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[ActivityPub][NOTE] Do not extract actor from attributedTo

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There was no checking of attributedTo, actors and referent object IDs to make
sure they exist in the same domain. Therefore, one could spoof messages from
people by doing attributedTo: whoever-i-want-to-spoof
This commit is contained in:
Diogo Cordeiro 2020-07-05 01:58:22 +01:00
parent fe4a9a6189
commit 4d171b27a4
1 changed files with 1 additions and 12 deletions
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13
plugins/ActivityPub/lib/models/Activitypub_notice.php
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@ -123,7 +123,7 @@ class Activitypub_notice
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function create_notice(array $object, Profile $actor_profile = null, bool $directMessage = false): Notice
public static function create_notice(array $object, Profile $actor_profile, bool $directMessage = false): Notice
{
$id = $object['id']; // int
$url = isset($object['url']) ? $object['url'] : $id; // string
@ -141,17 +141,6 @@ class Activitypub_notice
$settings['longitude'] = $object['longitude'];
}
// Ensure Actor Profile
if (is_null($actor_profile)) {
if (isset($object['attributedTo'])) {
$actor_profile = ActivityPub_explorer::get_profile_from_url($object['attributedTo']);
} elseif (isset($object['actor'])) {
$actor_profile = ActivityPub_explorer::get_profile_from_url($object['actor']);
} else {
throw new Exception("A notice can't be created without an actor.");
}
}
$act = new Activity();
$act->verb = ActivityVerb::POST;
$act->time = time();