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NixOS must employ strong authenticators in the establishment of nonlocal maintenance and diagnostic sessions.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-268176ANIX-00-001960SV-268176r1131160_ruleCCI-000877high
Description
If maintenance tools are used by unauthorized personnel, they may accidentally or intentionally damage or compromise the system. The act of managing systems and applications includes the ability to access sensitive application information, such as system configuration details, diagnostic information, user information, and potentially sensitive application data. Some maintenance and test tools are either standalone devices with their own operating systems or are applications bundled with an operating system. Nonlocal maintenance and diagnostic activities are those activities conducted by individuals communicating through a network, either an external network (e.g., the internet) or an internal network. Local maintenance and diagnostic activities are those activities carried out by individuals physically present at the information system or information system component and not communicating across a network connection. Typically, strong authentication requires authenticators that are resistant to replay attacks and employ multifactor authentication. Strong authenticators include, for example, PKI where certificates are stored on a token protected by a password, passphrase, or biometric.
STIGDate
Anduril NixOS Security Technical Implementation Guide2025-08-19

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (3) 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.

MNT-05Remote Maintenance
0.50
MNT-05.1Auditing Remote Maintenance
0.50
MNT-05.2Remote Maintenance Notifications
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (44) 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-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(11)Usage Conditions
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00
AC-3Access Enforcement
1.00
AC-3(4)Discretionary Access Control
1.00
AC-7Unsuccessful Logon Attempts
1.00

+34 more (top 10 by confidence shown)

NIST 800-1710 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.

3.7.5
1.00
CCI1 mapping
CCI-000877
1.00

Details

Check Text (C-268176r1131160_chk)

Verify NixOS employs strong authentication in the establishment of nonlocal sessions with SSH by the following command: $ sudo /run/current-system/sw/bin/sshd -G | grep pam usepam yes If usepam is not yes, this is a finding.

Fix Text (F-72003r1131159_fix)

Configure NixOS to use strong authentication when establishing nonlocal maintenance and diagnostic sessions. Add the following Nix code to the NixOS Configuration, usually located in /etc/nixos/configuration.nix or /etc/nixos/flake.nix: openssh.settings.UsePAM = ''yes''; Rebuild and switch to the new NixOS configuration: $ sudo nixos-rebuild switch