NixOS must generate audit records when successful/unsuccessful attempts to delete privileges occur.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-268164 | SRG-OS-000466-GPOS-00210 | ANIX-00-001730 | SV-268164r1131133_rule | 2025-08-19 | 1 |
| Description |
|---|
| Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). |
| ℹ️ Check |
|---|
| Verify NixOS generates audit records when attempts to delete privileges occur with the following command: $ sudo auditctl -l | grep usermod -a always,exit -S all -F path=/run/current-system/sw/bin/usermod -F perm=x -F auid>=1000 -F auid!=-1 -k privileged-usermod If the command does not return an audit rule for "usermod", this is a finding. |
| ✔️ Fix |
|---|
| Configure NixOS to record attempts to delete privileges. Add the following Nix code to the NixOS Configuration, usually located in /etc/nixos/configuration.nix or /etc/nixos/flake.nix: security.audit.rules = [ "-a always,exit -F path=/run/current-system/sw/bin/usermod -F perm=x -F auid>=1000 -F auid!=unset -k privileged-usermod" ]; Rebuild and switch to the new NixOS configuration: $ sudo nixos-rebuild switch |