The Ubuntu operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting local or remote access to the system via a graphical user logon.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-75393	UBTU-16-010020	SV-90073r2_rule		Medium

Description
Display of a standardized and approved use notification before granting access to the Ubuntu operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist. The banner must be formatted in accordance with applicable DoD policy. Use the following verbiage for Ubuntu operating systems that can accommodate banners of 1300 characters: "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." Use the following verbiage for Ubuntu operating systems that have severe limitations on the number of characters that can be displayed in the banner: "I've read & consent to terms in IS user agreem't." Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088

Description

Display of a standardized and approved use notification before granting access to the Ubuntu operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist. The banner must be formatted in accordance with applicable DoD policy. Use the following verbiage for Ubuntu operating systems that can accommodate banners of 1300 characters: "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." Use the following verbiage for Ubuntu operating systems that have severe limitations on the number of characters that can be displayed in the banner: "I've read & consent to terms in IS user agreem't." Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088

STIG	Date
Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide	2018-07-18

Details

Check Text ( C-75137r2_chk )
Verify the Ubuntu operating system security patches and updates are installed and up to date. Updates are required to be applied with a frequency determined by the site or Program Management Office (PMO). Obtain the list of available package security updates from Ubuntu. The URL for updates is https://www.Ubuntu.com/usn/. It is important to note that updates provided by Ubuntu may not be present on the system if the underlying packages are not installed. Check that the available package security updates have been installed on the system with the following command: # /usr/lib/update-notifier/apt-check --human-readable 246 packages can be updated. 0 updates are security updates. If security package updates have not been performed on the system within the timeframe that the site/program documentation requires, this is a finding. Typical update frequency may be overridden by Information Assurance Vulnerability Alert (IAVA) notifications from JFHQ-DoDIN. If the Ubuntu operating system is in non-compliance with the Information Assurance Vulnerability Management (IAVM) process, this is a finding.

Check Text ( C-75137r2_chk )

Verify the Ubuntu operating system security patches and updates are installed and up to date. Updates are required to be applied with a frequency determined by the site or Program Management Office (PMO).

Obtain the list of available package security updates from Ubuntu. The URL for updates is https://www.Ubuntu.com/usn/. It is important to note that updates provided by Ubuntu may not be present on the system if the underlying packages are not installed.

Check that the available package security updates have been installed on the system with the following command:

# /usr/lib/update-notifier/apt-check --human-readable

246 packages can be updated.
0 updates are security updates.

If security package updates have not been performed on the system within the timeframe that the site/program documentation requires, this is a finding.

Typical update frequency may be overridden by Information Assurance Vulnerability Alert (IAVA) notifications from JFHQ-DoDIN.

If the Ubuntu operating system is in non-compliance with the Information Assurance Vulnerability Management (IAVM) process, this is a finding.

Fix Text (F-82021r1_fix)
Configure the Ubuntu operating system to display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system. Create a database that will contain the system wide graphical user logon settings (if it does not already exist) with the following command: # sudo touch /etc/dconf/db/local.d/01-banner-message Add the following line to the "[org/gnome/login-screen]" section of the "/etc/dconf/db/local.d/01-banner-message" file: [org/gnome/login-screen] banner-message-enable=true

Fix Text (F-82021r1_fix)

Configure the Ubuntu operating system to display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system.

Create a database that will contain the system wide graphical user logon settings (if it does not already exist) with the following command:

# sudo touch /etc/dconf/db/local.d/01-banner-message

Add the following line to the "[org/gnome/login-screen]" section of the "/etc/dconf/db/local.d/01-banner-message" file:

[org/gnome/login-screen]
banner-message-enable=true