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Guide to the Secure Configuration of SUSE Linux Enterprise 15

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Ensure gnutls-utils is installed

    The gnutls-utils package can be installed with the following command: 
    $ sudo zypper install gnutls-utils
    Rule Medium Severity
    Show

  • Ensure nss-tools is installed

    The nss-tools package can be installed with the following command: 
    $ sudo zypper install nss-tools
    Rule Medium Severity
    Show

  • Updating Software

    The <code>zypper</code> command line tool is used to install and update software packages. The system also provides a graphical software update tool in the <b>System</b> menu, in the <b>Administrat...
    Group
    Show

  • Install dnf-automatic Package

    The dnf-automatic package can be installed with the following command: 
    $ sudo zypper install dnf-automatic
    Rule Medium Severity
    Show

  • Ensure zypper Removes Previous Package Versions

    <code>zypper</code> should be configured to remove previous software components after new versions have been installed. To configure <code>zypper</code> to remove the previous software components ...
    Rule Low Severity
    Show

  • Configure dnf-automatic to Install Available Updates Automatically

    To ensure that the packages comprising the available updates will be automatically installed by <code>dnf-automatic</code>, set <code>apply_updates</code> to <code>yes</code> under <code>[commands]...
    Rule Medium Severity
    Show

  • Configure dnf-automatic to Install Only Security Updates

    To configure <code>dnf-automatic</code> to install only security updates automatically, set <code>upgrade_type</code> to <code>security</code> under <code>[commands]</code> section in <code>/etc/dn...
    Rule Low Severity
    Show

  • Ensure gpgcheck Enabled In Main zypper Configuration

    The <code>gpgcheck</code> option controls whether RPM packages' signatures are always checked prior to installation. To configure zypper to check package signatures before installing them, ensure t...
    Rule High Severity
    Show

  • Ensure gpgcheck Enabled for All zypper Package Repositories

    To ensure signature checking is not disabled for any repos, remove any lines from files in /etc/yum.repos.d of the form: 
    gpgcheck=0
    Rule High Severity
    Show

  • Ensure package manager repositories are configured

    Systems need to have package manager repositories configured to ensure they receive the latest patches and updates.
    Rule Medium Severity
    Show

  • Ensure SUSE GPG Key Installed

    To ensure the system can cryptographically verify base software packages come from SUSE (and to connect to the SUSE to receive them), the SUSE GPG key must properly be installed. To install the SUS...
    Rule High Severity
    Show

  • Ensure Software Patches Installed

    If the system is configured for online updates, invoking the following command will list available security updates: <pre>$ sudo zypper refresh &amp;&amp; sudo zypper list-patches -g security</pre...
    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

  • Authselect profile

    Specify the authselect profile to select
    Value
    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

  • MotD 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

  • Remote 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

  • 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

  • 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

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