From 63da32468cf5f5145deb51c93019009a6ef7f8db Mon Sep 17 00:00:00 2001 From: Puck Meerburg Date: Sat, 22 Jan 2022 13:48:27 +0000 Subject: [PATCH 1/4] Compact JSON-LD signed incoming activities --- app/helpers/context_helper.rb | 55 +++++++++++++++++++ app/helpers/jsonld_helper.rb | 8 +++ app/lib/activitypub/adapter.rb | 52 +----------------- .../activitypub/process_collection_service.rb | 2 + 4 files changed, 67 insertions(+), 50 deletions(-) create mode 100644 app/helpers/context_helper.rb diff --git a/app/helpers/context_helper.rb b/app/helpers/context_helper.rb new file mode 100644 index 0000000000..2f5fecaae8 --- /dev/null +++ b/app/helpers/context_helper.rb @@ -0,0 +1,55 @@ +# frozen_string_literal: true + +module ContextHelper + NAMED_CONTEXT_MAP = { + activitystreams: 'https://www.w3.org/ns/activitystreams', + security: 'https://w3id.org/security/v1', + }.freeze + + CONTEXT_EXTENSION_MAP = { + direct_message: { 'litepub' => 'http://litepub.social/ns#', 'directMessage' => 'litepub:directMessage' }, + manually_approves_followers: { 'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers' }, + sensitive: { 'sensitive' => 'as:sensitive' }, + hashtag: { 'Hashtag' => 'as:Hashtag' }, + moved_to: { 'movedTo' => { '@id' => 'as:movedTo', '@type' => '@id' } }, + also_known_as: { 'alsoKnownAs' => { '@id' => 'as:alsoKnownAs', '@type' => '@id' } }, + emoji: { 'toot' => 'http://joinmastodon.org/ns#', 'Emoji' => 'toot:Emoji' }, + featured: { 'toot' => 'http://joinmastodon.org/ns#', 'featured' => { '@id' => 'toot:featured', '@type' => '@id' }, 'featuredTags' => { '@id' => 'toot:featuredTags', '@type' => '@id' } }, + property_value: { 'schema' => 'http://schema.org#', 'PropertyValue' => 'schema:PropertyValue', 'value' => 'schema:value' }, + atom_uri: { 'ostatus' => 'http://ostatus.org#', 'atomUri' => 'ostatus:atomUri' }, + conversation: { 'ostatus' => 'http://ostatus.org#', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri', 'conversation' => 'ostatus:conversation' }, + focal_point: { 'toot' => 'http://joinmastodon.org/ns#', 'focalPoint' => { '@container' => '@list', '@id' => 'toot:focalPoint' } }, + blurhash: { 'toot' => 'http://joinmastodon.org/ns#', 'blurhash' => 'toot:blurhash' }, + discoverable: { 'toot' => 'http://joinmastodon.org/ns#', 'discoverable' => 'toot:discoverable' }, + voters_count: { 'toot' => 'http://joinmastodon.org/ns#', 'votersCount' => 'toot:votersCount' }, + olm: { 'toot' => 'http://joinmastodon.org/ns#', 'Device' => 'toot:Device', 'Ed25519Signature' => 'toot:Ed25519Signature', 'Ed25519Key' => 'toot:Ed25519Key', 'Curve25519Key' => 'toot:Curve25519Key', 'EncryptedMessage' => 'toot:EncryptedMessage', 'publicKeyBase64' => 'toot:publicKeyBase64', 'deviceId' => 'toot:deviceId', 'claim' => { '@type' => '@id', '@id' => 'toot:claim' }, 'fingerprintKey' => { '@type' => '@id', '@id' => 'toot:fingerprintKey' }, 'identityKey' => { '@type' => '@id', '@id' => 'toot:identityKey' }, 'devices' => { '@type' => '@id', '@id' => 'toot:devices' }, 'messageFranking' => 'toot:messageFranking', 'messageType' => 'toot:messageType', 'cipherText' => 'toot:cipherText' }, + suspended: { 'toot' => 'http://joinmastodon.org/ns#', 'suspended' => 'toot:suspended' }, + }.freeze + + def full_context + serialized_context(NAMED_CONTEXT_MAP, CONTEXT_EXTENSION_MAP) + end + + def serialized_context(named_contexts_map, context_extensions_map) + context_array = [] + + named_contexts = named_contexts_map.keys + context_extensions = context_extensions_map.keys + + named_contexts.each do |key| + context_array << NAMED_CONTEXT_MAP[key] + end + + extensions = context_extensions.each_with_object({}) do |key, h| + h.merge!(CONTEXT_EXTENSION_MAP[key]) + end + + context_array << extensions unless extensions.empty? + + if context_array.size == 1 + context_array.first + else + context_array + end + end +end diff --git a/app/helpers/jsonld_helper.rb b/app/helpers/jsonld_helper.rb index c24d2ddf10..841f277467 100644 --- a/app/helpers/jsonld_helper.rb +++ b/app/helpers/jsonld_helper.rb @@ -1,6 +1,8 @@ # frozen_string_literal: true module JsonLdHelper + include ContextHelper + def equals_or_includes?(haystack, needle) haystack.is_a?(Array) ? haystack.include?(needle) : haystack == needle end @@ -69,6 +71,12 @@ module JsonLdHelper graph.dump(:normalize) end + def compact(json) + compacted = JSON::LD::API.compact(json.without('signature'), full_context, documentLoader: method(:load_jsonld_context)) + compacted['signature'] = json['signature'] + compacted + end + def fetch_resource(uri, id, on_behalf_of = nil) unless id json = fetch_resource_without_id_validation(uri, on_behalf_of) diff --git a/app/lib/activitypub/adapter.rb b/app/lib/activitypub/adapter.rb index d8b0c63b25..098b6296fb 100644 --- a/app/lib/activitypub/adapter.rb +++ b/app/lib/activitypub/adapter.rb @@ -1,30 +1,7 @@ # frozen_string_literal: true class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base - NAMED_CONTEXT_MAP = { - activitystreams: 'https://www.w3.org/ns/activitystreams', - security: 'https://w3id.org/security/v1', - }.freeze - - CONTEXT_EXTENSION_MAP = { - direct_message: { 'litepub': 'http://litepub.social/ns#', 'directMessage': 'litepub:directMessage' }, - manually_approves_followers: { 'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers' }, - sensitive: { 'sensitive' => 'as:sensitive' }, - hashtag: { 'Hashtag' => 'as:Hashtag' }, - moved_to: { 'movedTo' => { '@id' => 'as:movedTo', '@type' => '@id' } }, - also_known_as: { 'alsoKnownAs' => { '@id' => 'as:alsoKnownAs', '@type' => '@id' } }, - emoji: { 'toot' => 'http://joinmastodon.org/ns#', 'Emoji' => 'toot:Emoji' }, - featured: { 'toot' => 'http://joinmastodon.org/ns#', 'featured' => { '@id' => 'toot:featured', '@type' => '@id' }, 'featuredTags' => { '@id' => 'toot:featuredTags', '@type' => '@id' } }, - property_value: { 'schema' => 'http://schema.org#', 'PropertyValue' => 'schema:PropertyValue', 'value' => 'schema:value' }, - atom_uri: { 'ostatus' => 'http://ostatus.org#', 'atomUri' => 'ostatus:atomUri' }, - conversation: { 'ostatus' => 'http://ostatus.org#', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri', 'conversation' => 'ostatus:conversation' }, - focal_point: { 'toot' => 'http://joinmastodon.org/ns#', 'focalPoint' => { '@container' => '@list', '@id' => 'toot:focalPoint' } }, - blurhash: { 'toot' => 'http://joinmastodon.org/ns#', 'blurhash' => 'toot:blurhash' }, - discoverable: { 'toot' => 'http://joinmastodon.org/ns#', 'discoverable' => 'toot:discoverable' }, - voters_count: { 'toot' => 'http://joinmastodon.org/ns#', 'votersCount' => 'toot:votersCount' }, - olm: { 'toot' => 'http://joinmastodon.org/ns#', 'Device' => 'toot:Device', 'Ed25519Signature' => 'toot:Ed25519Signature', 'Ed25519Key' => 'toot:Ed25519Key', 'Curve25519Key' => 'toot:Curve25519Key', 'EncryptedMessage' => 'toot:EncryptedMessage', 'publicKeyBase64' => 'toot:publicKeyBase64', 'deviceId' => 'toot:deviceId', 'claim' => { '@type' => '@id', '@id' => 'toot:claim' }, 'fingerprintKey' => { '@type' => '@id', '@id' => 'toot:fingerprintKey' }, 'identityKey' => { '@type' => '@id', '@id' => 'toot:identityKey' }, 'devices' => { '@type' => '@id', '@id' => 'toot:devices' }, 'messageFranking' => 'toot:messageFranking', 'messageType' => 'toot:messageType', 'cipherText' => 'toot:cipherText' }, - suspended: { 'toot' => 'http://joinmastodon.org/ns#', 'suspended' => 'toot:suspended' }, - }.freeze + include ContextHelper def self.default_key_transform :camel_lower @@ -35,7 +12,7 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base end def serializable_hash(options = nil) - named_contexts = {} + named_contexts = { activitystreams: NAMED_CONTEXT_MAP['activitystreams'] } context_extensions = {} options = serialization_options(options) @@ -45,29 +22,4 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base { '@context' => serialized_context(named_contexts, context_extensions) }.merge(serialized_hash) end - - private - - def serialized_context(named_contexts_map, context_extensions_map) - context_array = [] - - named_contexts = [:activitystreams] + named_contexts_map.keys - context_extensions = context_extensions_map.keys - - named_contexts.each do |key| - context_array << NAMED_CONTEXT_MAP[key] - end - - extensions = context_extensions.each_with_object({}) do |key, h| - h.merge!(CONTEXT_EXTENSION_MAP[key]) - end - - context_array << extensions unless extensions.empty? - - if context_array.size == 1 - context_array.first - else - context_array - end - end end diff --git a/app/services/activitypub/process_collection_service.rb b/app/services/activitypub/process_collection_service.rb index 170e6709cd..5f3d63bb39 100644 --- a/app/services/activitypub/process_collection_service.rb +++ b/app/services/activitypub/process_collection_service.rb @@ -8,6 +8,8 @@ class ActivityPub::ProcessCollectionService < BaseService @json = Oj.load(body, mode: :strict) @options = options + @json = compact(@json) if @json['signature'].is_a?(Hash) + return if !supported_context? || (different_actor? && verify_account!.nil?) || suspended_actor? || @account.local? case @json['type'] From 7b969436a0939f7091954fe8a6441476dded7d0e Mon Sep 17 00:00:00 2001 From: Claire Date: Wed, 2 Feb 2022 11:55:57 +0100 Subject: [PATCH 2/4] Fix compacted JSON-LD possibly causing compatibility issues on forwarding --- app/helpers/jsonld_helper.rb | 72 ++++++++++++++++ .../activitypub/process_collection_service.rb | 18 +++- spec/helpers/jsonld_helper_spec.rb | 82 +++++++++++++++++++ 3 files changed, 170 insertions(+), 2 deletions(-) diff --git a/app/helpers/jsonld_helper.rb b/app/helpers/jsonld_helper.rb index 841f277467..c6557817d0 100644 --- a/app/helpers/jsonld_helper.rb +++ b/app/helpers/jsonld_helper.rb @@ -77,6 +77,78 @@ module JsonLdHelper compacted end + # Patches a JSON-LD document to avoid compatibility issues on redistribution + # + # Since compacting a JSON-LD document against Mastodon's built-in vocabulary + # means other extension namespaces will be expanded, malformed JSON-LD + # attributes lost, and some values “unexpectedly” compacted this method + # patches the following likely sources of incompatibility: + # - 'https://www.w3.org/ns/activitystreams#Public' being compacted to + # 'as:Public' (for instance, pre-3.4.0 Mastodon does not understand + # 'as:Public') + # - single-item arrays being compacted to the item itself (`[foo]` being + # compacted to `foo`) + # + # It is not always possible for `patch_for_forwarding!` to produce a document + # deemed safe for forwarding. Use `safe_for_forwarding?` to check the status + # of the output document. + # + # @param original [Hash] The original JSON-LD document used as reference + # @param compacted [Hash] The compacted JSON-LD document to be patched + # @return [void] + def patch_for_forwarding!(original, compacted) + original.without('@context', 'signature').each do |key, value| + next if value.nil? || !compacted.key?(key) + + compacted_value = compacted[key] + if value.is_a?(Hash) && compacted_value.is_a?(Hash) + patch_for_forwarding!(value, compacted_value) + elsif value.is_a?(Array) + compacted_value = [compacted_value] unless compacted_value.is_a?(Array) + return if value.size != compacted_value.size + + compacted[key] = value.zip(compacted_value).map do |v, vc| + if v.is_a?(Hash) && vc.is_a?(Hash) + patch_for_forwarding!(v, vc) + vc + elsif v == 'https://www.w3.org/ns/activitystreams#Public' && vc == 'as:Public' + v + else + vc + end + end + elsif value == 'https://www.w3.org/ns/activitystreams#Public' && compacted_value == 'as:Public' + compacted[key] = value + end + end + end + + # Tests whether a JSON-LD compaction is deemed safe for redistribution, + # that is, if it doesn't change its meaning to consumers that do not actually + # handle JSON-LD, but rely on values being serialized in a certain way. + # + # See `patch_for_forwarding!` for details. + # + # @param original [Hash] The original JSON-LD document used as reference + # @param compacted [Hash] The compacted JSON-LD document to be patched + # @return [Boolean] Whether the patched document is deemed safe + def safe_for_forwarding?(original, compacted) + original.without('@context', 'signature').all? do |key, value| + compacted_value = compacted[key] + return false unless value.class == compacted_value.class + + if value.is_a?(Hash) + safe_for_forwarding?(value, compacted_value) + elsif value.is_a?(Array) + value.zip(compacted_value).all? do |v, vc| + v.is_a?(Hash) ? (vc.is_a?(Hash) && safe_for_forwarding?(v, vc)) : v == vc + end + else + value == compacted_value + end + end + end + def fetch_resource(uri, id, on_behalf_of = nil) unless id json = fetch_resource_without_id_validation(uri, on_behalf_of) diff --git a/app/services/activitypub/process_collection_service.rb b/app/services/activitypub/process_collection_service.rb index 5f3d63bb39..eb008c40a2 100644 --- a/app/services/activitypub/process_collection_service.rb +++ b/app/services/activitypub/process_collection_service.rb @@ -5,13 +5,27 @@ class ActivityPub::ProcessCollectionService < BaseService def call(body, account, **options) @account = account - @json = Oj.load(body, mode: :strict) + @json = original_json = Oj.load(body, mode: :strict) @options = options - @json = compact(@json) if @json['signature'].is_a?(Hash) + begin + @json = compact(@json) if @json['signature'].is_a?(Hash) + rescue JSON::LD::JsonLdError => e + Rails.logger.debug "Error when compacting JSON-LD document for #{value_or_id(@json['actor'])}: #{e.message}" + @json = original_json.without('signature') + end return if !supported_context? || (different_actor? && verify_account!.nil?) || suspended_actor? || @account.local? + if @json['signature'].present? + # We have verified the signature, but in the compaction step above, might + # have introduced incompatibilities with other servers that do not + # normalize the JSON-LD documents (for instance, previous Mastodon + # versions), so skip redistribution if we can't get a safe document. + patch_for_forwarding!(original_json, @json) + @json.delete('signature') unless safe_for_forwarding?(original_json, @json) + end + case @json['type'] when 'Collection', 'CollectionPage' process_items @json['items'] diff --git a/spec/helpers/jsonld_helper_spec.rb b/spec/helpers/jsonld_helper_spec.rb index 883a88b14d..744a14f260 100644 --- a/spec/helpers/jsonld_helper_spec.rb +++ b/spec/helpers/jsonld_helper_spec.rb @@ -89,4 +89,86 @@ describe JsonLdHelper do expect(fetch_resource_without_id_validation('https://host.test/')).to eq({}) end end + + context 'compaction and forwarding' do + let(:json) do + { + '@context' => [ + 'https://www.w3.org/ns/activitystreams', + 'https://w3id.org/security/v1', + { + 'obsolete' => 'http://ostatus.org#', + 'convo' => 'obsolete:conversation', + 'new' => 'https://obscure-unreleased-test.joinmastodon.org/#', + }, + ], + 'type' => 'Create', + 'to' => ['https://www.w3.org/ns/activitystreams#Public'], + 'object' => { + 'id' => 'https://example.com/status', + 'type' => 'Note', + 'inReplyTo' => nil, + 'convo' => 'https://example.com/conversation', + 'tag' => [ + { + 'type' => 'Mention', + 'href' => ['foo'], + } + ], + }, + 'signature' => { + 'type' => 'RsaSignature2017', + 'created' => '2022-02-02T12:00:00Z', + 'creator' => 'https://example.com/actor#main-key', + 'signatureValue' => 'some-sig', + }, + } + end + + describe '#compact' do + it 'properly compacts JSON-LD with alternative context definitions' do + expect(compact(json).dig('object', 'conversation')).to eq 'https://example.com/conversation' + end + + it 'compacts single-item arrays' do + expect(compact(json).dig('object', 'tag', 'href')).to eq 'foo' + end + + it 'compacts the activistreams Public collection' do + expect(compact(json)['to']).to eq 'as:Public' + end + + it 'properly copies signature' do + expect(compact(json)['signature']).to eq json['signature'] + end + end + + describe 'patch_for_forwarding!' do + it 'properly patches incompatibilities' do + json['object'].delete('convo') + compacted = compact(json) + patch_for_forwarding!(json, compacted) + expect(compacted['to']).to eq ['https://www.w3.org/ns/activitystreams#Public'] + expect(compacted.dig('object', 'tag', 0, 'href')).to eq ['foo'] + expect(safe_for_forwarding?(json, compacted)).to eq true + end + end + + describe 'safe_for_forwarding?' do + it 'deems a safe compacting as such' do + json['object'].delete('convo') + compacted = compact(json) + deemed_compatible = patch_for_forwarding!(json, compacted) + expect(compacted['to']).to eq ['https://www.w3.org/ns/activitystreams#Public'] + expect(safe_for_forwarding?(json, compacted)).to eq true + end + + it 'deems an unsafe compacting as such' do + compacted = compact(json) + deemed_compatible = patch_for_forwarding!(json, compacted) + expect(compacted['to']).to eq ['https://www.w3.org/ns/activitystreams#Public'] + expect(safe_for_forwarding?(json, compacted)).to eq false + end + end + end end From a3e0dacf5ce8f0865f0a767d67e587fda7b9af04 Mon Sep 17 00:00:00 2001 From: Claire Date: Mon, 6 Dec 2021 08:32:31 +0100 Subject: [PATCH 3/4] Fix response_to_recipient? CTE --- app/services/notify_service.rb | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/app/services/notify_service.rb b/app/services/notify_service.rb index 09e28b76b0..0f3516d28f 100644 --- a/app/services/notify_service.rb +++ b/app/services/notify_service.rb @@ -73,9 +73,11 @@ class NotifyService < BaseService # Using an SQL CTE to avoid unneeded back-and-forth with SQL server in case of long threads !Status.count_by_sql([<<-SQL.squish, id: @notification.target_status.in_reply_to_id, recipient_id: @recipient.id, sender_id: @notification.from_account.id]).zero? - WITH RECURSIVE ancestors(id, in_reply_to_id, replying_to_sender) AS ( + WITH RECURSIVE ancestors(id, in_reply_to_id, replying_to_sender, path) AS ( SELECT - s.id, s.in_reply_to_id, (CASE + s.id, + s.in_reply_to_id, + (CASE WHEN s.account_id = :recipient_id THEN EXISTS ( SELECT * @@ -84,7 +86,8 @@ class NotifyService < BaseService ) ELSE FALSE - END) + END), + ARRAY[s.id] FROM statuses s WHERE s.id = :id UNION ALL @@ -100,10 +103,11 @@ class NotifyService < BaseService ) ELSE FALSE - END) + END), + st.path || s.id FROM ancestors st JOIN statuses s ON s.id = st.in_reply_to_id - WHERE st.replying_to_sender IS FALSE + WHERE st.replying_to_sender IS FALSE AND NOT s.id = ANY(path) ) SELECT COUNT(*) FROM ancestors st From 2beb0a7af59c772f8b92872f9fa0e0c97963b8fb Mon Sep 17 00:00:00 2001 From: Claire Date: Wed, 2 Feb 2022 11:49:22 +0100 Subject: [PATCH 4/4] Bump version to 3.4.6 --- CHANGELOG.md | 12 ++++++++++++ chart/values.yaml | 2 +- lib/mastodon/version.rb | 2 +- 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 9deff5a0d1..c2eff7fa31 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -3,6 +3,18 @@ Changelog All notable changes to this project will be documented in this file. +## [3.4.6] - 2022-02-03 +### Fixed +- Fix `mastodon:webpush:generate_vapid_key` task requiring a functional environment ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17338)) +- Fix spurious errors when receiving an Add activity for a private post ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17425)) + +### Security +- Fix error-prone SQL queries ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/15828)) +- Fix not compacting incoming signed JSON-LD activities ([puckipedia](https://github.com/mastodon/mastodon/pull/17426), [ClearlyClaire](https://github.com/mastodon/mastodon/pull/17428)) (CVE-2022-24307) +- Fix insufficient sanitization of report comments ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17430)) +- Fix stop condition of a Common Table Expression ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17427)) +- Disable legacy XSS filtering ([Wonderfall](https://github.com/mastodon/mastodon/pull/17289)) + ## [3.4.5] - 2022-01-31 ### Added - Add more advanced migration tests ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17393)) diff --git a/chart/values.yaml b/chart/values.yaml index caac3eba09..dc476b1c51 100644 --- a/chart/values.yaml +++ b/chart/values.yaml @@ -8,7 +8,7 @@ image: # built from the most recent commit # # tag: latest - tag: v3.4.5 + tag: v3.4.6 # use `Always` when using `latest` tag pullPolicy: IfNotPresent diff --git a/lib/mastodon/version.rb b/lib/mastodon/version.rb index 15ab1867f4..7c2e7161ab 100644 --- a/lib/mastodon/version.rb +++ b/lib/mastodon/version.rb @@ -13,7 +13,7 @@ module Mastodon end def patch - 5 + 6 end def flags