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V-268131

CAT I (High)

NixOS must not have the telnet package installed.

Rule ID

SV-268131r1131067_rule

STIG

Anduril NixOS Security Technical Implementation Guide

Version

V1R2

CCIs

CCI-000197

Discussion

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.

Check Content

Ensure the telnet package is not installed and available with the following command:

$ whereis telnet

telnet:

If there is a path, and the output looks like "telnet: /nix/store/sqiphymcpky1yysgdc1aj4lr9jg9n53a-inetutils-2.2/bin/telnet", this is a finding.

Fix Text

Edit the NixOS Configuration file /etc/nixos/configuration.nix or /etc/nixos/flake.nix and remove any references to pkgs.libtelnet, pkgs.busybox, or pkgs.inetutils from the environment.systemPackages list.

Rebuild and switch to the new NixOS configuration:
$ sudo nixos-rebuild switch