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GHSA-58xv-7h9r-mx3cmediumNo CVE assigned

Drupal Malicious file upload with filenames stating with dot

Impact

Drupal 8 core's file_save_upload() function does not strip the leading and trailing dot ('.') from filenames, like Drupal 7 did.

Source excerpt · OSV

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

drupal/drupal Packagist
Affected rangeRecorded fix
From 8.0.0 before 8.7.11Ecosystem versions8.7.11
From 8.8.0 before 8.8.1Ecosystem versions8.8.1

Version evidence: OSV · GHSA-58xv-7h9r-mx3c

View original version evidence (121 explicit versions)

Original source 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.

References