From SLES 12 Security Technical Implementation Guide
Part of SRG-OS-000023-GPOS-00006
Associated with: CCI-000048
Display of a standardized and approved use notification before granting access to the SUSE operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance.
Verify the SUSE operating system displays the Standard Mandatory DoD Notice and Consent Banner before granting access to the system via VSFTP. Check the issue file to verify that 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 in vsftpd.conf: # sudo grep "ftpd_banner" /etc/vsftpd.conf The output must show the value of "ftpd_banner" set to "/etc/issue". An example is shown below: # sudo grep Banner" /etc/vsftpd.conf ftpd_banner=/etc/issue If the output does not show the value of "ftpd_banner" set to "/etc/issue", this is a finding.
Configure the SUSE operating system to display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system via VSFTP by running the following commands: Edit the "vsftpd.conf" file: # sudo sed -i 's/^.*\bftpd_banner\b.*$/ftpd_banner=\/etc\/issue/' /etc/vsftpd.conf Restart the vsftp daemon: # sudo systemctl restart vsftpd.service If "/etc/issue" does not contain the Standard Mandatory DoD banner, add the following text to "/etc/issue": "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."
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