Altium Enterprise Server ComparisonService Path Traversal Vulnerability Allowing Remote Code Execution

A path traversal vulnerability has been identified in the Altium Enterprise Server ComparisonService. This issue arises from inadequate filename sanitization in the Gerber file upload APIs. An authenticated workspace user can exploit this vulnerability by sending a crafted filename in the multipart Content-Disposition header, allowing them to escape the designated temporary upload directory and write arbitrary files to any location on the server filesystem. Since the uploaded files can be directed to web-accessible directories, this vulnerability could be escalated to remote code execution under the service account. Additionally, it could be used to overwrite application binaries or configuration files, potentially leading to service takeover or denial of service.

Impact

Exploitation of this vulnerability could result in unauthorized file writes, remote code execution in the context of the service account, or overwriting critical application files, causing service disruption or takeover.