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[stable28] fix: Apply checks on shares in the middleware #6487

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merged 1 commit into from
Oct 2, 2024
Merged

[stable28] fix: Apply checks on shares in the middleware #6487

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21 changes: 21 additions & 0 deletions lib/Middleware/SessionMiddleware.php
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Original file line number Diff line number Diff line change
Expand Up @@ -16,10 +16,12 @@
use OCP\AppFramework\Http\JSONResponse;
use OCP\AppFramework\Http\Response;
use OCP\AppFramework\Middleware;
use OCP\Constants;
use OCP\Files\IRootFolder;
use OCP\Files\NotPermittedException;
use OCP\IL10N;
use OCP\IRequest;
use OCP\ISession;
use OCP\IUserSession;
use OCP\Share\Exceptions\ShareNotFound;
use OCP\Share\IManager as ShareManager;
Expand All @@ -31,6 +33,7 @@ public function __construct(
private IRequest $request,
private SessionService $sessionService,
private DocumentService $documentService,
private ISession $session,
private IUserSession $userSession,
private IRootFolder $rootFolder,
private ShareManager $shareManager,
Expand Down Expand Up @@ -126,10 +129,28 @@ private function assertUserOrShareToken(ISessionAwareController $controller): vo
} catch (ShareNotFound) {
throw new InvalidSessionException();
}

// Check if shareToken has access to document
if (count($this->rootFolder->getUserFolder($share->getShareOwner())->getById($documentId)) === 0) {
throw new InvalidSessionException();
}

/** @psalm-suppress RedundantConditionGivenDocblockType */
if ($share->getPassword() !== null) {
$shareId = $this->session->get('public_link_authenticated');
if ($share->getId() !== $shareId) {
throw new InvalidSessionException();
}
}

if (($share->getPermissions() & Constants::PERMISSION_READ) !== Constants::PERMISSION_READ) {
throw new InvalidSessionException();
}

$attributes = $share->getAttributes();
if ($attributes !== null && $attributes->getAttribute('permissions', 'download') === false) {
throw new InvalidSessionException();
}
} else {
throw new InvalidSessionException();
}
Expand Down
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