STIGQter: STIG Summary: Riverbed NetIM OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 11 Sep 2025:

Ubuntu OS must display the Standard Mandatory DOD Notice and Consent Banner before granting any user connection to the OS.

DISA Rule

SV-275619r1147907_rule

Vulnerability Number

V-275619

Group Title

SRG-OS-000228-GPOS-00088

Rule Version

RIIM-OS-255020

Severity

CAT II

CCI(s)

• CCI-001384 - For publicly accessible systems, display system use information with organization-defined conditions before granting further access to the publicly accessible system.
• CCI-001385 - For publicly accessible systems, displays references, if any, to monitoring that are consistent with privacy accommodations for such systems that generally prohibit those activities.
• CCI-001386 - For publicly accessible systems, displays references, if any, to recording that are consistent with privacy accommodations for such systems that generally prohibit those activities.
• CCI-001387 - For publicly accessible systems, displays references, if any, to auditing that are consistent with privacy accommodations for such systems that generally prohibit those activities.
• CCI-001388 - For publicly accessible systems, includes a description of the authorized uses of the system.
• CCI-000048 - Display an organization-defined system use notification message or banner to users before granting access to the system that provides privacy and security notices consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidelines.
• CCI-000050 - Retain the notification message or banner on the screen until users acknowledge the usage conditions and take explicit actions to log on to or further access the system.

Weight

10

Fix Recommendation

Set the parameter Banner in "/etc/ssh/sshd_config" to point to the "/etc/issue.net" file:

$ sudo sed -i '/^Banner/d' /etc/ssh/sshd_config
$ sudo sed -i '$aBanner /etc/issue.net' /etc/ssh/sshd_config

Replace the text in "/etc/issue.net" with the Standard Mandatory DOD Notice and Consent Banner:

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.

Restart the SSH daemon for the changes to take effect and then signal the SSH server to reload the configuration file:

$ sudo systemctl -s SIGHUP kill sshd

Check Contents

Verify Ubuntu 22.04 LTS displays the Standard Mandatory DOD Notice and Consent Banner before granting access to Ubuntu 22.04 LTS via an SSH logon by using the following command:

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH 'banner'
/etc/ssh/sshd_config:Banner /etc/issue.net

The command will return the banner option along with the name of the file that contains the SSH banner. If the line is commented out, missing, or conflicting results are returned, this is a finding.

Verify the specified banner file matches the Standard Mandatory DOD Notice and Consent Banner exactly:

$ cat /etc/issue.net
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.

If the banner text does not match the Standard Mandatory DOD Notice and Consent Banner exactly, this is a finding.

Vulnerability Number

V-275619

Documentable

False

Rule Version

RIIM-OS-255020

Severity Override Guidance

Verify Ubuntu 22.04 LTS displays the Standard Mandatory DOD Notice and Consent Banner before granting access to Ubuntu 22.04 LTS via an SSH logon by using the following command:

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH 'banner'
/etc/ssh/sshd_config:Banner /etc/issue.net

The command will return the banner option along with the name of the file that contains the SSH banner. If the line is commented out, missing, or conflicting results are returned, this is a finding.

Verify the specified banner file matches the Standard Mandatory DOD Notice and Consent Banner exactly:

$ cat /etc/issue.net
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.

If the banner text does not match the Standard Mandatory DOD Notice and Consent Banner exactly, this is a finding.

Check Content Reference

M

Target Key

5706