The NixOS audit package must be installed.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-268090	SRG-OS-000037-GPOS-00015	ANIX-00-000160	SV-268090r1039158_rule	2024-10-25	1

Description
Without establishing what type of events occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisfy this requirement includes, for example, time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, filenames involved, and access control or flow control rules invoked. Associating event types with detected events in the operating system audit logs provides a means of investigating an attack; recognizing resource utilization or capacity thresholds; or identifying an improperly configured operating system. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000038-GPOS-00016, SRG-OS-000039-GPOS-00017, SRG-OS-000040-GPOS-00018, SRG-OS-000041-GPOS-00019, SRG-OS-000042-GPOS-00021, SRG-OS-000054-GPOS-00025, SRG-OS-000055-GPOS-00026, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000255-GPOS-00096, SRG-OS-000303-GPOS-00120, SRG-OS-000327-GPOS-00127

Description

Without establishing what type of events occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisfy this requirement includes, for example, time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, filenames involved, and access control or flow control rules invoked. Associating event types with detected events in the operating system audit logs provides a means of investigating an attack; recognizing resource utilization or capacity thresholds; or identifying an improperly configured operating system. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000038-GPOS-00016, SRG-OS-000039-GPOS-00017, SRG-OS-000040-GPOS-00018, SRG-OS-000041-GPOS-00019, SRG-OS-000042-GPOS-00021, SRG-OS-000054-GPOS-00025, SRG-OS-000055-GPOS-00026, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000255-GPOS-00096, SRG-OS-000303-GPOS-00120, SRG-OS-000327-GPOS-00127

ℹ️ Check
Verify that NixOS has the audit service is installed with the following command: $ nix-store --query --requisites /run/current-system \| cut -d- -f2- \| sort \| uniq \| grep audit audit-3.1.2 audit-3.1.2-bin audit-3.1.2-man audit-start audit-stop unit-auditd.service unit-audit.service If the "audit" package is not installed, this is a finding.

✔️ Fix
Configure NixOS to have the audit service package. Add the following Nix code to the NixOS Configuration, usually located in /etc/nixos/configuration.nix: environment.systemPackages = [ audit ]; Rebuild the NixOS configuration with the following command: $ sudo nixos-rebuild switch