Title

NixOS system configuration files must have a mode of "0644" or less permissive. (Cat II impact)

Discussion

Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.

Check Content

Verify that the NixOS system configuration files have a mode of "0644" or less permissive with the following command: $ sudo find /etc/nixos -type f -exec stat -c "%a %n" {} \; 644 /etc/nixos/configuration.nix 644 /etc/nixos/hardware-configuration.nix If the system configuration files have a mode more permissive than "0644", this is a finding.

Fix Text

Configure the NixOS system configuration files to have a mode of "0644" or less permissive by using the following command: $ sudo find /etc/nixos -type f -exec chmod -R 644 {} \; Rebuild the NixOS configuration with the following command: $ sudo nixos-rebuild switch

Additional Identifiers

Rule ID: SV-268120r1039248_rule

Vulnerability ID: V-268120

Group Title: SRG-OS-000063-GPOS-00032

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.