghcr.io/mastodon/mastodon:v3.5.16
+    image: ghcr.io/mastodon/mastodon:v3.5.17
     restart: always
     env_file: .env.production
     command: bash -c "rm -f /mastodon/tmp/pids/server.pid; bundle exec rails s -p 3000"
@@ -65,7 +65,7 @@ services:
 
   streaming:
     build: .
-    image: ghcr.io/mastodon/mastodon:v3.5.16
+    image: ghcr.io/mastodon/mastodon:v3.5.17
     restart: always
     env_file: .env.production
     command: node ./streaming
@@ -83,7 +83,7 @@ services:
 
   sidekiq:
     build: .
-    image: ghcr.io/mastodon/mastodon:v3.5.16
+    image: ghcr.io/mastodon/mastodon:v3.5.17
     restart: always
     env_file: .env.production
     command: bundle exec sidekiq

lib/mastodon/version.rb

@@ -13,7 +13,7 @@ module Mastodon
     end
 
     def patch
-      16
+      17
     end
 
     def flags

spec/lib/activitypub/linked_data_signature_spec.rb

@@ -58,7 +58,7 @@ RSpec.describe ActivityPub::LinkedDataSignature do
 
         allow(ActivityPub::FetchRemoteKeyService).to receive(:new).and_return(service_stub)
 
-        allow(service_stub).to receive(:call).with('http://example.com/alice', id: false) do
+        allow(service_stub).to receive(:call).with('http://example.com/alice') do
           sender.update!(public_key: old_key)
           sender
         end
@@ -66,7 +66,7 @@ RSpec.describe ActivityPub::LinkedDataSignature do
 
       it 'fetches key and returns creator' do
         expect(subject.verify_account!).to eq sender
-        expect(service_stub).to have_received(:call).with('http://example.com/alice', id: false).once
+        expect(service_stub).to have_received(:call).with('http://example.com/alice').once
       end
     end
 

spec/services/activitypub/fetch_remote_account_service_spec.rb

@@ -16,7 +16,7 @@ RSpec.describe ActivityPub::FetchRemoteAccountService, type: :service do
   end
 
   describe '#call' do
-    let(:account) { subject.call('https://example.com/alice', id: true) }
+    let(:account) { subject.call('https://example.com/alice') }
 
     shared_examples 'sets profile data' do
       it 'returns an account' do

spec/services/fetch_resource_service_spec.rb

@@ -54,7 +54,7 @@ RSpec.describe FetchResourceService, type: :service do
 
       let(:json) do
         {
-          id: 1,
+          id: 'http://example.com/foo',
           '@context': ActivityPub::TagManager::CONTEXT,
           type: 'Note',
         }.to_json
@@ -79,14 +79,14 @@ RSpec.describe FetchResourceService, type: :service do
         let(:content_type) { 'application/activity+json; charset=utf-8' }
         let(:body) { json }
 
-        it { is_expected.to eq [1, { prefetched_body: body, id: true }] }
+        it { is_expected.to eq ['http://example.com/foo', { prefetched_body: body }] }
       end
 
       context 'when content type is ld+json with profile' do
         let(:content_type) { 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"' }
         let(:body) { json }
 
-        it { is_expected.to eq [1, { prefetched_body: body, id: true }] }
+        it { is_expected.to eq ['http://example.com/foo', { prefetched_body: body }] }
       end
 
       before do
@@ -97,14 +97,14 @@ RSpec.describe FetchResourceService, type: :service do
       context 'when link header is present' do
         let(:headers) { { 'Link' => '<http://example.com/foo>; rel="alternate"; type="application/activity+json"', } }
 
-        it { is_expected.to eq [1, { prefetched_body: json, id: true }] }
+        it { is_expected.to eq ['http://example.com/foo', { prefetched_body: json }] }
       end
 
       context 'when content type is text/html' do
         let(:content_type) { 'text/html' }
         let(:body) { '<html><head><link rel="alternate" href="http://example.com/foo" type="application/activity+json"/></head></html>' }
 
-        it { is_expected.to eq [1, { prefetched_body: json, id: true }] }
+        it { is_expected.to eq ['http://example.com/foo', { prefetched_body: json }] }
       end
     end
   end

spec/services/resolve_url_service_spec.rb

@@ -139,6 +139,7 @@ describe ResolveURLService, type: :service do
         stub_request(:get, url).to_return(status: 302, headers: { 'Location' => status_url })
         body = ActiveModelSerializers::SerializableResource.new(status, serializer: ActivityPub::NoteSerializer, adapter: ActivityPub::Adapter).to_json
         stub_request(:get, status_url).to_return(body: body, headers: { 'Content-Type' => 'application/activity+json' })
+        stub_request(:get, uri).to_return(body: body, headers: { 'Content-Type' => 'application/activity+json' })
       end
 
       it 'returns status by url' do