Guide to the Secure Configuration of Red Hat Enterprise Linux 8
Rules, Groups, and Values defined within the XCCDF Benchmark
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Install vim Package
Thevim-enhanced
package can be installed with the following command:$ sudo yum install vim-enhanced
Rule Low Severity -
Uninstall abrt-addon-ccpp Package
Theabrt-addon-ccpp
package can be removed with the following command:$ sudo yum erase abrt-addon-ccpp
Rule Low Severity -
pwhistory_remember
Prevent password re-use using password history lookupValue -
Uninstall abrt-cli Package
Theabrt-cli
package can be removed with the following command:$ sudo yum erase abrt-cli
Rule Low Severity -
Uninstall abrt-plugin-logger Package
Theabrt-plugin-logger
package can be removed with the following command:$ sudo yum erase abrt-plugin-logger
Rule Low Severity -
Uninstall abrt-plugin-rhtsupport Package
Theabrt-plugin-rhtsupport
package can be removed with the following command:$ sudo yum erase abrt-plugin-rhtsupport
Rule Low Severity -
Uninstall abrt-plugin-sosreport Package
Theabrt-plugin-sosreport
package can be removed with the following command:$ sudo yum erase abrt-plugin-sosreport
Rule Low Severity -
Uninstall geolite2-city Package
Thegeolite2-city
package can be removed with the following command:$ sudo yum erase geolite2-city
Rule Low Severity -
Uninstall geolite2-country Package
Thegeolite2-country
package can be removed with the following command:$ sudo yum erase geolite2-country
Rule Low Severity -
Uninstall gssproxy Package
Thegssproxy
package can be removed with the following command:$ sudo yum erase gssproxy
Rule Medium Severity -
Uninstall iprutils Package
Theiprutils
package can be removed with the following command:$ sudo yum erase iprutils
Rule Medium Severity -
Uninstall libreport-plugin-logger Package
Thelibreport-plugin-logger
package can be removed with the following command:$ sudo yum erase libreport-plugin-logger
Rule Low Severity -
Uninstall libreport-plugin-rhtsupport Package
Thelibreport-plugin-rhtsupport
package can be removed with the following command:$ sudo yum erase libreport-plugin-rhtsupport
Rule Low Severity -
Uninstall pigz Package
Thepigz
package can be removed with the following command:$ sudo yum erase pigz
Rule Low Severity -
Uninstall python3-abrt-addon Package
Thepython3-abrt-addon
package can be removed with the following command:$ sudo yum erase python3-abrt-addon
Rule Low Severity -
Uninstall tuned Package
Thetuned
package can be removed with the following command:$ sudo yum erase tuned
Rule Medium Severity -
Updating Software
The <code>yum</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>Administration...Group -
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 -
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 -
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 -
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 -
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 -
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 -
Verify ownership of System Login Banner
To properly set the owner of/etc/issue
, run the command:$ sudo chown root /etc/issue
Rule Medium Severity -
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 -
Authselect profile
Specify the authselect profile to selectValue -
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 -
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 -
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 -
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 -
Verify ownership of System Login Banner for Remote Connections
To properly set the owner of/etc/issue.net
, run the command:$ sudo chown root /etc/issue.net
Rule Medium Severity -
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 -
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 -
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 -
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 -
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 -
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 -
tally2
Number of failed login attemptsValue -
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 -
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 -
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 -
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 -
Protect Accounts by Configuring PAM
PAM, or Pluggable Authentication Modules, is a system which implements modular authentication for Linux programs. PAM provides a flexible and configurable architecture for authentication, and it sh...Group -
Password Hashing algorithm
Specify the system default encryption algorithm for encrypting passwords. Defines the value set as ENCRYPT_METHOD in /etc/login.defs.Value -
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 -
Install pam_pwquality Package
Thelibpwquality
package can be installed with the following command:$ sudo yum install libpwquality
Rule Medium Severity -
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 -
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 -
An SELinux Context must be configured for the pam_faillock.so records directory
Thedir
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 -
Account Lockouts Must Be Logged
PAM faillock locks an account due to excessive password failures, this event must be logged.Rule Medium Severity
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