Guide to the Secure Configuration of Red Hat Enterprise Linux 10
Rules, Groups, and Values defined within the XCCDF Benchmark
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Disable GNOME3 Automount Opening
The system's default desktop environment, GNOME3, will mount devices and removable media (such as DVDs, CDs and USB flash drives) whenever they are...Rule Medium Severity -
Disable GNOME3 Automount running
The system's default desktop environment, GNOME3, will mount devices and removable media (such as DVDs, CDs and USB flash drives) whenever they are...Rule Low Severity -
Configure GNOME Screen Locking
In the default GNOME3 desktop, the screen can be locked by selecting the user name in the far right corner of the main panel and selecting <b>Lock<...Group -
Screensaver Inactivity timeout
Choose allowed duration (in seconds) of inactive graphical sessionsValue -
Screensaver Lock Delay
Choose allowed duration (in seconds) after a screensaver becomes active before displaying an authentication promptValue -
Enable GNOME3 Screensaver Idle Activation
To activate the screensaver in the GNOME3 desktop after a period of inactivity, add or set <code>idle-activation-enabled</code> to <code>true</code...Rule Medium Severity -
Set GNOME3 Screensaver Inactivity Timeout
The idle time-out value for inactivity in the GNOME3 desktop is configured via the <code>idle-delay</code> setting must be set under an appropriate...Rule Medium Severity -
Set GNOME3 Screensaver Lock Delay After Activation Period
To activate the locking delay of the screensaver in the GNOME3 desktop when the screensaver is activated, add or set <code>lock-delay</code> to <co...Rule Medium Severity -
Enable GNOME3 Screensaver Lock After Idle Period
To activate locking of the screensaver in the GNOME3 desktop when it is activated, add or set <code>lock-enabled</code> to <code>true</code> in <c...Rule Medium Severity -
Ensure Users Cannot Change GNOME3 Screensaver Lock After Idle Period
If not already configured, ensure that users cannot change GNOME3 screensaver lock settings by adding <pre>/org/gnome/desktop/screensaver/lock-enab...Rule Medium Severity -
Implement Blank Screensaver
To set the screensaver mode in the GNOME3 desktop to a blank screen, add or set <code>picture-uri</code> to <code>string ''</code> in <code>/etc...Rule Medium Severity -
Ensure Users Cannot Change GNOME3 Screensaver Settings
If not already configured, ensure that users cannot change GNOME3 screensaver lock settings by adding <code>/org/gnome/desktop/screensaver/lock-del...Rule Medium Severity -
Ensure Users Cannot Change GNOME3 Session Idle Settings
If not already configured, ensure that users cannot change GNOME3 session idle settings by adding <code>/org/gnome/desktop/session/idle-delay</code...Rule Medium Severity -
GNOME System Settings
GNOME provides configuration and functionality to a graphical desktop environment that changes grahical configurations or allow a user to perform a...Group -
Disable Ctrl-Alt-Del Reboot Key Sequence in GNOME3
By default, <code>GNOME</code> will reboot the system if the <code>Ctrl-Alt-Del</code> key sequence is pressed. <br> <br> To conf...Rule High Severity -
Sudo
<code>Sudo</code>, which stands for "su 'do'", provides the ability to delegate authority to certain users, groups of users, or system administrato...Group -
Group name dedicated to the use of sudo
Specify the name of the group that should own /usr/bin/sudo.Value -
Sudo - logfile value
Specify the sudo logfile to use. The default value used here matches the example location from CIS, which uses /var/log/sudo.log.Value -
Sudo - timestamp_timeout value
Defines the number of minutes that can elapse before <code>sudo</code> will ask for a passwd again. If set to a value less than 0 the user's time s...Value -
Sudo - umask value
Specify the sudo umask to use. The actual umask value that is used is the union of the user's umask and the sudo umask. The default sudo umask is 0...Value -
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> unde...Rule Low Severity -
Ensure Users Re-Authenticate for Privilege Escalation - sudo NOPASSWD
The sudo <code>NOPASSWD</code> tag, when specified, allows a user to execute commands using sudo without having to authenticate. This should be dis...Rule Medium Severity -
Ensure Users Re-Authenticate for Privilege Escalation - sudo
The sudo <code>NOPASSWD</code> and <code>!authenticate</code> option, when specified, allows a user to execute commands using sudo without having t...Rule Medium Severity -
Require Re-Authentication When Using the sudo Command
The sudo <code>timestamp_timeout</code> tag sets the amount of time sudo password prompt waits. The default <code>timestamp_timeout</code> value is...Rule Medium Severity -
The operating system must restrict privilege elevation to authorized personnel
The sudo command allows a user to execute programs with elevated (administrator) privileges. It prompts the user for their password and confirms yo...Rule Medium Severity -
Explicit arguments in sudo specifications
All commands in the sudoers file must strictly specify the arguments allowed to be used for a given user. If the command is supposed to be executed...Rule Medium Severity -
Don't define allowed commands in sudoers by means of exclusion
Policies applied by sudo through the sudoers file should not involve negation. Each user specification in the <code>sudoers</code> file contains a...Rule Medium Severity -
Don't target root user in the sudoers file
The targeted users of a user specification should be, as much as possible, non privileged users (i.e.: non-root). User specifications have to expl...Rule Medium Severity -
Ensure invoking users password for privilege escalation when using sudo
The sudoers security policy requires that users authenticate themselves before they can use sudo. When sudoers requires authentication, it validate...Rule Medium Severity -
Install cryptsetup Package
Thecryptsetup
package can be installed with the following command:$ sudo dnf install cryptsetup
Rule Medium Severity -
Ensure gnutls-utils is installed
Thegnutls-utils
package can be installed with the following command:$ sudo dnf install gnutls-utils
Rule Medium Severity -
Install libdnf-plugin-subscription-manager Package
The <code>libdnf-plugin-subscription-manager</code> package can be installed with the following command: <pre> $ sudo dnf install libdnf-plugin-sub...Rule Medium Severity -
Ensure nss-tools is installed
Thenss-tools
package can be installed with the following command:$ sudo dnf install nss-tools
Rule Medium Severity -
Install subscription-manager Package
The <code>subscription-manager</code> package can be installed with the following command: <pre> $ sudo dnf install subscription-manager</pre> ...Rule Medium Severity -
Uninstall gssproxy Package
Thegssproxy
package can be removed with the following command:$ sudo dnf remove gssproxy
Rule Medium Severity -
Uninstall iprutils Package
Theiprutils
package can be removed with the following command:$ sudo dnf remove iprutils
Rule Medium Severity -
Uninstall tuned Package
Thetuned
package can be removed with the following command:$ sudo dnf remove tuned
Rule Medium Severity -
Updating Software
The <code>dnf</code> command line tool is used to install and update software packages. The system also provides a graphical software update tool i...Group -
Install dnf-automatic Package
Thednf-automatic
package can be installed with the following command:$ sudo dnf install dnf-automatic
Rule Medium Severity -
Ensure dnf Removes Previous Package Versions
<code>dnf</code> should be configured to remove previous software components after new versions have been installed. To configure <code>dnf</code> ...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...Rule Medium Severity -
Ensure gpgcheck Enabled In Main dnf Configuration
The <code>gpgcheck</code> option controls whether RPM packages' signatures are always checked prior to installation. To configure dnf to check pack...Rule High Severity -
Ensure gpgcheck Enabled for Local Packages
<code>dnf</code> should be configured to verify the signature(s) of local packages prior to installation. To configure <code>dnf</code> to verify s...Rule High Severity -
Ensure gpgcheck Enabled for All dnf Package Repositories
To ensure signature checking is not disabled for any repos, remove any lines from files in <code>/etc/yum.repos.d</code> of the form: <pre>gpgcheck...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 w...Rule High Severity -
Ensure Red Hat GPG Key Installed
To ensure the system can cryptographically verify base software packages come from Red Hat (and to connect to the Red Hat Network to receive them),...Rule High Severity -
Enable dnf-automatic Timer
Thednf-automatic
timer can be enabled with the following command:$ sudo systemctl enable dnf-automatic.timer
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...Group -
Authselect profile
Specify the authselect profile to selectValue -
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 ...Group
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