Drupal core 7.x versions before 7.57 when using Drupal's private file
system, Drupal will check to make sure a user has access to a file before
allowing the user to view or download it. This check fails under certain
conditions in which one module is trying to grant access to the file and
another is trying to deny it, leading to an access bypass vulnerability.
This vulnerability is mitigated by the fact that it only occurs for unusual
site configurations.
Upstream:released (7.57-1)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was needed)
Ubuntu 16.04 LTS (Xenial Xerus):needed
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 20.04 LTS (Focal Fossa):DNE
Ubuntu 20.10 (Groovy Gorilla):DNE
More Information

Updated: 2020-09-09 21:36:01 UTC (commit b67d7d8b03f173f825cd706df5bd078bca500b0e)