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Guide to the Secure Configuration of SUSE Linux Enterprise 12

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Enable dnf-automatic Timer

    The dnf-automatic timer can be enabled with the following command: 
    $ sudo systemctl enable dnf-automatic.timer
    Rule Medium Severity
    Show

  • Account and Access Control

    In traditional Unix security, if an attacker gains shell access to a certain login account, they can perform any action or access any file to which that account has access. Therefore, making it mor...
    Group
    Show

  • Login Banner Verbiage

    Enter an appropriate login banner for your organization. Please note that new lines must be expressed by the '\n' character and special characters like parentheses and quotation marks must be escap...
    Value
    Show

  • fail_interval

    Interval for counting failed login attempts before account lockout
    Value
    Show

  • Modify the System Login Banner for Remote Connections

    To configure the system login banner edit <code>/etc/issue.net</code>. Replace the default text with a message compliant with the local site policy or a legal disclaimer. The DoD required text is ...
    Rule Medium Severity
    Show

  • Modify the System Message of the Day Banner

    To configure the system message banner edit <code>/etc/motd</code>. Replace the default text with a message compliant with the local site policy or a legal disclaimer. The DoD required text is eit...
    Rule Medium Severity
    Show

  • Verify Group Ownership of System Login Banner

    To properly set the group owner of /etc/issue, run the command: 
    $ sudo chgrp root /etc/issue
    Rule Medium Severity
    Show

  • Verify Group Ownership of System Login Banner for Remote Connections

    To properly set the group owner of /etc/issue.net, run the command: 
    $ sudo chgrp root /etc/issue.net
    Rule Medium Severity
    Show

  • Verify Group Ownership of Message of the Day Banner

    To properly set the group owner of /etc/motd, run the command: 
    $ sudo chgrp root /etc/motd
    Rule Medium Severity
    Show

  • fail_unlock_time

    Seconds before automatic unlocking or permanently locking after excessive failed logins
    Value
    Show

  • Verify ownership of Message of the Day Banner

    To properly set the owner of /etc/motd, run the command: 
    $ sudo chown root /etc/motd
    Rule Medium Severity
    Show

  • Verify permissions on System Login Banner for Remote Connections

    To properly set the permissions of /etc/issue.net, run the command: 
    $ sudo chmod 0644 /etc/issue.net
    Rule Medium Severity
    Show

  • Verify permissions on Message of the Day Banner

    To properly set the permissions of /etc/motd, run the command: 
    $ sudo chmod 0644 /etc/motd
    Rule Medium Severity
    Show

  • Implement a GUI Warning Banner

    In the default graphical environment, users logging directly into the system are greeted with a login screen provided by the GNOME Display Manager (GDM). The warning banner should be displayed in t...
    Group
    Show

  • Enable GNOME3 Login Warning Banner

    In the default graphical environment, displaying a login warning banner in the GNOME Display Manager's login screen can be enabled on the login screen by setting <code>banner-message-enable</code> ...
    Rule Medium Severity
    Show

  • tally2_unlock_time

    Seconds before automatic unlocking or permanently locking after excessive failed logins
    Value
    Show

  • faildelay_delay

    Delay next login attempt after a failed login
    Value
    Show

  • pwhistory_remember

    Prevent password re-use using password history lookup
    Value
    Show

  • Display the Standard Mandatory DoD Notice and Consent Banner until Explicit Acknowledgement

    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 fed...
    Rule Medium Severity
    Show

  • Password Hashing algorithm

    Specify the system default encryption algorithm for encrypting passwords. Defines the value set as ENCRYPT_METHOD in /etc/login.defs.
    Value
    Show

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