STIGQter STIGQter: STIG Summary: IBM AIX 7.x Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

The Department of Defense (DoD) login banner must be displayed immediately prior to, or as part of, graphical desktop environment login prompts on AIX.

DISA Rule

SV-215201r508663_rule

Vulnerability Number

V-215201

Group Title

SRG-OS-000023-GPOS-00006

Rule Version

AIX7-00-001042

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Edit the "Xresources" file to configure the system to display one of the DoD login banners (based on the character limitations imposed by the system) prior to, or as part of, the graphical desktop environment login process.

For "Dtlogin", change the variable "Dtlogin*greeting.labelString:" in "Xresources" file.

# cp /usr/dt/config/C/Xresources /etc/dt/config/en_US/Xresources

# vi /etc/dt/config/en_US/Xresources

Set variable "Dtlogin*greeting.labelString" as the following:
Dtlogin*greeting.labelString: You are accessing a U.S. Government (USG) Information System (IS) that\nis provided for USG-authorized use only.\n\nBy using this IS (which includes any device attached to this IS), you\nconsent to the following conditions: \n\n-The USG routinely intercepts and monitors communications on this IS\nfor purposes including, but not limited to, penetration testing, COMSEC\nmonitoring, network operations and defense, personnel misconduct (PM),\nlaw enforcement (LE), and counterintelligence (CI) investigations. \n\n-At any time, the USG may inspect and seize data stored on this IS. \n\n-Communications using, or data stored on, this IS are not private, are\nsubject to routine monitoring, interception, and search, and may be\ndisclosed or used for any USG-authorized purpose. \n\n-This IS includes security measures (e.g., authentication and access\ncontrols) to protect USG interests--not for your personal benefit or\nprivacy. \n\n-Notwithstanding the above, using this IS does not constitute consent\nto PM, LE or CI investigative searching or monitoring of the content\nof privileged communications, or work product, related to personal\nrepresentation or services by attorneys, psychotherapists, or clergy,\nand their assistants. Such communications and work product are private\nand confidential. See User Agreement for details.

Save the above change to "Xresources" file.

Check Contents

If AIX CDE (X11) is not used, this is Not Applicable.

Check if file "/etc/dt/config/en_US/Xresources" exists:
# ls /etc/dt/config/en_US/Xresources

If the file does not exist, this is a finding.

Check if the "Dtlogin*greeting.labelString" is set to the Standard Mandatory DoD Notice and Consent Banner:
# grep "Dtlogin*greeting.labelString" /etc/dt/config/en_US/Xresources

The above command should display the following:
Dtlogin*greeting.labelString: You are accessing a U.S. Government (USG) Information System (IS) that\nis provided for USG-authorized use only.\n\nBy using this IS (which includes any device attached to this IS), you\nconsent to the following conditions: \n\n-The USG routinely intercepts and monitors communications on this IS\nfor purposes including, but not limited to, penetration testing, COMSEC\nmonitoring, network operations and defense, personnel misconduct (PM),\nlaw enforcement (LE), and counterintelligence (CI) investigations. \n\n-At any time, the USG may inspect and seize data stored on this IS. \n\n-Communications using, or data stored on, this IS are not private, are\nsubject to routine monitoring, interception, and search, and may be\ndisclosed or used for any USG-authorized purpose. \n\n-This IS includes security measures (e.g., authentication and access\ncontrols) to protect USG interests--not for your personal benefit or\nprivacy. \n\n-Notwithstanding the above, using this IS does not constitute consent\nto PM, LE or CI investigative searching or monitoring of the content\nof privileged communications, or work product, related to personal\nrepresentation or services by attorneys, psychotherapists, or clergy,\nand their assistants. Such communications and work product are private\nand confidential. See User Agreement for details.

If the "Dtlogin*greeting.labelString" variable is not set, or the label string does not contain the Standard Mandatory DoD Notice and Consent Banner, this is a finding.

Vulnerability Number

V-215201

Documentable

False

Rule Version

AIX7-00-001042

Severity Override Guidance

If AIX CDE (X11) is not used, this is Not Applicable.

Check if file "/etc/dt/config/en_US/Xresources" exists:
# ls /etc/dt/config/en_US/Xresources

If the file does not exist, this is a finding.

Check if the "Dtlogin*greeting.labelString" is set to the Standard Mandatory DoD Notice and Consent Banner:
# grep "Dtlogin*greeting.labelString" /etc/dt/config/en_US/Xresources

The above command should display the following:
Dtlogin*greeting.labelString: You are accessing a U.S. Government (USG) Information System (IS) that\nis provided for USG-authorized use only.\n\nBy using this IS (which includes any device attached to this IS), you\nconsent to the following conditions: \n\n-The USG routinely intercepts and monitors communications on this IS\nfor purposes including, but not limited to, penetration testing, COMSEC\nmonitoring, network operations and defense, personnel misconduct (PM),\nlaw enforcement (LE), and counterintelligence (CI) investigations. \n\n-At any time, the USG may inspect and seize data stored on this IS. \n\n-Communications using, or data stored on, this IS are not private, are\nsubject to routine monitoring, interception, and search, and may be\ndisclosed or used for any USG-authorized purpose. \n\n-This IS includes security measures (e.g., authentication and access\ncontrols) to protect USG interests--not for your personal benefit or\nprivacy. \n\n-Notwithstanding the above, using this IS does not constitute consent\nto PM, LE or CI investigative searching or monitoring of the content\nof privileged communications, or work product, related to personal\nrepresentation or services by attorneys, psychotherapists, or clergy,\nand their assistants. Such communications and work product are private\nand confidential. See User Agreement for details.

If the "Dtlogin*greeting.labelString" variable is not set, or the label string does not contain the Standard Mandatory DoD Notice and Consent Banner, this is a finding.

Check Content Reference

M

Target Key

4012

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