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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must enable the graphical user logon banner to display the Standard Mandatory DoD Notice and Consent Banner before granting local access to the system via a graphical user logon.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the Ubuntu operating system ensures privacy...
    Rule Medium Severity
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  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
    Group
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  • The Ubuntu operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting local access to the system via a graphical user logon.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the Ubuntu operating system ensures privacy...
    Rule Medium Severity
    Show

  • SRG-OS-000028-GPOS-00009

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must retain a user's session lock until that user reestablishes access using established identification and authentication procedures.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
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  • SRG-OS-000030-GPOS-00011

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must allow users to directly initiate a session lock for all connection types.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
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  • SRG-OS-000068-GPOS-00036

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must map the authenticated identity to the user or group account for PKI-based authentication.

    &lt;VulnDiscussion&gt;Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the indivi...
    Rule High Severity
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  • SRG-OS-000075-GPOS-00043

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  • The Ubuntu operating system must enforce 24 hours/1 day as the minimum password lifetime. Passwords for new users must have a 24 hours/1 day minimum password lifetime restriction.

    &lt;VulnDiscussion&gt;Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enfo...
    Rule Low Severity
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  • SRG-OS-000076-GPOS-00044

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  • The Ubuntu operating system must enforce a 60-day maximum password lifetime restriction. Passwords for new users must have a 60-day maximum password lifetime restriction.

    &lt;VulnDiscussion&gt;Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the ...
    Rule Low Severity
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  • SRG-OS-000080-GPOS-00048

    <GroupDescription></GroupDescription>
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  • Ubuntu operating systems when booted must require authentication upon booting into single-user and maintenance modes.

    &lt;VulnDiscussion&gt;To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-ap...
    Rule High Severity
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  • SRG-OS-000104-GPOS-00051

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must uniquely identify interactive users.

    &lt;VulnDiscussion&gt;To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to pre...
    Rule Medium Severity
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  • SRG-OS-000134-GPOS-00068

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must ensure only users who need access to security functions are part of sudo group.

    &lt;VulnDiscussion&gt;An isolation boundary provides access control and protects the integrity of the hardware, software, and firmware that perform...
    Rule High Severity
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  • SRG-OS-000279-GPOS-00109

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must automatically terminate a user session after inactivity timeouts have expired.

    &lt;VulnDiscussion&gt;Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of ...
    Rule Medium Severity
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  • SRG-OS-000373-GPOS-00156

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must require users to reauthenticate for privilege escalation or when changing roles.

    &lt;VulnDiscussion&gt;Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When oper...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00228

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  • The Ubuntu operating system default filesystem permissions must be defined in such a way that all authenticated users can read and modify only their own files.

    &lt;VulnDiscussion&gt;Setting the most restrictive default permissions ensures that when new accounts are created they do not have unnecessary acce...
    Rule Medium Severity
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  • SRG-OS-000105-GPOS-00052

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must implement smart card logins for multifactor authentication for local and network access to privileged and non-privileged accounts.

    &lt;VulnDiscussion&gt;Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifacto...
    Rule Medium Severity
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  • SRG-OS-000125-GPOS-00065

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must use strong authenticators in establishing nonlocal maintenance and diagnostic sessions.

    &lt;VulnDiscussion&gt;Nonlocal maintenance and diagnostic activities are those activities conducted by individuals communicating through a network,...
    Rule Medium Severity
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  • SRG-OS-000126-GPOS-00066

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must immediately terminate all network connections associated with SSH traffic after a period of inactivity.

    &lt;VulnDiscussion&gt;Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of ...
    Rule Medium Severity
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  • SRG-OS-000163-GPOS-00072

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  • The Ubuntu operating system must immediately terminate all network connections associated with SSH traffic at the end of the session or after 10 minutes of inactivity.

    &lt;VulnDiscussion&gt;Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take c...
    Rule Medium Severity
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  • SRG-OS-000228-GPOS-00088

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting any local or remote connection to the system.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the publicly accessible operating system en...
    Rule Medium Severity
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  • SRG-OS-000423-GPOS-00187

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must use SSH to protect the confidentiality and integrity of transmitted information.

    &lt;VulnDiscussion&gt;Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected commu...
    Rule High Severity
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  • SRG-OS-000424-GPOS-00188

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must configure the SSH daemon to use Message Authentication Codes (MACs) employing FIPS 140-2 approved cryptographic hashes to prevent the unauthorized disclosure of information and/or detect changes to information during transmission.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote a...
    Rule Medium Severity
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  • SRG-OS-000424-GPOS-00188

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must configure the SSH daemon to use FIPS 140-2 approved ciphers to prevent the unauthorized disclosure of information and/or detect changes to information during transmission.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote a...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00229

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must not allow unattended or automatic login via SSH.

    &lt;VulnDiscussion&gt;Failure to restrict system access to authenticated users negatively impacts Ubuntu operating system security.&lt;/VulnDiscuss...
    Rule High Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must be configured so that remote X connections are disabled, unless to fulfill documented and validated mission requirements.

    &lt;VulnDiscussion&gt;The security risk of using X11 forwarding is that the client's X11 display server may be exposed to attack when the SSH clien...
    Rule High Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system SSH daemon must prevent remote hosts from connecting to the proxy display.

    &lt;VulnDiscussion&gt;When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display ...
    Rule Medium Severity
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  • SRG-OS-000069-GPOS-00037

    <GroupDescription></GroupDescription>
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  • The Ubuntu operating system must enforce password complexity by requiring that at least one upper-case character be used.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...
    Rule Low Severity
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Node 2

siemur/test-space

The content of the drawer really is up to you. It could have form fields, definition lists, text lists, labels, charts, progress bars, etc. Spacing recommendation is 24px margins. You can put tabs in here, and can also make the drawer scrollable.

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