Skip to content
ATO Pathways
  Log In

Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must be a vendor-supported release.

    &lt;VulnDiscussion&gt;An operating system release is considered "supported" if the vendor continues to provide security patches for the product. Wi...
    Rule High Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 vendor packaged system security patches and updates must be installed and up to date.

    &lt;VulnDiscussion&gt;Installing software updates is a fundamental mitigation against the exploitation of publicly known vulnerabilities. If the mo...
    Rule Medium Severity
    Show

  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must display the Standard Mandatory DOD Notice and Consent Banner before granting local or remote access to the system via a command line user logon.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...
    Rule Medium Severity
    Show

  • SRG-OS-000191-GPOS-00080

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must implement the Endpoint Security for Linux Threat Prevention tool.

    &lt;VulnDiscussion&gt;Without the use of automated mechanisms to scan for security flaws on a continuous and/or periodic basis, the operating syste...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • The graphical display manager must not be the default target on RHEL 9 unless approved.

    &lt;VulnDiscussion&gt;Unnecessary service packages must not be installed to decrease the attack surface of the system. Graphical display managers h...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must enable the hardware random number generator entropy gatherer service.

    &lt;VulnDiscussion&gt;The most important characteristic of a random number generator is its randomness, namely its ability to deliver random number...
    Rule Low Severity
    Show

  • SRG-OS-000269-GPOS-00103

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 systemd-journald service must be enabled.

    &lt;VulnDiscussion&gt;In the event of a system failure, RHEL 9 must preserve any information necessary to determine cause of failure and any inform...
    Rule Medium Severity
    Show

  • SRG-OS-000324-GPOS-00125

    <GroupDescription></GroupDescription>
    Group
    Show

  • The systemd Ctrl-Alt-Delete burst key sequence in RHEL 9 must be disabled.

    &lt;VulnDiscussion&gt;A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as c...
    Rule High Severity
    Show

  • SRG-OS-000324-GPOS-00125

    <GroupDescription></GroupDescription>
    Group
    Show

  • The x86 Ctrl-Alt-Delete key sequence must be disabled on RHEL 9.

    &lt;VulnDiscussion&gt;A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as c...
    Rule High Severity
    Show

  • SRG-OS-000324-GPOS-00125

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 debug-shell systemd service must be disabled.

    &lt;VulnDiscussion&gt;The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. Whi...
    Rule Medium Severity
    Show

  • SRG-OS-000080-GPOS-00048

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must require a boot loader superuser password.

    &lt;VulnDiscussion&gt;To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-ap...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must disable the ability of systemd to spawn an interactive boot process.

    &lt;VulnDiscussion&gt;Using interactive or recovery boot, the console user could disable auditing, firewalls, or other services, weakening system s...
    Rule Medium Severity
    Show

  • SRG-OS-000080-GPOS-00048

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must require a unique superusers name upon booting into single-user and maintenance modes.

    &lt;VulnDiscussion&gt;Having a nondefault grub superuser username makes password-guessing attacks less effective.&lt;/VulnDiscussion&gt;&lt;FalsePo...
    Rule High Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 /boot/grub2/grub.cfg file must be group-owned by root.

    &lt;VulnDiscussion&gt;The "root" group is a highly privileged group. Furthermore, the group-owner of this file should not have any access privilege...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 /boot/grub2/grub.cfg file must be owned by root.

    &lt;VulnDiscussion&gt;The " /boot/grub2/grub.cfg" file stores sensitive system configuration. Protection of this file is critical for system securi...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must disable virtual system calls.

    &lt;VulnDiscussion&gt;System calls are special routines in the Linux kernel, which userspace applications ask to do privileged tasks. Invoking a sy...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must clear the page allocator to prevent use-after-free attacks.

    &lt;VulnDiscussion&gt;Poisoning writes an arbitrary value to freed pages, so any modification or reference to that page after being freed or before...
    Rule Medium Severity
    Show

  • SRG-OS-000433-GPOS-00192

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must clear SLUB/SLAB objects to prevent use-after-free attacks.

    &lt;VulnDiscussion&gt;Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in memory locations t...
    Rule Medium Severity
    Show

  • SRG-OS-000433-GPOS-00193

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must enable mitigations against processor-based vulnerabilities.

    &lt;VulnDiscussion&gt;Kernel page-table isolation is a kernel feature that mitigates the Meltdown security vulnerability and hardens the kernel aga...
    Rule Low Severity
    Show

  • SRG-OS-000037-GPOS-00015

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must enable auditing of processes that start prior to the audit 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-000132-GPOS-00067

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must restrict access to the kernel message buffer.

    &lt;VulnDiscussion&gt;Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of infor...
    Rule Medium Severity
    Show

  • SRG-OS-000132-GPOS-00067

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must prevent kernel profiling by nonprivileged users.

    &lt;VulnDiscussion&gt;Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of infor...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must prevent the loading of a new kernel for later execution.

    &lt;VulnDiscussion&gt;Changes to any software components can have significant effects on the overall security of the operating system. This require...
    Rule Medium Severity
    Show

  • SRG-OS-000132-GPOS-00067

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must restrict exposed kernel pointer addresses access.

    &lt;VulnDiscussion&gt;Exposing kernel pointers (through procfs or "seq_printf()") exposes kernel writeable structures, which may contain functions ...
    Rule Medium Severity
    Show

  • SRG-OS-000312-GPOS-00123

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must enable kernel parameters to enforce discretionary access control on hardlinks.

    &lt;VulnDiscussion&gt;By enabling the fs.protected_hardlinks kernel parameter, users can no longer create soft or hard links to files they do not o...
    Rule Medium Severity
    Show

Node 2

siemur/test-space

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.

Capacity
Modules