diff --git a/CHANGELOG.md b/CHANGELOG.md index f5b75639d..7991b8196 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -3,6 +3,20 @@ All notable changes to this project will be documented in this file. The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/). +## [2.0.7] - 2020-06-13 + +### Security +- Fix potential DoSes exploiting atom leaks in rich media parser and the `UserAllowListPolicy` MRF policy + +### Fixed +- CSP: not allowing images/media from every host when mediaproxy is disabled +- CSP: not adding mediaproxy base url to image/media hosts +- StaticFE missing the CSS file + +### Upgrade notes + +1. Restart Pleroma + ## [2.0.6] - 2020-06-09 ### Security diff --git a/config/description.exs b/config/description.exs index 2623e3683..37cb548ff 100644 --- a/config/description.exs +++ b/config/description.exs @@ -1483,14 +1483,12 @@ # %{ # group: :pleroma, # key: :mrf_user_allowlist, - # type: :group, + # type: :map, # description: # "The keys in this section are the domain names that the policy should apply to." <> # " Each key should be assigned a list of users that should be allowed through by their ActivityPub ID", - # children: [ - # ["example.org": ["https://example.org/users/admin"]], # suggestions: [ - # ["example.org": ["https://example.org/users/admin"]] + # %{"example.org" => ["https://example.org/users/admin"]} # ] # ] # }, diff --git a/docs/configuration/cheatsheet.md b/docs/configuration/cheatsheet.md index 4012fe9b1..5d3f49401 100644 --- a/docs/configuration/cheatsheet.md +++ b/docs/configuration/cheatsheet.md @@ -133,8 +133,9 @@ their ActivityPub ID. An example: ```elixir -config :pleroma, :mrf_user_allowlist, - "example.org": ["https://example.org/users/admin"] +config :pleroma, :mrf_user_allowlist, %{ + "example.org" => ["https://example.org/users/admin"] +} ``` #### :mrf_object_age diff --git a/lib/pleroma/config/deprecation_warnings.ex b/lib/pleroma/config/deprecation_warnings.ex index c39a8984b..b68ded01f 100644 --- a/lib/pleroma/config/deprecation_warnings.ex +++ b/lib/pleroma/config/deprecation_warnings.ex @@ -4,9 +4,10 @@ defmodule Pleroma.Config.DeprecationWarnings do require Logger + alias Pleroma.Config def check_hellthread_threshold do - if Pleroma.Config.get([:mrf_hellthread, :threshold]) do + if Config.get([:mrf_hellthread, :threshold]) do Logger.warn(""" !!!DEPRECATION WARNING!!! You are using the old configuration mechanism for the hellthread filter. Please check config.md. @@ -14,7 +15,29 @@ def check_hellthread_threshold do end end + def mrf_user_allowlist do + config = Config.get(:mrf_user_allowlist) + + if config && Enum.any?(config, fn {k, _} -> is_atom(k) end) do + rewritten = + Enum.reduce(Config.get(:mrf_user_allowlist), Map.new(), fn {k, v}, acc -> + Map.put(acc, to_string(k), v) + end) + + Config.put(:mrf_user_allowlist, rewritten) + + Logger.error(""" + !!!DEPRECATION WARNING!!! + As of Pleroma 2.0.7, the `mrf_user_allowlist` setting changed of format. + Pleroma 2.1 will remove support for the old format. Please change your configuration to match this: + + config :pleroma, :mrf_user_allowlist, #{inspect(rewritten, pretty: true)} + """) + end + end + def warn do check_hellthread_threshold() + mrf_user_allowlist() end end diff --git a/lib/pleroma/constants.ex b/lib/pleroma/constants.ex index 4ba39b53f..3a9eec5ea 100644 --- a/lib/pleroma/constants.ex +++ b/lib/pleroma/constants.ex @@ -20,4 +20,9 @@ defmodule Pleroma.Constants do "deleted_activity_id" ] ) + + const(static_only_files, + do: + ~w(index.html robots.txt static static-fe finmoji emoji packs sounds images instance sw.js sw-pleroma.js favicon.png schemas doc) + ) end diff --git a/lib/pleroma/plugs/http_security_plug.ex b/lib/pleroma/plugs/http_security_plug.ex index 2208d1d6c..cad0ad4a0 100644 --- a/lib/pleroma/plugs/http_security_plug.ex +++ b/lib/pleroma/plugs/http_security_plug.ex @@ -75,7 +75,7 @@ defp csp_string do sources = get_proxy_and_attachment_sources() {[img_src, sources], [media_src, sources]} else - {img_src, media_src} + {[img_src, " https:"], [media_src, " https:"]} end connect_src = ["connect-src 'self' ", static_url, ?\s, websocket_url] @@ -113,6 +113,10 @@ defp get_proxy_and_attachment_sources do add_source(acc, host) end) + media_proxy_base_url = + if Config.get([:media_proxy, :base_url]), + do: URI.parse(Config.get([:media_proxy, :base_url])).host + upload_base_url = if Config.get([Pleroma.Upload, :base_url]), do: URI.parse(Config.get([Pleroma.Upload, :base_url])).host @@ -122,6 +126,7 @@ defp get_proxy_and_attachment_sources do do: URI.parse(Config.get([Pleroma.Uploaders.S3, :public_endpoint])).host [] + |> add_source(media_proxy_base_url) |> add_source(upload_base_url) |> add_source(s3_endpoint) |> add_source(media_proxy_whitelist) diff --git a/lib/pleroma/plugs/instance_static.ex b/lib/pleroma/plugs/instance_static.ex index 927fa2663..7516f75c3 100644 --- a/lib/pleroma/plugs/instance_static.ex +++ b/lib/pleroma/plugs/instance_static.ex @@ -3,6 +3,8 @@ # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Plugs.InstanceStatic do + require Pleroma.Constants + @moduledoc """ This is a shim to call `Plug.Static` but with runtime `from` configuration. @@ -21,9 +23,6 @@ def file_path(path) do end end - @only ~w(index.html robots.txt static emoji packs sounds images instance favicon.png sw.js - sw-pleroma.js) - def init(opts) do opts |> Keyword.put(:from, "__unconfigured_instance_static_plug") @@ -31,7 +30,7 @@ def init(opts) do |> Plug.Static.init() end - for only <- @only do + for only <- Pleroma.Constants.static_only_files() do at = Plug.Router.Utils.split("/") def call(%{request_path: "/" <> unquote(only) <> _} = conn, opts) do diff --git a/lib/pleroma/web/activity_pub/mrf/user_allow_list_policy.ex b/lib/pleroma/web/activity_pub/mrf/user_allow_list_policy.ex index a927a4ed8..651aed70f 100644 --- a/lib/pleroma/web/activity_pub/mrf/user_allow_list_policy.ex +++ b/lib/pleroma/web/activity_pub/mrf/user_allow_list_policy.ex @@ -24,7 +24,7 @@ def filter(%{"actor" => actor} = object) do allow_list = Config.get( - [:mrf_user_allowlist, String.to_atom(actor_info.host)], + [:mrf_user_allowlist, actor_info.host], [] ) diff --git a/lib/pleroma/web/endpoint.ex b/lib/pleroma/web/endpoint.ex index 72cb3ee27..226d42c2c 100644 --- a/lib/pleroma/web/endpoint.ex +++ b/lib/pleroma/web/endpoint.ex @@ -5,6 +5,8 @@ defmodule Pleroma.Web.Endpoint do use Phoenix.Endpoint, otp_app: :pleroma + require Pleroma.Constants + socket("/socket", Pleroma.Web.UserSocket) plug(Pleroma.Plugs.SetLocalePlug) @@ -34,8 +36,7 @@ defmodule Pleroma.Web.Endpoint do Plug.Static, at: "/", from: :pleroma, - only: - ~w(index.html robots.txt static finmoji emoji packs sounds images instance sw.js sw-pleroma.js favicon.png schemas doc), + only: Pleroma.Constants.static_only_files(), # credo:disable-for-previous-line Credo.Check.Readability.MaxLineLength gzip: true, cache_control_for_etags: @static_cache_control, diff --git a/lib/pleroma/web/mastodon_api/views/status_view.ex b/lib/pleroma/web/mastodon_api/views/status_view.ex index a042075f5..f0bdb49c3 100644 --- a/lib/pleroma/web/mastodon_api/views/status_view.ex +++ b/lib/pleroma/web/mastodon_api/views/status_view.ex @@ -307,8 +307,8 @@ def render("card.json", %{rich_media: rich_media, page_url: page_url}) do page_url_data = URI.parse(page_url) page_url_data = - if rich_media[:url] != nil do - URI.merge(page_url_data, URI.parse(rich_media[:url])) + if is_binary(rich_media["url"]) do + URI.merge(page_url_data, URI.parse(rich_media["url"])) else page_url_data end @@ -316,11 +316,9 @@ def render("card.json", %{rich_media: rich_media, page_url: page_url}) do page_url = page_url_data |> to_string image_url = - if rich_media[:image] != nil do - URI.merge(page_url_data, URI.parse(rich_media[:image])) + if is_binary(rich_media["image"]) do + URI.merge(page_url_data, URI.parse(rich_media["image"])) |> to_string - else - nil end %{ @@ -329,8 +327,8 @@ def render("card.json", %{rich_media: rich_media, page_url: page_url}) do provider_url: page_url_data.scheme <> "://" <> page_url_data.host, url: page_url, image: image_url |> MediaProxy.url(), - title: rich_media[:title] || "", - description: rich_media[:description] || "", + title: rich_media["title"] || "", + description: rich_media["description"] || "", pleroma: %{ opengraph: rich_media } diff --git a/lib/pleroma/web/rich_media/helpers.ex b/lib/pleroma/web/rich_media/helpers.ex index 9d3d7f978..1729141e9 100644 --- a/lib/pleroma/web/rich_media/helpers.ex +++ b/lib/pleroma/web/rich_media/helpers.ex @@ -9,7 +9,7 @@ defmodule Pleroma.Web.RichMedia.Helpers do alias Pleroma.Object alias Pleroma.Web.RichMedia.Parser - @spec validate_page_url(any()) :: :ok | :error + @spec validate_page_url(URI.t() | binary()) :: :ok | :error defp validate_page_url(page_url) when is_binary(page_url) do validate_tld = Application.get_env(:auto_linker, :opts)[:validate_tld] @@ -18,8 +18,8 @@ defp validate_page_url(page_url) when is_binary(page_url) do |> parse_uri(page_url) end - defp validate_page_url(%URI{host: host, scheme: scheme, authority: authority}) - when scheme == "https" and not is_nil(authority) do + defp validate_page_url(%URI{host: host, scheme: "https", authority: authority}) + when is_binary(authority) do cond do host in Config.get([:rich_media, :ignore_hosts], []) -> :error diff --git a/lib/pleroma/web/rich_media/parser.ex b/lib/pleroma/web/rich_media/parser.ex index 0779065ee..7b45ecb9c 100644 --- a/lib/pleroma/web/rich_media/parser.ex +++ b/lib/pleroma/web/rich_media/parser.ex @@ -83,7 +83,7 @@ defp parse_url(url) do html |> parse_html() |> maybe_parse() - |> Map.put(:url, url) + |> Map.put("url", url) |> clean_parsed_data() |> check_parsed_data() rescue @@ -103,8 +103,8 @@ defp maybe_parse(html) do end) end - defp check_parsed_data(%{title: title} = data) - when is_binary(title) and byte_size(title) > 0 do + defp check_parsed_data(%{"title" => title} = data) + when is_binary(title) and title != "" do {:ok, data} end @@ -115,11 +115,7 @@ defp check_parsed_data(data) do defp clean_parsed_data(data) do data |> Enum.reject(fn {key, val} -> - with {:ok, _} <- Jason.encode(%{key => val}) do - false - else - _ -> true - end + not match?({:ok, _}, Jason.encode(%{key => val})) end) |> Map.new() end diff --git a/lib/pleroma/web/rich_media/parsers/meta_tags_parser.ex b/lib/pleroma/web/rich_media/parsers/meta_tags_parser.ex index ae0f36702..2762b5902 100644 --- a/lib/pleroma/web/rich_media/parsers/meta_tags_parser.ex +++ b/lib/pleroma/web/rich_media/parsers/meta_tags_parser.ex @@ -29,19 +29,19 @@ defp normalize_attributes(html_node, prefix, key_name, value_name) do {_tag, attributes, _children} = html_node data = - Enum.into(attributes, %{}, fn {name, value} -> + Map.new(attributes, fn {name, value} -> {name, String.trim_leading(value, "#{prefix}:")} end) - %{String.to_atom(data[key_name]) => data[value_name]} + %{data[key_name] => data[value_name]} end - defp maybe_put_title(%{title: _} = meta, _), do: meta + defp maybe_put_title(%{"title" => _} = meta, _), do: meta defp maybe_put_title(meta, html) when meta != %{} do case get_page_title(html) do "" -> meta - title -> Map.put_new(meta, :title, title) + title -> Map.put_new(meta, "title", title) end end diff --git a/lib/pleroma/web/rich_media/parsers/oembed_parser.ex b/lib/pleroma/web/rich_media/parsers/oembed_parser.ex index 8f32bf91b..db8ccf15d 100644 --- a/lib/pleroma/web/rich_media/parsers/oembed_parser.ex +++ b/lib/pleroma/web/rich_media/parsers/oembed_parser.ex @@ -5,7 +5,7 @@ defmodule Pleroma.Web.RichMedia.Parsers.OEmbed do def parse(html, _data) do with elements = [_ | _] <- get_discovery_data(html), - {:ok, oembed_url} <- get_oembed_url(elements), + oembed_url when is_binary(oembed_url) <- get_oembed_url(elements), {:ok, oembed_data} <- get_oembed_data(oembed_url) do {:ok, oembed_data} else @@ -17,19 +17,13 @@ defp get_discovery_data(html) do html |> Floki.find("link[type='application/json+oembed']") end - defp get_oembed_url(nodes) do - {"link", attributes, _children} = nodes |> hd() - - {:ok, Enum.into(attributes, %{})["href"]} + defp get_oembed_url([{"link", attributes, _children} | _]) do + Enum.find_value(attributes, fn {k, v} -> if k == "href", do: v end) end defp get_oembed_data(url) do - {:ok, %Tesla.Env{body: json}} = Pleroma.HTTP.get(url, [], adapter: [pool: :media]) - - {:ok, data} = Jason.decode(json) - - data = data |> Map.new(fn {k, v} -> {String.to_atom(k), v} end) - - {:ok, data} + with {:ok, %Tesla.Env{body: json}} <- Pleroma.HTTP.get(url, [], adapter: [pool: :media]) do + Jason.decode(json) + end end end diff --git a/lib/pleroma/web/templates/layout/static_fe.html.eex b/lib/pleroma/web/templates/layout/static_fe.html.eex index 819632cec..dc0ee2a5c 100644 --- a/lib/pleroma/web/templates/layout/static_fe.html.eex +++ b/lib/pleroma/web/templates/layout/static_fe.html.eex @@ -5,7 +5,7 @@