From 7f951cf871ae497145096a8f248727e7c86894bc Mon Sep 17 00:00:00 2001 From: Claire Date: Mon, 29 Jan 2024 12:02:41 +0100 Subject: [PATCH] Fix insufficient origin validation --- .../concerns/signature_verification.rb | 2 +- app/helpers/jsonld_helper.rb | 4 ++-- app/lib/activitypub/activity.rb | 2 +- app/lib/activitypub/linked_data_signature.rb | 2 +- .../activitypub/fetch_remote_account_service.rb | 2 +- .../activitypub/fetch_remote_actor_service.rb | 6 +++--- .../activitypub/fetch_remote_key_service.rb | 17 ++--------------- .../activitypub/fetch_remote_status_service.rb | 8 ++++---- .../activitypub/process_account_service.rb | 2 +- app/services/fetch_resource_service.rb | 10 +++++++++- .../fetch_remote_account_service_spec.rb | 2 +- .../fetch_remote_actor_service_spec.rb | 2 +- .../fetch_remote_key_service_spec.rb | 2 +- spec/services/fetch_resource_service_spec.rb | 10 +++++----- spec/services/resolve_url_service_spec.rb | 1 + 15 files changed, 34 insertions(+), 38 deletions(-) diff --git a/app/controllers/concerns/signature_verification.rb b/app/controllers/concerns/signature_verification.rb index f0a344f1c9..6ad201cbdb 100644 --- a/app/controllers/concerns/signature_verification.rb +++ b/app/controllers/concerns/signature_verification.rb @@ -250,7 +250,7 @@ module SignatureVerification stoplight_wrap_request { ResolveAccountService.new.call(key_id.delete_prefix('acct:'), suppress_errors: false) } elsif !ActivityPub::TagManager.instance.local_uri?(key_id) account = ActivityPub::TagManager.instance.uri_to_actor(key_id) - account ||= stoplight_wrap_request { ActivityPub::FetchRemoteKeyService.new.call(key_id, id: false, suppress_errors: false) } + account ||= stoplight_wrap_request { ActivityPub::FetchRemoteKeyService.new.call(key_id, suppress_errors: false) } account end rescue Mastodon::PrivateNetworkAddressError => e diff --git a/app/helpers/jsonld_helper.rb b/app/helpers/jsonld_helper.rb index ce3ff094f6..1b840f566b 100644 --- a/app/helpers/jsonld_helper.rb +++ b/app/helpers/jsonld_helper.rb @@ -155,8 +155,8 @@ module JsonLdHelper end end - def fetch_resource(uri, id, on_behalf_of = nil) - unless id + def fetch_resource(uri, id_is_known, on_behalf_of = nil) + 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']) diff --git a/app/lib/activitypub/activity.rb b/app/lib/activitypub/activity.rb index 51384ef984..322f3e27ad 100644 --- a/app/lib/activitypub/activity.rb +++ b/app/lib/activitypub/activity.rb @@ -154,7 +154,7 @@ class ActivityPub::Activity 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 diff --git a/app/lib/activitypub/linked_data_signature.rb b/app/lib/activitypub/linked_data_signature.rb index ea59879f3b..8c029aad23 100644 --- a/app/lib/activitypub/linked_data_signature.rb +++ b/app/lib/activitypub/linked_data_signature.rb @@ -19,7 +19,7 @@ class ActivityPub::LinkedDataSignature return unless type == 'RsaSignature2017' creator = ActivityPub::TagManager.instance.uri_to_actor(creator_uri) - creator ||= ActivityPub::FetchRemoteKeyService.new.call(creator_uri, id: false) + creator ||= ActivityPub::FetchRemoteKeyService.new.call(creator_uri) return if creator.nil? diff --git a/app/services/activitypub/fetch_remote_account_service.rb b/app/services/activitypub/fetch_remote_account_service.rb index 567dd8a14a..7b083d889b 100644 --- a/app/services/activitypub/fetch_remote_account_service.rb +++ b/app/services/activitypub/fetch_remote_account_service.rb @@ -2,7 +2,7 @@ class ActivityPub::FetchRemoteAccountService < ActivityPub::FetchRemoteActorService # 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, suppress_errors: true, request_id: nil) + def call(uri, prefetched_body: nil, break_on_redirect: false, only_key: false, suppress_errors: true, request_id: nil) actor = super return actor if actor.nil? || actor.is_a?(Account) diff --git a/app/services/activitypub/fetch_remote_actor_service.rb b/app/services/activitypub/fetch_remote_actor_service.rb index 8df8c75876..86a134bb4e 100644 --- a/app/services/activitypub/fetch_remote_actor_service.rb +++ b/app/services/activitypub/fetch_remote_actor_service.rb @@ -10,15 +10,15 @@ class ActivityPub::FetchRemoteActorService < 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, suppress_errors: true, request_id: nil) + def call(uri, prefetched_body: nil, break_on_redirect: false, only_key: false, suppress_errors: true, request_id: nil) return if domain_not_allowed?(uri) return ActivityPub::TagManager.instance.uri_to_actor(uri) 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 rescue Oj::ParseError raise Error, "Error parsing JSON-LD document #{uri}" diff --git a/app/services/activitypub/fetch_remote_key_service.rb b/app/services/activitypub/fetch_remote_key_service.rb index 8eb97c1e66..e96b5ad3bb 100644 --- a/app/services/activitypub/fetch_remote_key_service.rb +++ b/app/services/activitypub/fetch_remote_key_service.rb @@ -6,23 +6,10 @@ class ActivityPub::FetchRemoteKeyService < BaseService class Error < StandardError; end # Returns actor that owns the key - def call(uri, id: true, prefetched_body: nil, suppress_errors: true) + def call(uri, suppress_errors: true) raise Error, 'No key URI given' if uri.blank? - if prefetched_body.nil? - if id - @json = fetch_resource_without_id_validation(uri) - if actor_type? - @json = fetch_resource(@json['id'], true) - elsif uri != @json['id'] - raise Error, "Fetched URI #{uri} has wrong id #{@json['id']}" - end - else - @json = fetch_resource(uri, id) - end - else - @json = body_to_json(prefetched_body, compare_id: id ? uri : nil) - end + @json = fetch_resource(uri, false) raise Error, "Unable to fetch key JSON at #{uri}" if @json.nil? raise Error, "Unsupported JSON-LD context for document #{uri}" unless supported_context?(@json) diff --git a/app/services/activitypub/fetch_remote_status_service.rb b/app/services/activitypub/fetch_remote_status_service.rb index a491b32b26..5a3eeeaf4e 100644 --- a/app/services/activitypub/fetch_remote_status_service.rb +++ b/app/services/activitypub/fetch_remote_status_service.rb @@ -8,14 +8,14 @@ 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) return if domain_not_allowed?(uri) @request_id = request_id || "#{Time.now.utc.to_i}-status-#{uri}" @json = 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 return unless supported_context? @@ -65,7 +65,7 @@ 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 diff --git a/app/services/activitypub/process_account_service.rb b/app/services/activitypub/process_account_service.rb index 1304ca8242..dc845ce97c 100644 --- a/app/services/activitypub/process_account_service.rb +++ b/app/services/activitypub/process_account_service.rb @@ -277,7 +277,7 @@ 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 diff --git a/app/services/fetch_resource_service.rb b/app/services/fetch_resource_service.rb index a3406e5a57..71c6cca790 100644 --- a/app/services/fetch_resource_service.rb +++ b/app/services/fetch_resource_service.rb @@ -48,7 +48,15 @@ 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::FetchRemoteActorService::SUPPORTED_TYPES) || expected_type?(json)) + return unless supported_context?(json) && (equals_or_includes_any?(json['type'], ActivityPub::FetchRemoteActorService::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) diff --git a/spec/services/activitypub/fetch_remote_account_service_spec.rb b/spec/services/activitypub/fetch_remote_account_service_spec.rb index ac7484d96d..f33a928da6 100644 --- a/spec/services/activitypub/fetch_remote_account_service_spec.rb +++ b/spec/services/activitypub/fetch_remote_account_service_spec.rb @@ -18,7 +18,7 @@ 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 diff --git a/spec/services/activitypub/fetch_remote_actor_service_spec.rb b/spec/services/activitypub/fetch_remote_actor_service_spec.rb index 93d31b69d5..944a2f8b1c 100644 --- a/spec/services/activitypub/fetch_remote_actor_service_spec.rb +++ b/spec/services/activitypub/fetch_remote_actor_service_spec.rb @@ -18,7 +18,7 @@ RSpec.describe ActivityPub::FetchRemoteActorService, 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 diff --git a/spec/services/activitypub/fetch_remote_key_service_spec.rb b/spec/services/activitypub/fetch_remote_key_service_spec.rb index e210d20ec7..0b14da4f44 100644 --- a/spec/services/activitypub/fetch_remote_key_service_spec.rb +++ b/spec/services/activitypub/fetch_remote_key_service_spec.rb @@ -55,7 +55,7 @@ RSpec.describe ActivityPub::FetchRemoteKeyService, type: :service do end describe '#call' do - let(:account) { subject.call(public_key_id, id: false) } + let(:account) { subject.call(public_key_id) } context 'when the key is a sub-object from the actor' do before do diff --git a/spec/services/fetch_resource_service_spec.rb b/spec/services/fetch_resource_service_spec.rb index 0f1068471f..78037a06ce 100644 --- a/spec/services/fetch_resource_service_spec.rb +++ b/spec/services/fetch_resource_service_spec.rb @@ -57,7 +57,7 @@ RSpec.describe FetchResourceService, type: :service do let(:json) do { - id: 1, + id: 'http://example.com/foo', '@context': ActivityPub::TagManager::CONTEXT, type: 'Note', }.to_json @@ -83,27 +83,27 @@ 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 context 'when link header is present' do let(:headers) { { 'Link' => '; 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) { '' } - 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 diff --git a/spec/services/resolve_url_service_spec.rb b/spec/services/resolve_url_service_spec.rb index 7991aa6ef1..38d35a3a18 100644 --- a/spec/services/resolve_url_service_spec.rb +++ b/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