Check: ANIX-00-000030
Anduril NixOS STIG:
ANIX-00-000030
(in version v1 r1)
Title
NixOS must enable the audit daemon. (Cat II impact)
Discussion
Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an account. Auditing account creation actions provides logging that can be used for forensic purposes. Note: For the "security.audit.enable" configuration, both "true" and "lock" are valid values. The "true" value allows for loading of audit rules (synonymous with "-e 1" in audit rules), while the "lock" value loads audit rules and enforces that the rules cannot be changed without the system rebooting (synonymous with "-e 2"). Setting this value to "lock" is recommended to be performed as the final step in configuring the audit daemon. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000254-GPOS-00095, SRG-OS-000344-GPOS-00135, SRG-OS-000348-GPOS-00136, SRG-OS-000349-GPOS-00137, SRG-OS-000350-GPOS-00138, SRG-OS-000351-GPOS-00139, SRG-OS-000352-GPOS-00140, SRG-OS-000353-GPOS-00141, SRG-OS-000354-GPOS-00142, SRG-OS-000122-GPOS-00063, SRG-OS-000358-GPOS-00145
Check Content
Verify NixOS has the audit service configured with the following command: $ grep security.audit /etc/nixos/configuration.nix security.auditd.enable = true; security.audit.enable = true; If auditd, and audit are not set to true or lock, this is a finding.
Fix Text
Configure the system to enable the audit service by adding or updating the following configurations in /etc/nixos/configuration.nix: security.auditd.enable = true; security.audit.enable = true; Rebuild the system with the following command: $ sudo nixos-rebuild switch
Additional Identifiers
Rule ID: SV-268080r1039128_rule
Vulnerability ID: V-268080
Group Title: SRG-OS-000004-GPOS-00004
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000018 |
Automatically audit account creation actions. |
| CCI-001464 |
Initiates session audits automatically at system start-up. |
| CCI-001858 |
Provide an alert in an organization-defined real-time-period to organization-defined personnel, roles, and/or locations when organization-defined audit failure events requiring real-time alerts occur. |
| CCI-001875 |
Provide an audit reduction capability that supports on-demand audit review and analysis. |
| CCI-001876 |
Provide an audit reduction capability that supports on-demand reporting requirements. |
| CCI-001877 |
Provide an audit reduction capability that supports after-the-fact investigations of incidents. |
| CCI-001878 |
Provide a report generation capability that supports on-demand audit review and analysis. |
| CCI-001879 |
Provide a report generation capability that supports on-demand reporting requirements. |
| CCI-001880 |
Provide a report generation capability that supports after-the-fact investigations of security incidents. |
| CCI-001881 |
Provide an audit reduction capability that does not alter original content or time ordering of audit records. |
| CCI-001882 |
Provide a report generation capability that does not alter original content or time ordering of audit records. |
| CCI-001889 |
Record time stamps for audit records that meet organization-defined granularity of time measurement. |