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Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000031-GPOS-00012

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must conceal, via the session lock, information previously visible on the display with a publicly viewable image.

    &lt;VulnDiscussion&gt;Setting the screensaver mode to blank-only conceals the contents of the display from passersby.&lt;/VulnDiscussion&gt;&lt;Fal...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 effective dconf policy must match the policy keyfiles.

    &lt;VulnDiscussion&gt;Unlike text-based keyfiles, the binary database is impossible to check through most automated and all manual means; therefore...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must disable the ability of a user to restart the system from the login screen.

    &lt;VulnDiscussion&gt;A user who is at the console can reboot the system at the login screen. If restart or shutdown buttons are pressed at the log...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must prevent a user from overriding the disable-restart-buttons setting for the graphical user interface.

    &lt;VulnDiscussion&gt;A user who is at the console can reboot the system at the login screen. If restart or shutdown buttons are pressed at the log...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must disable the ability of a user to accidentally press Ctrl-Alt-Del and cause a system to shut down or reboot.

    &lt;VulnDiscussion&gt;A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as co...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must prevent a user from overriding the Ctrl-Alt-Del sequence settings for the graphical user interface.

    &lt;VulnDiscussion&gt;A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as co...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must disable the user list at logon for graphical user interfaces.

    &lt;VulnDiscussion&gt;Leaving the user list enabled is a security risk since it allows anyone with physical access to the system to enumerate known...
    Rule Medium Severity
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  • SRG-OS-000114-GPOS-00059

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must be configured to disable USB mass storage.

    &lt;VulnDiscussion&gt;USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity. Satisfies: SRG-OS-00...
    Rule Medium Severity
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  • SRG-OS-000378-GPOS-00163

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must have the USBGuard package installed.

    &lt;VulnDiscussion&gt;The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enfo...
    Rule Medium Severity
    Show

  • SRG-OS-000378-GPOS-00163

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must have the USBGuard package enabled.

    &lt;VulnDiscussion&gt;The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enfo...
    Rule Medium Severity
    Show

  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must enable Linux audit logging for the USBGuard daemon.

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Low Severity
    Show

  • SRG-OS-000378-GPOS-00163

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must block unauthorized peripherals before establishing a connection.

    &lt;VulnDiscussion&gt;The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enfo...
    Rule Medium Severity
    Show

  • SRG-OS-000095-GPOS-00049

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 Bluetooth must be disabled.

    &lt;VulnDiscussion&gt;This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL ...
    Rule Medium Severity
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  • SRG-OS-000299-GPOS-00117

    <GroupDescription></GroupDescription>
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  • RHEL 9 wireless network adapters must be disabled.

    &lt;VulnDiscussion&gt;This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL ...
    Rule Medium Severity
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  • SRG-OS-000076-GPOS-00044

    <GroupDescription></GroupDescription>
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  • RHEL 9 user account passwords for new users or password changes must have a 60-day maximum password lifetime restriction in /etc/login.defs.

    &lt;VulnDiscussion&gt;Any password, no matter how complex, can eventually be cracked; therefore, passwords need to be changed periodically. If the ...
    Rule Medium Severity
    Show

  • SRG-OS-000076-GPOS-00044

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 user account passwords must have a 60-day maximum password lifetime restriction.

    &lt;VulnDiscussion&gt;Any password, no matter how complex, can eventually be cracked; therefore, passwords need to be changed periodically. If RHEL...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • All RHEL 9 local interactive user accounts must be assigned a home directory upon creation.

    &lt;VulnDiscussion&gt;If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files th...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must set the umask value to 077 for all local interactive user accounts.

    &lt;VulnDiscussion&gt;The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or le...
    Rule Medium Severity
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  • SRG-OS-000104-GPOS-00051

    <GroupDescription></GroupDescription>
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  • RHEL 9 duplicate User IDs (UIDs) must not exist for interactive users.

    &lt;VulnDiscussion&gt;To ensure accountability and prevent unauthenticated access, interactive users must be identified and authenticated to preven...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 system accounts must not have an interactive login shell.

    &lt;VulnDiscussion&gt;Ensuring shells are not given to system accounts upon login makes it more difficult for attackers to make use of system accou...
    Rule Medium Severity
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  • SRG-OS-000123-GPOS-00064

    <GroupDescription></GroupDescription>
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  • RHEL 9 must automatically expire temporary accounts within 72 hours.

    &lt;VulnDiscussion&gt;Temporary accounts are privileged or nonprivileged accounts that are established during pressing circumstances, such as new s...
    Rule Medium Severity
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  • SRG-OS-000104-GPOS-00051

    <GroupDescription></GroupDescription>
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  • All RHEL 9 interactive users must have a primary group that exists.

    &lt;VulnDiscussion&gt;If a user is assigned the Group Identifier (GID) of a group that does not exist on the system, and a group with the GID is su...
    Rule Medium Severity
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  • SRG-OS-000118-GPOS-00060

    <GroupDescription></GroupDescription>
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  • RHEL 9 must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.

    &lt;VulnDiscussion&gt;Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potenti...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • Executable search paths within the initialization files of all local interactive RHEL 9 users must only contain paths that resolve to the system default or the users home directory.

    &lt;VulnDiscussion&gt;The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search t...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • All RHEL 9 local interactive users must have a home directory assigned in the /etc/passwd file.

    &lt;VulnDiscussion&gt;If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files th...
    Rule Medium Severity
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The content of the drawer really is up to you. It could have form fields, definition lists, text lists, labels, charts, progress bars, etc. Spacing recommendation is 24px margins. You can put tabs in here, and can also make the drawer scrollable.

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