mirror of
https://akkoma.dev/AkkomaGang/akkoma.git
synced 2024-11-29 08:47:09 +00:00
bed7ff8e89
Logger output being visible depends on user configuration, but most of the prints in mix tasks should always be shown. When running inside a mix shell, it’s probably preferable to send output directly to it rather than using raw IO.puts and we already have shell_* functions for this, let’s use them everywhere.
331 lines
10 KiB
Elixir
331 lines
10 KiB
Elixir
# Akkoma: Magically expressive social media
|
|
# Copyright © 2024 Akkoma Authors <https://akkoma.dev/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Mix.Tasks.Pleroma.Security do
|
|
use Mix.Task
|
|
import Ecto.Query
|
|
import Mix.Pleroma
|
|
|
|
alias Pleroma.Config
|
|
|
|
require Logger
|
|
|
|
@shortdoc """
|
|
Security-related tasks, like e.g. checking for signs past exploits were abused.
|
|
"""
|
|
|
|
# Constants etc
|
|
defp local_id_prefix(), do: Pleroma.Web.Endpoint.url() <> "/"
|
|
|
|
defp local_id_pattern(), do: local_id_prefix() <> "%"
|
|
|
|
@activity_exts ["activity+json", "activity%2Bjson"]
|
|
|
|
defp activity_ext_url_patterns() do
|
|
for e <- @activity_exts do
|
|
for suf <- ["", "?%"] do
|
|
# Escape literal % for use in SQL patterns
|
|
ee = String.replace(e, "%", "\\%")
|
|
"%.#{ee}#{suf}"
|
|
end
|
|
end
|
|
|> List.flatten()
|
|
end
|
|
|
|
# Search for malicious uploads exploiting the lack of Content-Type sanitisation from before 2024-03
|
|
def run(["spoof-uploaded"]) do
|
|
Logger.put_process_level(self(), :notice)
|
|
start_pleroma()
|
|
|
|
shell_info("""
|
|
+------------------------+
|
|
| SPOOF SEARCH UPLOADS |
|
|
+------------------------+
|
|
Checking if any uploads are using privileged types.
|
|
NOTE if attachment deletion is enabled, payloads used
|
|
in the past may no longer exist.
|
|
""")
|
|
|
|
do_spoof_uploaded()
|
|
end
|
|
|
|
# Fuzzy search for potentially counterfeit activities in the database resulting from the same exploit
|
|
def run(["spoof-inserted"]) do
|
|
Logger.put_process_level(self(), :notice)
|
|
start_pleroma()
|
|
|
|
shell_info("""
|
|
+----------------------+
|
|
| SPOOF SEARCH NOTES |
|
|
+----------------------+
|
|
Starting fuzzy search for counterfeit activities.
|
|
NOTE this can not guarantee detecting all counterfeits
|
|
and may yield a small percentage of false positives.
|
|
""")
|
|
|
|
do_spoof_inserted()
|
|
end
|
|
|
|
# +-----------------------------+
|
|
# | S P O O F - U P L O A D E D |
|
|
# +-----------------------------+
|
|
defp do_spoof_uploaded() do
|
|
files =
|
|
case Config.get!([Pleroma.Upload, :uploader]) do
|
|
Pleroma.Uploaders.Local ->
|
|
uploads_search_spoofs_local_dir(Config.get!([Pleroma.Uploaders.Local, :uploads]))
|
|
|
|
_ ->
|
|
shell_info("""
|
|
NOTE:
|
|
Not using local uploader; thus not affected by this exploit.
|
|
It's impossible to check for files, but in case local uploader was used before
|
|
or to check if anyone futilely attempted a spoof, notes will still be scanned.
|
|
""")
|
|
|
|
[]
|
|
end
|
|
|
|
emoji = uploads_search_spoofs_local_dir(Config.get!([:instance, :static_dir]))
|
|
|
|
post_attachs = uploads_search_spoofs_notes()
|
|
|
|
not_orphaned_urls =
|
|
post_attachs
|
|
|> Enum.map(fn {_u, _a, url} -> url end)
|
|
|> MapSet.new()
|
|
|
|
orphaned_attachs = upload_search_orphaned_attachments(not_orphaned_urls)
|
|
|
|
shell_info("\nSearch concluded; here are the results:")
|
|
pretty_print_list_with_title(emoji, "Emoji")
|
|
pretty_print_list_with_title(files, "Uploaded Files")
|
|
pretty_print_list_with_title(post_attachs, "(Not Deleted) Post Attachments")
|
|
pretty_print_list_with_title(orphaned_attachs, "Orphaned Uploads")
|
|
|
|
shell_info("""
|
|
In total found
|
|
#{length(emoji)} emoji
|
|
#{length(files)} uploads
|
|
#{length(post_attachs)} not deleted posts
|
|
#{length(orphaned_attachs)} orphaned attachments
|
|
""")
|
|
end
|
|
|
|
defp uploads_search_spoofs_local_dir(dir) do
|
|
local_dir = String.replace_suffix(dir, "/", "")
|
|
|
|
shell_info("Searching for suspicious files in #{local_dir}...")
|
|
|
|
glob_ext = "{" <> Enum.join(@activity_exts, ",") <> "}"
|
|
|
|
Path.wildcard(local_dir <> "/**/*." <> glob_ext, match_dot: true)
|
|
|> Enum.map(fn path ->
|
|
String.replace_prefix(path, local_dir <> "/", "")
|
|
end)
|
|
|> Enum.sort()
|
|
end
|
|
|
|
defp uploads_search_spoofs_notes() do
|
|
shell_info("Now querying DB for posts with spoofing attachments. This might take a while...")
|
|
|
|
patterns = [local_id_pattern() | activity_ext_url_patterns()]
|
|
|
|
# if jsonb_array_elemsts in FROM can be used with normal Ecto functions, idk how
|
|
"""
|
|
SELECT DISTINCT a.data->>'actor', a.id, url->>'href'
|
|
FROM public.objects AS o JOIN public.activities AS a
|
|
ON o.data->>'id' = a.data->>'object',
|
|
jsonb_array_elements(o.data->'attachment') AS attachs,
|
|
jsonb_array_elements(attachs->'url') AS url
|
|
WHERE o.data->>'type' = 'Note' AND
|
|
o.data->>'id' LIKE $1::text AND (
|
|
url->>'href' LIKE $2::text OR
|
|
url->>'href' LIKE $3::text OR
|
|
url->>'href' LIKE $4::text OR
|
|
url->>'href' LIKE $5::text
|
|
)
|
|
ORDER BY a.data->>'actor', a.id, url->>'href';
|
|
"""
|
|
|> Pleroma.Repo.query!(patterns, timeout: :infinity)
|
|
|> map_raw_id_apid_tuple()
|
|
end
|
|
|
|
defp upload_search_orphaned_attachments(not_orphaned_urls) do
|
|
shell_info("""
|
|
Now querying DB for orphaned spoofing attachment (i.e. their post was deleted,
|
|
but if :cleanup_attachments was not enabled traces remain in the database)
|
|
This might take a bit...
|
|
""")
|
|
|
|
patterns = activity_ext_url_patterns()
|
|
|
|
"""
|
|
SELECT DISTINCT attach.id, url->>'href'
|
|
FROM public.objects AS attach,
|
|
jsonb_array_elements(attach.data->'url') AS url
|
|
WHERE (attach.data->>'type' = 'Image' OR
|
|
attach.data->>'type' = 'Document')
|
|
AND (
|
|
url->>'href' LIKE $1::text OR
|
|
url->>'href' LIKE $2::text OR
|
|
url->>'href' LIKE $3::text OR
|
|
url->>'href' LIKE $4::text
|
|
)
|
|
ORDER BY attach.id, url->>'href';
|
|
"""
|
|
|> Pleroma.Repo.query!(patterns, timeout: :infinity)
|
|
|> then(fn res -> Enum.map(res.rows, fn [id, url] -> {id, url} end) end)
|
|
|> Enum.filter(fn {_, url} -> !(url in not_orphaned_urls) end)
|
|
end
|
|
|
|
# +-----------------------------+
|
|
# | S P O O F - I N S E R T E D |
|
|
# +-----------------------------+
|
|
defp do_spoof_inserted() do
|
|
shell_info("""
|
|
Searching for local posts whose Create activity has no ActivityPub id...
|
|
This is a pretty good indicator, but only for spoofs of local actors
|
|
and only if the spoofing happened after around late 2021.
|
|
""")
|
|
|
|
idless_create =
|
|
search_local_notes_without_create_id()
|
|
|> Enum.sort()
|
|
|
|
shell_info("Done.\n")
|
|
|
|
shell_info("""
|
|
Now trying to weed out other poorly hidden spoofs.
|
|
This can't detect all and may have some false positives.
|
|
""")
|
|
|
|
likely_spoofed_posts_set = MapSet.new(idless_create)
|
|
|
|
sus_pattern_posts =
|
|
search_sus_notes_by_id_patterns()
|
|
|> Enum.filter(fn r -> !(r in likely_spoofed_posts_set) end)
|
|
|
|
shell_info("Done.\n")
|
|
|
|
shell_info("""
|
|
Finally, searching for spoofed, local user accounts.
|
|
(It's impossible to detect spoofed remote users)
|
|
""")
|
|
|
|
spoofed_users = search_bogus_local_users()
|
|
|
|
pretty_print_list_with_title(sus_pattern_posts, "Maybe Spoofed Posts")
|
|
pretty_print_list_with_title(idless_create, "Likely Spoofed Posts")
|
|
pretty_print_list_with_title(spoofed_users, "Spoofed local user accounts")
|
|
|
|
shell_info("""
|
|
In total found:
|
|
#{length(spoofed_users)} bogus users
|
|
#{length(idless_create)} likely spoofed posts
|
|
#{length(sus_pattern_posts)} maybe spoofed posts
|
|
""")
|
|
end
|
|
|
|
defp search_local_notes_without_create_id() do
|
|
Pleroma.Object
|
|
|> where([o], fragment("?->>'id' LIKE ?", o.data, ^local_id_pattern()))
|
|
|> join(:inner, [o], a in Pleroma.Activity,
|
|
on: fragment("?->>'object' = ?->>'id'", a.data, o.data)
|
|
)
|
|
|> where([o, a], fragment("NOT (? \\? 'id') OR ?->>'id' IS NULL", a.data, a.data))
|
|
|> select([o, a], {a.id, fragment("?->>'id'", o.data)})
|
|
|> order_by([o, a], a.id)
|
|
|> Pleroma.Repo.all(timeout: :infinity)
|
|
end
|
|
|
|
defp search_sus_notes_by_id_patterns() do
|
|
[ep1, ep2, ep3, ep4] = activity_ext_url_patterns()
|
|
|
|
Pleroma.Object
|
|
|> where(
|
|
[o],
|
|
# for local objects we know exactly how a genuine id looks like
|
|
# (though a thorough attacker can emulate this)
|
|
# for remote posts, use some best-effort patterns
|
|
fragment(
|
|
"""
|
|
(?->>'id' LIKE ? AND ?->>'id' NOT SIMILAR TO
|
|
? || 'objects/[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}')
|
|
""",
|
|
o.data,
|
|
^local_id_pattern(),
|
|
o.data,
|
|
^local_id_prefix()
|
|
) or
|
|
fragment("?->>'id' LIKE ?", o.data, "%/emoji/%") or
|
|
fragment("?->>'id' LIKE ?", o.data, "%/media/%") or
|
|
fragment("?->>'id' LIKE ?", o.data, "%/proxy/%") or
|
|
fragment("?->>'id' LIKE ?", o.data, ^ep1) or
|
|
fragment("?->>'id' LIKE ?", o.data, ^ep2) or
|
|
fragment("?->>'id' LIKE ?", o.data, ^ep3) or
|
|
fragment("?->>'id' LIKE ?", o.data, ^ep4)
|
|
)
|
|
|> join(:inner, [o], a in Pleroma.Activity,
|
|
on: fragment("?->>'object' = ?->>'id'", a.data, o.data)
|
|
)
|
|
|> select([o, a], {a.id, fragment("?->>'id'", o.data)})
|
|
|> order_by([o, a], a.id)
|
|
|> Pleroma.Repo.all(timeout: :infinity)
|
|
end
|
|
|
|
defp search_bogus_local_users() do
|
|
Pleroma.User.Query.build(%{})
|
|
|> where([u], u.local == false and like(u.ap_id, ^local_id_pattern()))
|
|
|> order_by([u], u.ap_id)
|
|
|> select([u], u.ap_id)
|
|
|> Pleroma.Repo.all(timeout: :infinity)
|
|
end
|
|
|
|
# +-----------------------------------+
|
|
# | module-specific utility functions |
|
|
# +-----------------------------------+
|
|
defp pretty_print_list_with_title(list, title) do
|
|
title_len = String.length(title)
|
|
title_underline = String.duplicate("=", title_len)
|
|
shell_info(title)
|
|
shell_info(title_underline)
|
|
pretty_print_list(list)
|
|
end
|
|
|
|
defp pretty_print_list([]), do: shell_info("")
|
|
|
|
defp pretty_print_list([{a, o} | rest])
|
|
when (is_binary(a) or is_number(a)) and is_binary(o) do
|
|
shell_info(" {#{a}, #{o}}")
|
|
pretty_print_list(rest)
|
|
end
|
|
|
|
defp pretty_print_list([{u, a, o} | rest])
|
|
when is_binary(a) and is_binary(u) and is_binary(o) do
|
|
shell_info(" {#{u}, #{a}, #{o}}")
|
|
pretty_print_list(rest)
|
|
end
|
|
|
|
defp pretty_print_list([e | rest]) when is_binary(e) do
|
|
shell_info(" #{e}")
|
|
pretty_print_list(rest)
|
|
end
|
|
|
|
defp pretty_print_list([e | rest]), do: pretty_print_list([inspect(e) | rest])
|
|
|
|
defp map_raw_id_apid_tuple(res) do
|
|
user_prefix = local_id_prefix() <> "users/"
|
|
|
|
Enum.map(res.rows, fn
|
|
[uid, aid, oid] ->
|
|
{
|
|
String.replace_prefix(uid, user_prefix, ""),
|
|
FlakeId.to_string(aid),
|
|
oid
|
|
}
|
|
end)
|
|
end
|
|
end
|