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8884 commits

Author SHA1 Message Date
9a91299f96 Don't try to handle non-media objects as media
Trying to display non-media as media crashed the renderer,
but when posting a status with a valid, non-media object id
the post was still created, but then crashed e.g. timeline rendering.
It also crashed C2S inbox reads, so this could not be used to leak
private posts.
2024-05-22 20:30:23 +02:00
fbd961c747 Drop activity_type override for uploads
Afaict this was never used, but keeping this (in theory) possible
hinders detecting which objects are actually media uploads and
which proper ActivityPub objects.

It was originally added as part of upload support itself in
02d3dc6869 without being used
and `git log -S:activity_type` and `git log -Sactivity_type:`
don't find any other commits using this.
2024-05-22 20:30:23 +02:00
0c2b33458d Restrict media usage to owners
In Mastodon media can only be used by owners and only be associated with
a single post. We currently allow media to be associated with several
posts and until now did not limit their usage in posts to media owners.
However, media update and GET lookup was already limited to owners.
(In accordance with allowing media reuse, we also still allow GET
lookups of media already used in a post unlike Mastodon)

Allowing reuse isn’t problematic per se, but allowing use by non-owners
can be problematic if media ids of private-scoped posts can be guessed
since creating a new post with this media id will reveal the uploaded
file content and alt text.
Given media ids are currently just part of a sequentieal series shared
with some other objects, guessing media ids is with some persistence
indeed feasible.

E.g. sampline some public media ids from a real-world
instance with 112 total and 61 monthly-active users:

  17.465.096  at  t0
  17.472.673  at  t1 = t0 + 4h
  17.473.248  at  t2 = t1 + 20min

This gives about 30 new ids per minute of which most won't be
local media but remote and local posts, poll answers etc.
Assuming the default ratelimit of 15 post actions per 10s, scraping all
media for the 4h interval takes about 84 minutes and scraping the 20min
range mere 6.3 minutes. (Until the preceding commit, post updates were
not rate limited at all, allowing even faster scraping.)
If an attacker can infer (e.g. via reply to a follower-only post not
accessbile to the attacker) some sensitive information was uploaded
during a specific time interval and has some pointers regarding the
nature of the information, identifying the specific upload out of all
scraped media for this timerange is not impossible.

Thus restrict media usage to owners.

Checking ownership just in ActivitDraft would already be sufficient,
since when a scheduled status actually gets posted it goes through
ActivityDraft again, but would erroneously return a success status
when scheduling an illegal post.

Independently discovered and fixed by mint in Pleroma
1afde067b1
2024-05-22 20:30:18 +02:00
6ef6b2a289 Apply rate limits to status updates 2024-05-22 20:18:08 +02:00
94e9c8f48a Purge unused media description update on post
In MastoAPI media descriptions are updated via the
media update API not upon post creation or post update.

This functionality was originally added about 6 years ago in
ba93396649 which was part of
https://git.pleroma.social/pleroma/pleroma/-/merge_requests/626 and
https://git.pleroma.social/pleroma/pleroma-fe/-/merge_requests/450.
They introduced image descriptions to the front- and backend,
but predate adoption of Mastodon API.

For a while adding an `descriptions` array on post creation might have
continued to work as an undocumented Pleroma extension to Masto API, but
at latest when OpenAPI specs were added for those endpoints four years
ago in 7803a85d2c, these codepaths ceased
to be used. The API specs don’t list a `descriptions` parameter and
any unknown parameters are stripped out.

The attachments_from_ids function is only called from
ScheduledActivity and ActivityDraft.create with the latter
only being called by CommonAPI.{post,update} whihc in turn
are only called from ScheduledActivity again, MastoAPI controller
and without any attachment or description parameter WelcomeMessage.
Therefore no codepath can contain a descriptions parameter.
2024-05-22 20:18:08 +02:00
873aa9da1c activity_draft: mark new/2 as private 2024-05-22 20:18:08 +02:00
34a48cb87f scheduled_activity: mark private functions as private
And remove unused due_activities/1
2024-05-22 20:18:08 +02:00
76ded10a70 Merge pull request 'Backoff on HTTP requests when 429 is recieved' (#762) from backoff-http into develop
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Reviewed-on: #762
2024-05-11 04:38:47 +00:00
4457928e32 duct-tape fix for #438
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we really need to make this less manual
2024-05-11 05:30:18 +01:00
bd74693db6 additionally support retry-after values
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2024-05-06 23:34:48 +01:00
010e8c7bb2 where were you when lint fail
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2024-04-26 19:28:01 +01:00
f531484063 Merge branch 'develop' into backoff-http
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2024-04-26 19:06:18 +01:00
ec7e9da734 Correct ttl syntax for new cachex 2024-04-26 19:05:12 +01:00
3c384c1b76 Add ratelimit backoff to HTTP get 2024-04-26 19:01:12 +01:00
2437a3e9ba add test for backoff 2024-04-26 19:01:01 +01:00
ad7dcf38a8 Add HTTP backoff cache to respect 429s 2024-04-26 19:00:35 +01:00
828158ef49 Merge remote-tracking branch 'oneric/fedfix-public-ld' into develop
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2024-04-26 18:49:31 +01:00
5ee0fb18cb exiftool: make stripped tags configurable 2024-04-26 18:57:24 +02:00
a95af3ee4c exiftool: strip all non-essential tags
Documentation was already clear on this only stripping GPS tags.
But there are more potentially sensitive metadata tags (e.g. author
and possibly description) and the name alone suggests a broader effect.

Thus change the filter to strip all metadata except for colourspace info
and orientation (technically it strips everything and then readds
selected tags).

Explicitly stripping CommonIFD0 is needed since -all does not modify
IFD0 due to TIFF storing some actual image data there. CommonIFD0 then
strips a bunch of commonly used actual metadata tags from IFD0, to my
understanding leaving TIFF image data and custom metadata tags intact.
2024-04-25 23:00:42 +02:00
163cb1d5e0 exiftool: strip JXL and HEIC
As of exiftool 12.57 both formats are supported, but EXIF data is
optional for JXL and if exiftool doesn’t find a preexisting metadata
chunk it will create one and treat it as a minor error resulting in
a non-zero exit code.
Setting -ignoreMinorErrors avoids failing on such uploads.
2024-04-25 23:00:42 +02:00
b0a46c1e2e Normalise public adressing to fix federation
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Due to JSON-LD compaction the full address of public scope
may also occur in shorter forms and the spec requires us to treat them
all equivalently. To save us the pain of repeatedly checking for all
variants internally, normalise inbound data to just one form.
See note at: https://www.w3.org/TR/activitypub/#public-addressing

This needs to happen very early, even before the other addressing fixes
else an earlier validator will reject the object. This in turn required
to move the list-tpye normalisation earlier as well, but since I was
unsure about putting empty lists into the data when no such field
existed before, I excluded this case and thus the later fixing had to be
kept as well.

Fixes: #670
2024-04-25 18:45:16 +02:00
b1c6621e66 Merge pull request 'Read image description from EXIF data' (#744) from timorl/akkoma:elseinspe into develop
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Reviewed-on: #744
2024-04-25 12:52:31 +00:00
764dbeded4 Merge pull request 'Accept all standard actor types' (#751) from Oneric/akkoma:all-actor-types into develop
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Reviewed-on: #751
2024-04-24 17:09:02 +00:00
80e1c094c7 Merge pull request 'Don't strip newlines in pre' (#709) from snan/akkoma:pre into develop
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Reviewed-on: #709
2024-04-24 17:00:34 +00:00
4a0e90e8a8 Merge pull request 'ReceiverWorker: Make sure non-{:ok, _} is returned as {:error, …}' (#753) from Oneric/akkoma:receive-worker-return into develop
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Reviewed-on: #753
2024-04-24 17:00:18 +00:00
83f75c3e93 Accept all standard actor types
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2024-04-23 18:14:34 +02:00
92168fa5a1 Merge remote-tracking branch 'origin/develop' into who-wants-to-yeet-c2s-i-want-to-yeet-c2s
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2024-04-23 14:37:05 +01:00
3e199242b0 remove upload_media from AP representation
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2024-04-23 14:35:52 +01:00
Haelwenn (lanodan) Monnier
0c2f200b4d ReceiverWorker: Make sure non-{:ok, _} is returned as {:error, …}
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Otherwise an error like `{:signature, {:error, {:error, :not_found}}}`
ends up considered a success.

Cherry-picked-from: a299ddb10e
2024-04-21 20:58:06 +02:00
timorl
9da0fe930e
Format, but this time with a non-ancient version of elixir 2024-04-19 18:07:50 +02:00
timorl
2a9db73b4c
Merge branch 'develop' into elseinspe 2024-04-19 17:11:55 +02:00
370576474c only consider :op and :id args in duplicate checks
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2024-04-19 11:39:27 +01:00
1ed975636b Keep READ endpoints, purge WRITE
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2024-04-19 11:06:01 +01:00
timorl
cd7af81896
Rename StripLocation to StripMetadata for temporal-proofing reasons
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2024-04-16 20:37:00 +02:00
ddb8a5ef73 yeet AP C2S support
literally nothing uses C2S AP, and it's another route into core
systems which requires analysis and maintenance. A second API
is just extra surface for potentially bad things so let's take
it out back and obliterate it
2024-04-16 13:55:03 +01:00
123db1abc4 Merge branch 'develop' into failed-fetch-processing
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2024-04-16 12:35:54 +01:00
b2c29527fb make xmerl shut up about markup
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2024-04-16 10:19:30 +01:00
timorl
59d32c10d9
Formatting 2024-04-16 08:02:13 +02:00
d2cee15c15 mix format says no
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2024-04-16 03:07:28 +01:00
d70fa16383 oban options should be a keyword list
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2024-04-16 02:58:50 +01:00
5043571084 Enable oban job uniqueness
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by default just prevent job floods with a 1-seconds
uniqueness check, but override in RemoteFetcherWorker
for 5 minute uniqueness check over all states

:infinity is an option we can go for maybe at some point,
but that would prevent any refetches so maybe not idk.
2024-04-16 02:53:24 +01:00
b7dd739de1 Make sure we return the right format for oban 2024-04-16 02:35:21 +01:00
timorl
b144218dce
Merge branch 'develop' into elseinspe
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2024-04-14 20:31:33 +02:00
2fc25980d1 fix pattern matching in fetch errors
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2024-04-13 23:55:26 +01:00
c1f0b6b875 Merge pull request 'Accept body parameters for /api/pleroma/notification_settings' (#738) from Oneric/akkoma:notif-setting-parameters into develop
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Reviewed-on: #738
2024-04-13 22:55:02 +00:00
33fb74043d Bring our adjustments into line with atom-failure 2024-04-13 22:56:04 +01:00
49ed27cd96 require logger 2024-04-13 22:25:31 +01:00
2e369aef71 Allow the Remote Fetcher to attempt fetching an unreachable instance 2024-04-12 20:33:21 +01:00
fed7a78c77 Oban jobs should be discarded on permanent errors 2024-04-12 20:33:17 +01:00
c0532bcae0 Handle 401s as I have observed it in the wild 2024-04-12 20:33:11 +01:00