Description
Froxlor is open source server administration software. Version 2.3.6 lets administrators configure `system.available_shells` as the approved shell list that customers may assign to FTP users. However, the server-side FTP account handlers do not enforce that whitelist when processing add or edit requests. As a result, an authenticated customer with shell delegation enabled can submit an arbitrary shell such as `/bin/bash` even when the panel UI only offers more restricted choices. In deployments that use the default `nssextrausers` integration, the attacker-controlled shell is then propagated into the system account database, leading to real host shell access. Version 2.3.7 fixes the issue.
Problem types
CWE-863: Incorrect Authorization
Product status
References
github.com/...roxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
github.com/...roxlor/security/advisories/GHSA-gcv3-5v9q-fmhh
github.com/froxlor/froxlor/releases/tag/2.3.7