Entities of the File Abstraction Layer (FAL) could be persisted directly via DataHandler
. This allowed attackers to reference files in the fallback storage directly and retrieve their file names and contents. The fallback storage ("zero-storage") is used as a backward compatibility layer for files located outside properly configured file storages and within the public web root directory. Exploiting this vulnerability requires a valid backend user account.
Update to TYPO3 versions 8.7.57 ELTS, 9.5.46 ELTS, 10.4.43 ELTS, 11.5.35 LTS, 12.4.11 LTS, 13.0.1 that fix the problem described.
When persisting entities of the File Abstraction Layer directly via DataHandler, sys_file
entities are now denied by default, and sys_file_reference
& sys_file_metadata
entities are not permitted to reference files in the fallback storage anymore.
When importing data from secure origins, this must be explicitly enabled in the corresponding DataHandler instance by using $dataHandler->isImporting = true;
.
Thanks to TYPO3 core & security team member Oliver Hader who reported and fixed the issue.
{ "nvd_published_at": "2024-02-13T23:15:09Z", "cwe_ids": [ "CWE-200", "CWE-284" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2024-02-13T17:29:03Z" }