STIGQter: STIG Summary: SUSE Linux Enterprise Server 15 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

The SUSE operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting access via SSH.

DISA Rule

SV-234805r622137_rule

Vulnerability Number

V-234805

Group Title

SRG-OS-000023-GPOS-00006

Rule Version

SLES-15-010040

Severity

CAT II

CCI(s)

• CCI-000048 - The information system displays an organization-defined system use notification message or banner before granting access to the system that provides privacy and security notices consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance.
• CCI-001384 - The information system, for publicly accessible systems, displays system use information organization-defined conditions before granting further access.
• CCI-001385 - The information system, 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 - The information system, 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 - The information system, 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 - The information system, for publicly accessible systems, includes a description of the authorized uses of the system.

Weight

10

Fix Recommendation

Configure the SUSE operating system to display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system by running the following commands:

Edit the "sshd_config" file and edit the Banner flag to be the following:

Banner /etc/issue/

Restart the sshd daemon:

> sudo systemctl restart sshd.service

To configure the system logon banner, edit the "/etc/issue" file. Replace the default text inside with the Standard Mandatory DoD banner text:

"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."

Check Contents

Verify the SUSE operating system displays the Standard Mandatory DoD Notice and Consent Banner before granting access to the system via SSH.

Check the issue file to verify it contains one of the DoD required banners. If it does not, this is a finding.

> more /etc/issue

The output must display the following DoD-required banner text:

"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 output does not display the banner text, this is a finding.

Check the banner setting for sshd_config:

> sudo grep "Banner" /etc/ssh/sshd_config

The output must show the value of "Banner" set to "/etc/issue". An example is shown below:

> sudo grep "Banner" /etc/ssh/sshd_config
Banner /etc/issue

If it does not, this is a finding.

Vulnerability Number

V-234805

Documentable

False

Rule Version

SLES-15-010040

Severity Override Guidance

Verify the SUSE operating system displays the Standard Mandatory DoD Notice and Consent Banner before granting access to the system via SSH.

Check the issue file to verify it contains one of the DoD required banners. If it does not, this is a finding.

> more /etc/issue

The output must display the following DoD-required banner text:

"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 output does not display the banner text, this is a finding.

Check the banner setting for sshd_config:

> sudo grep "Banner" /etc/ssh/sshd_config

The output must show the value of "Banner" set to "/etc/issue". An example is shown below:

> sudo grep "Banner" /etc/ssh/sshd_config
Banner /etc/issue

If it does not, this is a finding.

Check Content Reference

M

Target Key

5274

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