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NixOS must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-268174ANIX-00-001930SV-268174r1131156_ruleCCI-003627medium
Description
Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potentially obtain undetected access to the system. Owners of inactive accounts will not notice if unauthorized access to their user account has been obtained. Operating systems need to track periods of inactivity and disable application identifiers after 35 days of inactivity.
STIGDate
Anduril NixOS Security Technical Implementation Guide2025-08-19

Related Frameworks

1 mapping across 3 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

IAC-15.3Disable Inactive Accounts
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (68) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-10Concurrent Session Control
1.00
AC-17(10)Authenticate Remote Commands
1.00
AC-2Account Management
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(10)Shared and Group Account Credential Change
1.00
AC-2(11)Usage Conditions
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00
AC-2(7)Privileged User Accounts
1.00

+58 more (top 10 by confidence shown)

CCI1 mapping
CCI-003627
1.00

Details

Check Text (C-268174r1131156_chk)

Verify NixOS disables account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity with the following command: $ grep -i inactive /etc/default/useradd INACTIVE=35 If INACTIVE is not set to 35 or less, or is missing or commented out, this is a finding.

Fix Text (F-72001r1131155_fix)

Configure NixOS to disable inactive users. Add the following Nix code to the NixOS Configuration, usually located in /etc/nixos/configuration.nix or /etc/nixos/flake.nix: Ensure the lib functions are available: { config, lib, ... }: environment.etc."/default/useradd".text = lib.mkForce '' INACTIVE=35 ''; Rebuild and switch to the new NixOS configuration: $ sudo nixos-rebuild switch