NixOS must store only encrypted representations of passwords.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-268130 | ANIX-00-000770 | SV-268130r1039278_rule | CCI-004062 | high |
| Description | ||||
| Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. | ||||
| STIG | Date | |||
| Anduril NixOS Security Technical Implementation Guide | 2024-10-25 | |||
Details
Check Text (C-268130r1039278_chk)
Verify NixOS stores only encrypted representations of passwords with the following command:
$ grep ENCRYPT_METHOD /etc/login.defs
ENCRYPT_METHOD SHA512
If "ENCRYPT_METHOD" does not equal SHA512 or greater, is commented out, or is missing, this is a finding.
Fix Text (F-71957r1039277_fix)
Configure NixOS to store only encrypted representations of passwords.
Add/modify /etc/nixos/configuration.nix to include the following lines:
environment.etc."login.defs".text = pkgs.lib.mkForce ''
ENCRYPT_METHOD SHA256
'';
Rebuild the system with the following command:
$ sudo nixos-rebuild switch