Canonical Ubuntu 24.04 LTS STIG

Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide

The Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide (V1 R6) has 194 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R6

ArchivedPublished Wed Jul 01 2026

Ubuntu 24.04 LTS must be configured to enforce the acknowledgement of the Standard Mandatory DOD Notice and Consent Banner for all SSH connections.

Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide

Assessment Title

Rule Text

Ubuntu 24.04 LTS must be configured to enforce the acknowledgement of the Standard Mandatory DOD Notice and Consent Banner for all SSH connections.

Description

Discussion Text

The banner must be acknowledged by the user prior to allowing the user access to Ubuntu 24.04 LTS. This provides assurance that the user has seen the message and accepted the conditions for access. If the consent banner is not acknowledged by the user, DOD will not be in compliance with system use notifications required by law.

Ubuntu 24.04 LTS must prevent further activity until the user executes a positive action to manifest agreement.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-270694

Rule

SV-270694r1066571_rule

Severity

medium

Rule Version

UBTU-24-200680

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify Ubuntu 24.04 LTS is configured to prompt a user to acknowledge the Standard Mandatory DOD Notice and Consent Banner before granting access with the following command:

$ less /etc/profile.d/ssh_confirm.sh
#!/bin/bash

if [ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ]; then
        while true; do
                read -p " 


You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only.

By using this IS (which includes any device attached to this IS), you consent to the following conditions:

-The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations.

-At any time, the USG may inspect and seize data stored on this IS.

-Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose.

-This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy.

-Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details.

Do you agree? [y/N] " yn
                case $yn in
                        [Yy]* ) break ;;
                        [Nn]* ) exit 1 ;;
                esac
        done
fi

If the output does not match the text above, this is a finding.

Implementation Procedure

Fix Text

Configure Ubuntu 24.04 LTS to prompt a user to acknowledge the Standard Mandatory DOD Notice and Consent Banner before granting access:

$ sudo vi /etc/profile.d/ssh_confirm.sh
#!/bin/bash

if [ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ]; then
        while true; do
                read -p " 

You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only.

By using this IS (which includes any device attached to this IS), you consent to the following conditions:

-The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations.

-At any time, the USG may inspect and seize data stored on this IS.

-Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose.

-This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy.

-Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details.

Do you agree? [y/N] " yn
                case $yn in
                        [Yy]* ) break ;;
                        [Nn]* ) exit 1 ;;
                esac
        done
fi

Note: The "ssh_confirm.sh" script is provided as a supplemental file to this document.

STIG check 50 of 194 in the Canonical Ubuntu 24.04 LTS STIG checklist

← Previous · V-270693Ubuntu 24.04 LTS must display the Standard Mandatory DOD Notice and Consent Banner before granting local access to the system via a graphical user logon.Next · V-270695 →Ubuntu 24.04 LTS Advance Package Tool (APT) must be configured to prevent the installation of patches, service packs, device drivers, or Ubuntu 24.04 LTS components without verification they have been digitally signed using a certificate that is recognized and approved by the organization.