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II - Mission Support Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000138-GPOS-00069

    <GroupDescription></GroupDescription>
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  • A sticky bit must be set on all RHEL 9 public directories.

    &lt;VulnDiscussion&gt;Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of infor...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • All RHEL 9 local files and directories must have a valid group owner.

    &lt;VulnDiscussion&gt;Files without a valid group owner may be unintentionally inherited if a group is assigned the same Group Identifier (GID) as ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • All RHEL 9 local files and directories must have a valid owner.

    &lt;VulnDiscussion&gt;Unowned files and directories may be unintentionally inherited if a user is assigned the same user identifier "UID" as the UI...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must be configured so that all system device files are correctly labeled to prevent unauthorized modification.

    &lt;VulnDiscussion&gt;If an unauthorized or modified device is allowed to exist on the system, there is the possibility the system may perform unin...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 /etc/crontab file must have mode 0600.

    &lt;VulnDiscussion&gt;Service configuration files enable or disable features of their respective services that if configured incorrectly can lead t...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 /etc/shadow file must have mode 0000 to prevent unauthorized access.

    &lt;VulnDiscussion&gt;The "/etc/shadow" file contains the list of local system accounts and stores password hashes. Protection of this file is crit...
    Rule Medium Severity
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  • SRG-OS-000096-GPOS-00050

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

    &lt;VulnDiscussion&gt;"Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols....
    Rule Medium Severity
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  • SRG-OS-000096-GPOS-00050

    <GroupDescription></GroupDescription>
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  • The firewalld service on RHEL 9 must be active.

    &lt;VulnDiscussion&gt;"Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols....
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • A RHEL 9 firewall must employ a deny-all, allow-by-exception policy for allowing connections to other systems.

    &lt;VulnDiscussion&gt;Failure to restrict network connectivity only to authorized systems permits inbound connections from malicious systems. It al...
    Rule Medium Severity
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  • SRG-OS-000420-GPOS-00186

    <GroupDescription></GroupDescription>
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  • RHEL 9 must protect against or limit the effects of denial-of-service (DoS) attacks by ensuring rate-limiting measures on impacted network interfaces are implemented.

    &lt;VulnDiscussion&gt;DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot ac...
    Rule Medium Severity
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  • SRG-OS-000096-GPOS-00050

    <GroupDescription></GroupDescription>
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  • RHEL 9 must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the Ports, Protocols, and Services Management (PPSM) Category Assignments List (CAL) and vulnerability assessments.

    &lt;VulnDiscussion&gt;To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embeddi...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 network interfaces must not be in promiscuous mode.

    &lt;VulnDiscussion&gt;Network interfaces in promiscuous mode allow for the capture of all network traffic visible to the system. If unauthorized in...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must enable hardening for the Berkeley Packet Filter just-in-time compiler.

    &lt;VulnDiscussion&gt;When hardened, the extended Berkeley Packet Filter (BPF) just-in-time (JIT) compiler will randomize any kernel addresses in t...
    Rule Medium Severity
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  • SRG-OS-000355-GPOS-00143

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

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
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  • SRG-OS-000355-GPOS-00143

    <GroupDescription></GroupDescription>
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  • RHEL 9 chronyd service must be enabled.

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
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  • SRG-OS-000355-GPOS-00143

    <GroupDescription></GroupDescription>
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  • RHEL 9 must securely compare internal information system clocks at least every 24 hours.

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
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  • SRG-OS-000096-GPOS-00050

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  • RHEL 9 must disable the chrony daemon from acting as a server.

    &lt;VulnDiscussion&gt;Minimizing the exposure of the server functionality of the chrony daemon diminishes the attack surface. Satisfies: SRG-OS-00...
    Rule Low Severity
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  • SRG-OS-000096-GPOS-00050

    <GroupDescription></GroupDescription>
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  • RHEL 9 must disable network management of the chrony daemon.

    &lt;VulnDiscussion&gt;Not exposing the management interface of the chrony daemon on the network diminishes the attack space. Satisfies: SRG-OS-000...
    Rule Low Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 systems using Domain Name Servers (DNS) resolution must have at least two name servers configured.

    &lt;VulnDiscussion&gt;To provide availability for name resolution services, multiple redundant name servers are mandated. A failure in name resolut...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must configure a DNS processing mode in Network Manager.

    &lt;VulnDiscussion&gt;In order to ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured.&lt;/VulnDiscus...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must not have unauthorized IP tunnels configured.

    &lt;VulnDiscussion&gt;IP tunneling mechanisms can be used to bypass network filtering. If tunneling is required, it must be documented with the inf...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 must be configured to prevent unrestricted mail relaying.

    &lt;VulnDiscussion&gt;If unrestricted mail relaying is permitted, unauthorized senders could use this host as a mail relay for the purpose of sendi...
    Rule Medium Severity
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  • SRG-OS-000046-GPOS-00022

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  • RHEL 9 must forward mail from postmaster to the root account using a postfix alias.

    &lt;VulnDiscussion&gt;It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required....
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
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  • RHEL 9 libreswan package must be installed.

    &lt;VulnDiscussion&gt;Providing the ability for remote users or systems to initiate a secure VPN connection protects information when it is transmi...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • There must be no shosts.equiv files on RHEL 9.

    &lt;VulnDiscussion&gt;The shosts.equiv files are used to configure host-based authentication for the system via SSH. Host-based authentication is n...
    Rule High Severity
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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.

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