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-rw-r--r--CHANGELOG.md3
-rw-r--r--lib/pleroma/web/ostatus/handlers/follow_handler.ex2
-rw-r--r--lib/pleroma/web/ostatus/handlers/note_handler.ex2
-rw-r--r--lib/pleroma/web/ostatus/handlers/unfollow_handler.ex2
-rw-r--r--lib/pleroma/web/ostatus/ostatus.ex17
-rw-r--r--test/web/ostatus/ostatus_test.exs48
6 files changed, 63 insertions, 11 deletions
diff --git a/CHANGELOG.md b/CHANGELOG.md
index acd55362d..b02ed243b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ 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/).
## [Unreleased]
+### Security
+- OStatus: eliminate the possibility of a protocol downgrade attack.
+
### Changed
- **Breaking:** Configuration: A setting to explicitly disable the mailer was added, defaulting to true, if you are using a mailer add `config :pleroma, Pleroma.Emails.Mailer, enabled: true` to your config
- **Breaking:** Configuration: `/media/` is now removed when `base_url` is configured, append `/media/` to your `base_url` config to keep the old behaviour if desired
diff --git a/lib/pleroma/web/ostatus/handlers/follow_handler.ex b/lib/pleroma/web/ostatus/handlers/follow_handler.ex
index 263d3b2dc..03e4cbbb0 100644
--- a/lib/pleroma/web/ostatus/handlers/follow_handler.ex
+++ b/lib/pleroma/web/ostatus/handlers/follow_handler.ex
@@ -9,7 +9,7 @@ defmodule Pleroma.Web.OStatus.FollowHandler do
alias Pleroma.Web.XML
def handle(entry, doc) do
- with {:ok, actor} <- OStatus.find_make_or_update_user(doc),
+ with {:ok, actor} <- OStatus.find_make_or_update_actor(doc),
id when not is_nil(id) <- XML.string_from_xpath("/entry/id", entry),
followed_uri when not is_nil(followed_uri) <-
XML.string_from_xpath("/entry/activity:object/id", entry),
diff --git a/lib/pleroma/web/ostatus/handlers/note_handler.ex b/lib/pleroma/web/ostatus/handlers/note_handler.ex
index 3005e8f57..7fae14f7b 100644
--- a/lib/pleroma/web/ostatus/handlers/note_handler.ex
+++ b/lib/pleroma/web/ostatus/handlers/note_handler.ex
@@ -111,7 +111,7 @@ defmodule Pleroma.Web.OStatus.NoteHandler do
with id <- XML.string_from_xpath("//id", entry),
activity when is_nil(activity) <- Activity.get_create_by_object_ap_id_with_object(id),
[author] <- :xmerl_xpath.string('//author[1]', doc),
- {:ok, actor} <- OStatus.find_make_or_update_user(author),
+ {:ok, actor} <- OStatus.find_make_or_update_actor(author),
content_html <- OStatus.get_content(entry),
cw <- OStatus.get_cw(entry),
in_reply_to <- XML.string_from_xpath("//thr:in-reply-to[1]/@ref", entry),
diff --git a/lib/pleroma/web/ostatus/handlers/unfollow_handler.ex b/lib/pleroma/web/ostatus/handlers/unfollow_handler.ex
index 6596ada3b..2062432e3 100644
--- a/lib/pleroma/web/ostatus/handlers/unfollow_handler.ex
+++ b/lib/pleroma/web/ostatus/handlers/unfollow_handler.ex
@@ -9,7 +9,7 @@ defmodule Pleroma.Web.OStatus.UnfollowHandler do
alias Pleroma.Web.XML
def handle(entry, doc) do
- with {:ok, actor} <- OStatus.find_make_or_update_user(doc),
+ with {:ok, actor} <- OStatus.find_make_or_update_actor(doc),
id when not is_nil(id) <- XML.string_from_xpath("/entry/id", entry),
followed_uri when not is_nil(followed_uri) <-
XML.string_from_xpath("/entry/activity:object/id", entry),
diff --git a/lib/pleroma/web/ostatus/ostatus.ex b/lib/pleroma/web/ostatus/ostatus.ex
index 502410c83..331cbc0b7 100644
--- a/lib/pleroma/web/ostatus/ostatus.ex
+++ b/lib/pleroma/web/ostatus/ostatus.ex
@@ -56,7 +56,7 @@ defmodule Pleroma.Web.OStatus do
def handle_incoming(xml_string, options \\ []) do
with doc when doc != :error <- parse_document(xml_string) do
- with {:ok, actor_user} <- find_make_or_update_user(doc),
+ with {:ok, actor_user} <- find_make_or_update_actor(doc),
do: Pleroma.Instances.set_reachable(actor_user.ap_id)
entries = :xmerl_xpath.string('//entry', doc)
@@ -120,7 +120,7 @@ defmodule Pleroma.Web.OStatus do
end
def make_share(entry, doc, retweeted_activity) do
- with {:ok, actor} <- find_make_or_update_user(doc),
+ with {:ok, actor} <- find_make_or_update_actor(doc),
%Object{} = object <- Object.normalize(retweeted_activity),
id when not is_nil(id) <- string_from_xpath("/entry/id", entry),
{:ok, activity, _object} = ActivityPub.announce(actor, object, id, false) do
@@ -138,7 +138,7 @@ defmodule Pleroma.Web.OStatus do
end
def make_favorite(entry, doc, favorited_activity) do
- with {:ok, actor} <- find_make_or_update_user(doc),
+ with {:ok, actor} <- find_make_or_update_actor(doc),
%Object{} = object <- Object.normalize(favorited_activity),
id when not is_nil(id) <- string_from_xpath("/entry/id", entry),
{:ok, activity, _object} = ActivityPub.like(actor, object, id, false) do
@@ -264,11 +264,18 @@ defmodule Pleroma.Web.OStatus do
end
end
- def find_make_or_update_user(doc) do
+ def find_make_or_update_actor(doc) do
uri = string_from_xpath("//author/uri[1]", doc)
- with {:ok, user} <- find_or_make_user(uri) do
+ with {:ok, %User{} = user} <- find_or_make_user(uri),
+ {:ap_enabled, false} <- {:ap_enabled, User.ap_enabled?(user)} do
maybe_update(doc, user)
+ else
+ {:ap_enabled, true} ->
+ {:error, :invalid_protocol}
+
+ _ ->
+ {:error, :unknown_user}
end
end
diff --git a/test/web/ostatus/ostatus_test.exs b/test/web/ostatus/ostatus_test.exs
index 4e8f3a0fc..d244dbcf7 100644
--- a/test/web/ostatus/ostatus_test.exs
+++ b/test/web/ostatus/ostatus_test.exs
@@ -426,7 +426,7 @@ defmodule Pleroma.Web.OStatusTest do
}
end
- test "find_make_or_update_user takes an author element and returns an updated user" do
+ test "find_make_or_update_actor takes an author element and returns an updated user" do
uri = "https://social.heldscal.la/user/23211"
{:ok, user} = OStatus.find_or_make_user(uri)
@@ -439,14 +439,56 @@ defmodule Pleroma.Web.OStatusTest do
doc = XML.parse_document(File.read!("test/fixtures/23211.atom"))
[author] = :xmerl_xpath.string('//author[1]', doc)
- {:ok, user} = OStatus.find_make_or_update_user(author)
+ {:ok, user} = OStatus.find_make_or_update_actor(author)
assert user.avatar["type"] == "Image"
assert user.name == old_name
assert user.bio == old_bio
- {:ok, user_again} = OStatus.find_make_or_update_user(author)
+ {:ok, user_again} = OStatus.find_make_or_update_actor(author)
assert user_again == user
end
+
+ test "find_or_make_user disallows protocol downgrade" do
+ user = insert(:user, %{local: true})
+ {:ok, user} = OStatus.find_or_make_user(user.ap_id)
+
+ assert User.ap_enabled?(user)
+
+ user =
+ insert(:user, %{
+ ap_id: "https://social.heldscal.la/user/23211",
+ info: %{ap_enabled: true},
+ local: false
+ })
+
+ assert User.ap_enabled?(user)
+
+ {:ok, user} = OStatus.find_or_make_user(user.ap_id)
+ assert User.ap_enabled?(user)
+ end
+
+ test "find_make_or_update_actor disallows protocol downgrade" do
+ user = insert(:user, %{local: true})
+ {:ok, user} = OStatus.find_or_make_user(user.ap_id)
+
+ assert User.ap_enabled?(user)
+
+ user =
+ insert(:user, %{
+ ap_id: "https://social.heldscal.la/user/23211",
+ info: %{ap_enabled: true},
+ local: false
+ })
+
+ assert User.ap_enabled?(user)
+
+ {:ok, user} = OStatus.find_or_make_user(user.ap_id)
+ assert User.ap_enabled?(user)
+
+ doc = XML.parse_document(File.read!("test/fixtures/23211.atom"))
+ [author] = :xmerl_xpath.string('//author[1]', doc)
+ {:error, :invalid_protocol} = OStatus.find_make_or_update_actor(author)
+ end
end
describe "gathering user info from a user id" do
generated by cgit v1.2.3 (git 2.26.2) at 2025-04-24 12:14:48 +0000