FileBrowser versions before 2.63.19 fail to enforce the declared Upload-Length in the TUS resumable-upload PATCH endpoint, allowing authenticated users to write arbitrary data to disk. Attackers can send oversized request bodies that exceed the declared upload length to exhaust available disk space and cause service unavailability.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
filebrowser:filebrowser
References 3
https://github.com/filebrowser/filebrowser/commit/4daddec6f200b03a721197d8c0b4b…
disclosure@vulncheck.com
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-ffv3-7h97-9…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/filebrowser-before-disk-exhaustion-via-tus…
disclosure@vulncheck.com