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Guide to the Secure Configuration of Red Hat Enterprise Linux 9

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Encrypt Partitions

    Red Hat Enterprise Linux 9 natively supports partition encryption through the Linux Unified Key Setup-on-disk-format (LUKS) technology. The easiest way to encrypt a partition is during installation...
    Rule High Severity
    Show

  • Ensure /home Located On Separate Partition

    If user home directories will be stored locally, create a separate partition for <code>/home</code> at installation time (or migrate it later using LVM). If <code>/home</code> will be mounted from ...
    Rule Low Severity
    Show

  • Ensure /srv Located On Separate Partition

    If a file server (FTP, TFTP...) is hosted locally, create a separate partition for <code>/srv</code> at installation time (or migrate it later using LVM). If <code>/srv</code> will be mounted from ...
    Rule Unknown Severity
    Show

  • Ensure /tmp Located On Separate Partition

    The /tmp directory is a world-writable directory used for temporary file storage. Ensure it has its own partition or logical volume at installation time, or migrate it using LVM.
    Rule Low Severity
    Show

  • Ensure /var Located On Separate Partition

    The <code>/var</code> directory is used by daemons and other system services to store frequently-changing data. Ensure that <code>/var</code> has its own partition or logical volume at installation...
    Rule Low Severity
    Show

  • 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

  • Ensure /var/log Located On Separate Partition

    System logs are stored in the /var/log directory. Ensure that /var/log has its own partition or logical volume at installation time, or migrate it using LVM.
    Rule Low Severity
    Show

  • Ensure /var/log/audit Located On Separate Partition

    Audit logs are stored in the <code>/var/log/audit</code> directory. Ensure that <code>/var/log/audit</code> has its own partition or logical volume at installation time, or migrate it using LVM. M...
    Rule Low Severity
    Show

  • Ensure /var/tmp Located On Separate Partition

    The /var/tmp directory is a world-writable directory used for temporary file storage. Ensure it has its own partition or logical volume at installation time, or migrate it using LVM.
    Rule Medium Severity
    Show

  • Make sure that the dconf databases are up-to-date with regards to respective keyfiles

    By default, DConf uses a binary database as a data backend. The system-level database is compiled from keyfiles in the /etc/dconf/db/ directory by the <pre>dconf update</pre> command. More specific...
    Rule High Severity
    Show

  • Configure GNOME3 DConf User Profile

    By default, DConf provides a standard user profile. This profile contains a list of DConf configuration databases. The user profile and database always take the highest priority. As such the DConf ...
    Rule High Severity
    Show

  • Configure GNOME Login Screen

    In the default GNOME desktop, the login is displayed after system boot and can display user accounts, allow users to reboot the system, and allow users to login automatically and/or with a guest ac...
    Group
    Show

  • Disable the GNOME3 Login Restart and Shutdown Buttons

    In the default graphical environment, users logging directly into the system are greeted with a login screen that allows any user, known or unknown, the ability the ability to shutdown or restart t...
    Rule High Severity
    Show

  • Enable the GNOME3 Login Smartcard Authentication

    In the default graphical environment, smart card authentication can be enabled on the login screen by setting <code>enable-smartcard-authentication</code> to <code>true</code>. <br> ...
    Rule Medium Severity
    Show

  • Enable the GNOME3 Screen Locking On Smartcard Removal

    In the default graphical environment, screen locking on smartcard removal can be enabled by setting <code>removal-action</code> to <code>'lock-screen'</code>. <br> <br> To enable,...
    Rule Medium Severity
    Show

  • Disable GDM Automatic Login

    The GNOME Display Manager (GDM) can allow users to automatically login without user interaction or credentials. User should always be required to authenticate themselves to the system that they are...
    Rule High Severity
    Show

  • Disable XDMCP in GDM

    XDMCP is an unencrypted protocol, and therefore, presents a security risk, see e.g. <a href="https://help.gnome.org/admin/gdm/stable/security.html.en_GB#xdmcpsecurity">XDMCP Gnome docs</a>. To dis...
    Rule High Severity
    Show

  • GNOME Media Settings

    GNOME media settings that apply to the graphical interface.
    Group
    Show

  • Disable GNOME3 Automounting

    The system's default desktop environment, GNOME3, will mount devices and removable media (such as DVDs, CDs and USB flash drives) whenever they are inserted into the system. To disable automount wi...
    Rule Medium Severity
    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

  • 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 inserted into the system. To disable automount-op...
    Rule Medium Severity
    Show

  • 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 inserted into the system. To disable autorun-neve...
    Rule Low Severity
    Show

  • Disable All GNOME3 Thumbnailers

    The system's default desktop environment, GNOME3, uses a number of different thumbnailer programs to generate thumbnails for any new or modified content in an opened folder. To disable the executio...
    Rule Unknown Severity
    Show

  • GNOME Network Settings

    GNOME network settings that apply to the graphical interface.
    Group
    Show

  • Disable WIFI Network Connection Creation in GNOME3

    <code>GNOME</code> allows users to create ad-hoc wireless connections through the <code>NetworkManager</code> applet. Wireless connections should be disabled by adding or setting <code>disable-wifi...
    Rule Medium Severity
    Show

  • Disable WIFI Network Notification in GNOME3

    By default, <code>GNOME</code> disables WIFI notification. This should be permanently set so that users do not connect to a wireless network when the system finds one. While useful for mobile devic...
    Rule Medium Severity
    Show

  • GNOME Remote Access Settings

    GNOME remote access settings that apply to the graphical interface.
    Group
    Show

  • Require Credential Prompting for Remote Access in GNOME3

    By default, <code>GNOME</code> does not require credentials when using <code>Vino</code> for remote access. To configure the system to require remote credentials, add or set <code>authentication-me...
    Rule Medium Severity
    Show

  • Account Lockouts Must Persist

    By setting a `dir` in the faillock configuration account lockouts will persist across reboots.
    Rule Medium Severity
    Show

  • Require Encryption for Remote Access in GNOME3

    By default, <code>GNOME</code> requires encryption when using <code>Vino</code> for remote access. To prevent remote access encryption from being disabled, add or set <code>require-encryption</code...
    Rule Medium Severity
    Show

  • Screensaver Inactivity timeout

    Choose allowed duration (in seconds) of inactive graphical sessions
    Value
    Show

  • Screensaver Lock Delay

    Choose allowed duration (in seconds) after a screensaver becomes active before displaying an authentication prompt
    Value
    Show

  • Ensure Users Cannot Change GNOME3 Screensaver Idle Activation

    If not already configured, ensure that users cannot change GNOME3 screensaver lock settings by adding <pre>/org/gnome/desktop/screensaver/idle-activation-enabled</pre> to <code>/etc/dconf/db/local....
    Rule Medium Severity
    Show

  • 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 configuration file(s) in the <code>/etc/dconf/db/...
    Rule Medium Severity
    Show

  • 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 <code>uint32 <xccdf-1.2:sub idref="xccdf_org.ssgproje...
    Rule Medium Severity
    Show

  • Ensure Only Users Logged In To Real tty Can Execute Sudo - sudo requiretty

    The sudo <code>requiretty</code> tag, when specified, will only execute sudo commands from users logged in to a real tty. This should be enabled by making sure that the <code>requiretty</code> tag ...
    Rule Medium Severity
    Show

  • 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 <code>/etc/dconf/db/local.d/00-security-settings</co...
    Rule Medium Severity
    Show

  • 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-enabled</pre> to <code>/etc/dconf/db/local.d/locks/00-...
    Rule Medium Severity
    Show

  • 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/dconf/db/local.d/00-security-settings</code>. For...
    Rule Medium Severity
    Show

  • Disable Full User Name on Splash Shield

    By default when the screen is locked, the splash shield will show the user's full name. This should be disabled to prevent casual observers from seeing who has access to the system. This can be dis...
    Rule Medium Severity
    Show

  • 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-delay</code> to <code>/etc/dconf/db/local.d/locks/00-...
    Rule Medium Severity
    Show

  • 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> to <code>/etc/dconf/db/local.d/locks/00-security...
    Rule Medium Severity
    Show

  • GNOME System Settings

    GNOME provides configuration and functionality to a graphical desktop environment that changes grahical configurations or allow a user to perform actions that users normally would not be able to do...
    Group
    Show

  • Disable Geolocation in GNOME3

    <code>GNOME</code> allows the clock and applications to track and access location information. This setting should be disabled as applications should not track system location. To configure the sys...
    Rule Medium Severity
    Show

  • Disable Power Settings in GNOME3

    By default, <code>GNOME</code> enables a power profile designed for mobile devices with battery usage. While useful for mobile devices, this setting should be disabled for all other systems. To con...
    Rule Medium Severity
    Show

  • Disable User Administration in GNOME3

    By default, <code>GNOME</code> will allow all users to have some administratrion capability. This should be disabled so that non-administrative users are not making configuration changes. To config...
    Rule High Severity
    Show

  • Group name dedicated to the use of sudo

    Specify the name of the group that should own /usr/bin/sudo.
    Value
    Show

  • 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
    Show

  • 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 stamp will never expire. Defining 0 means always pr...
    Value
    Show

  • 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 0022. This guarantess sudo never lowers the umask w...
    Value
    Show

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