vantage6-server node accepts non-whitelisted algorithms from malicious server

Impact

A node does not check if an image is allowed to run if a parent_id is set. A malicious party that breaches the server may modify it to set a fake parent_id and send a task of a non-whitelisted algorithm. The node will then execute it because the parent_id that is set prevents checks from being run. Relevant node code here

This impacts all servers that are breached by an expert user

Patches

Fixed in v4.1.2

Workarounds

None