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Guide to the Secure Configuration of Red Hat Enterprise Linux 8

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Uninstall geolite2-country Package

    The geolite2-country package can be removed with the following command: 
    $ sudo yum erase geolite2-country
    Rule Low Severity
    Show

  • Uninstall gssproxy Package

    The gssproxy package can be removed with the following command: 
    $ sudo yum erase gssproxy
    Rule Medium Severity
    Show

  • Uninstall iprutils Package

    The iprutils package can be removed with the following command: 
    $ sudo yum erase iprutils
    Rule Medium Severity
    Show

  • Uninstall libreport-plugin-logger Package

    The libreport-plugin-logger package can be removed with the following command: 
    $ sudo yum erase libreport-plugin-logger
    Rule Low Severity
    Show

  • Uninstall libreport-plugin-rhtsupport Package

    The libreport-plugin-rhtsupport package can be removed with the following command: 
    $ sudo yum erase libreport-plugin-rhtsupport
    Rule Low Severity
    Show

  • Uninstall pigz Package

    The pigz package can be removed with the following command: 
    $ sudo yum erase pigz
    Rule Low Severity
    Show

  • Uninstall python3-abrt-addon Package

    The python3-abrt-addon package can be removed with the following command: 
    $ sudo yum erase python3-abrt-addon
    Rule Low Severity
    Show

  • Install dnf-automatic Package

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

  • Ensure yum Removes Previous Package Versions

    <code>yum</code> should be configured to remove previous software components after new versions have been installed. To configure <code>yum</code> to remove the previous software components after ...
    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 for Local Packages

    <code>yum</code> should be configured to verify the signature(s) of local packages prior to installation. To configure <code>yum</code> to verify signatures of local packages, set the <code>localpk...
    Rule High Severity
    Show

  • Ensure gpgcheck Enabled for All yum 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 gpgcheck Enabled for Repository Metadata

    Verify the operating system prevents the installation of patches, service packs, device drivers, or operating system components of local packages without verification of the repository metadata. Ch...
    Rule High Severity
    Show

  • Ensure Software Patches Installed

    If the system is joined to the Red Hat Network, a Red Hat Satellite Server, or a yum server, run the following command to install updates: <pre>$ sudo yum update</pre> If the system is not configu...
    Rule Medium Severity
    Show

  • 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

  • Authselect profile

    Specify the authselect profile to select
    Value
    Show

  • Enable authselect

    Configure user authentication setup to use the <code>authselect</code> tool. If authselect profile is selected, the rule will enable the <xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var...
    Rule Medium Severity
    Show

  • Warning Banners for System Accesses

    Each system should expose as little information about itself as possible. <br> <br> System banners, which are typically displayed just before a login prompt, give out information about the s...
    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

  • 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

  • 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

  • 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

    To properly set the permissions of /etc/issue, run the command: 
    $ sudo chmod 0644 /etc/issue
    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

  • Set the GNOME3 Login Warning Banner Text

    In the default graphical environment, configuring the login warning banner text in the GNOME Display Manager's login screen can be configured on the login screen by setting <code>banner-message-tex...
    Rule Medium Severity
    Show

  • PAM pwhistory remember - control flag

    'Specify the control flag required for password remember requirement. If multiple values are allowed write them separated by commas as in "required,requisite", for remediations the first value will...
    Value
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  • tally2

    Number of failed login attempts
    Value
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  • Configure the Use of the pam_faillock.so Module in the /etc/pam.d/password-auth File.

    The pam_faillock.so module must be loaded in preauth in /etc/pam.d/password-auth.
    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
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  • remember

    The last n passwords for each user are saved in <code>/etc/security/opasswd</code> in order to force password change history and keep the user from alternating between the same password too frequen...
    Value
    Show

  • Install pam_pwquality Package

    The libpwquality package can be installed with the following command: 
    $ sudo yum install libpwquality
    Rule Medium Severity
    Show

  • Disallow Configuration to Bypass Password Requirements for Privilege Escalation

    Verify the operating system is not configured to bypass password requirements for privilege escalation. Check the configuration of the "/etc/pam.d/sudo" file with the following command: <pre>$ sudo...
    Rule Medium Severity
    Show

  • Set Up a Private Namespace in PAM Configuration

    To setup a private namespace add the following line to /etc/pam.d/login: 
    session    required     pam_namespace.so
    Rule Low Severity
    Show

  • Set Lockouts for Failed Password Attempts

    The <code>pam_faillock</code> PAM module provides the capability to lock out user accounts after a number of failed login attempts. Its documentation is available in <code>/usr/share/doc/pam-VERSIO...
    Group
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  • fail_deny

    Number of failed login attempts before account lockout
    Value
    Show

  • faillock directory

    The directory where the user files with the failure records are kept
    Value
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  • fail_interval

    Interval for counting failed login attempts before account lockout
    Value
    Show

  • fail_unlock_time

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

  • tally2_unlock_time

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

  • pwhistory_remember

    Prevent password re-use using password history lookup
    Value
    Show

  • Configure the Use of the pam_faillock.so Module in the /etc/pam.d/system-auth File.

    The pam_faillock.so module must be loaded in preauth in /etc/pam.d/system-auth.
    Rule Medium Severity
    Show

  • An SELinux Context must be configured for the pam_faillock.so records directory

    The dir configuration option in PAM pam_faillock.so module defines where the lockout records is stored. The configured directory must have the correct SELinux context.
    Rule Medium Severity
    Show

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