GHSA-58xv-7h9r-mx3c Drupal Malicious file upload with filenames stating with dot
Authenticated users with upload permissions can bypass security protections by uploading files with leading dots, such as .htaccess, due to missing filename sanitization.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-58xv-7h9r-mx3c?
GHSA-58xv-7h9r-mx3c is a vulnerability in drupal/drupal, published on 15 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Drupal 8 core's file_save_upload() function does not strip the leading and trailing dot ('.') from filenames, like Drupal 7 did.
Users with the ability to upload files with any extension in conjunction with contributed modules may be able to use this to upload system files such as .htaccess in order to bypass protections afforded by Drupal's default .htaccess file.
After this fix, file_save_upload() now trims leading and trailing dots from filenames.
Which versions are affected by GHSA-58xv-7h9r-mx3c?
4 open source packages ship an affected version, including drupal/drupal.
| Package | Affected | Fixed in |
|---|---|---|
drupal/drupal Packagist | From 8.0.0 | 8.7.11 |
drupal/drupal Packagist | From 8.0.0 | 8.7.11 |
drupal/drupal Packagist | From 8.8.0 | 8.8.1 |
drupal/drupal Packagist | From 8.8.0 | 8.8.1 |
How do I fix GHSA-58xv-7h9r-mx3c?
Upgrade drupal/drupal to a fixed version for your release line: 8.7.11 or 8.8.1.
Is GHSA-58xv-7h9r-mx3c being exploited?
There is no known exploitation of GHSA-58xv-7h9r-mx3c in the wild and no public exploit code.