usd-2022-0010 | Broken Access Control in Filerun (Update 20220202)
Advisory ID: usd-2022-0010
Affected Version: <= Update 20220202
Vulnerability Type: CWE-284: Improper Access Control
Security Risk: Medium
Vendor URL: https://filerun.com
Vendor acknowledged vulnerability: Yes
Vendor Status: Fixed
Filerun allows users to place comments on their uploaded files. Due to improper access control, any user can delete comments on files.
Proof of Concept
In the following, an exemplary request to delete a comment is given:
POST /?module=comments§ion=ajax&page=remove HTTP/1.1
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
By setting the parameter commentId a user can delete any comment, even if the user does not own it.
It is recommended to restrict access to sensitive functions or information by default. Required access privileges should be granted explicitly by a global access control mechanism. Only allow required users to remove comments (e.g. file owner and shared users).
- 2022-04-22: Vulnerability identified by Christian Pöschl
- 2022-04-25: First contact request via email@example.com
- 2022-04-29: Vulnerability details submitted to Vendor
- 2022-05-10: Fixed by Vendor
- 2022-10-31: This advisory is published
This security vulnerability was found by Christian Pöschl of usd AG.