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VMware vSphere 8.0 ESXi Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000023-VMM-000060

    <GroupDescription></GroupDescription>
    Group
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  • The ESXi host must display the Standard Mandatory DOD Notice and Consent Banner before granting access to the system via the Direct Console User Interface (DCUI).

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the host ensures privacy and security notif...
    Rule Medium Severity
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  • SRG-OS-000027-VMM-000080

    <GroupDescription></GroupDescription>
    Group
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  • The ESXi host must enable lockdown mode.

    &lt;VulnDiscussion&gt;Enabling Lockdown Mode disables direct access to an ESXi host, requiring the host to be managed remotely from vCenter Server....
    Rule Medium Severity
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  • SRG-OS-000029-VMM-000100

    <GroupDescription></GroupDescription>
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  • The ESXi host client must be configured with an idle session timeout.

    &lt;VulnDiscussion&gt;The ESXi host client is the UI served up by the host itself, outside of vCenter. It is accessed at https://&lt;ESX FQDN&gt;/u...
    Rule Medium Severity
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  • SRG-OS-000033-VMM-000140

    <GroupDescription></GroupDescription>
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  • The ESXi host Secure Shell (SSH) daemon must use FIPS 140-2 validated cryptographic modules to protect the confidentiality of remote access sessions.

    &lt;VulnDiscussion&gt;Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote...
    Rule High Severity
    Show

  • SRG-OS-000037-VMM-000150

    <GroupDescription></GroupDescription>
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  • The ESXi must produce audit records containing information to establish what type of events occurred.

    &lt;VulnDiscussion&gt;Without establishing what types of events occurred, it would be difficult to establish, correlate, and investigate the events...
    Rule Medium Severity
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  • SRG-OS-000069-VMM-000360

    <GroupDescription></GroupDescription>
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  • The ESXi host must enforce password complexity by configuring a password quality policy.

    &lt;VulnDiscussion&gt;To enforce the use of complex passwords, minimum numbers of characters of different classes are mandated. The use of complex...
    Rule Medium Severity
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  • SRG-OS-000077-VMM-000440

    <GroupDescription></GroupDescription>
    Group
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  • The ESXi host must prohibit password reuse for a minimum of five generations.

    &lt;VulnDiscussion&gt;If a user or root used the same password continuously or was allowed to change it back shortly after being forced to change i...
    Rule Medium Severity
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  • SRG-OS-000095-VMM-000480

    <GroupDescription></GroupDescription>
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  • The ESXi host must be configured to disable nonessential capabilities by disabling the Managed Object Browser (MOB).

    &lt;VulnDiscussion&gt;The MOB provides a way to explore the object model used by the VMkernel to manage the host and enables configurations to be c...
    Rule Medium Severity
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  • SRG-OS-000104-VMM-000500

    <GroupDescription></GroupDescription>
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  • The ESXi host must uniquely identify and must authenticate organizational users by using Active Directory.

    &lt;VulnDiscussion&gt;Join ESXi hosts to an Active Directory domain to eliminate the need to create and maintain multiple local user accounts. Usin...
    Rule Low Severity
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  • SRG-OS-000107-VMM-000530

    <GroupDescription></GroupDescription>
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  • The ESXi host Secure Shell (SSH) daemon must ignore .rhosts files.

    &lt;VulnDiscussion&gt;SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts. SSH can emulate...
    Rule Medium Severity
    Show

  • SRG-OS-000163-VMM-000700

    <GroupDescription></GroupDescription>
    Group
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  • The ESXi host must set a timeout to automatically end idle shell sessions after fifteen minutes.

    &lt;VulnDiscussion&gt;If a user forgets to log out of their local or remote ESXi Shell session, the idle connection will remain open indefinitely a...
    Rule Medium Severity
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  • SRG-OS-000257-VMM-000910

    <GroupDescription></GroupDescription>
    Group
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  • The ESXi host must implement Secure Boot enforcement.

    &lt;VulnDiscussion&gt;Secure Boot is part of the UEFI firmware standard. With UEFI Secure Boot enabled, a host refuses to load any UEFI driver or a...
    Rule Medium Severity
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  • SRG-OS-000278-VMM-001000

    <GroupDescription></GroupDescription>
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  • The ESXi host must enable Secure Boot.

    &lt;VulnDiscussion&gt;Secure Boot is part of the Unified Extensible Firmware Interface (UEFI) firmware standard. With UEFI Secure Boot enabled, a h...
    Rule Medium Severity
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  • SRG-OS-000329-VMM-001180

    <GroupDescription></GroupDescription>
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  • The ESXi host must enforce an unlock timeout of 15 minutes after a user account is locked out.

    &lt;VulnDiscussion&gt;By enforcing a reasonable unlock timeout after multiple failed logon attempts, the risk of unauthorized access via user passw...
    Rule Medium Severity
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  • SRG-OS-000341-VMM-001220

    <GroupDescription></GroupDescription>
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  • The ESXi host must allocate audit record storage capacity to store at least one week's worth of audit records.

    &lt;VulnDiscussion&gt;In order to ensure ESXi has sufficient storage capacity in which to write the audit logs, audit record storage capacity shoul...
    Rule Medium Severity
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  • SRG-OS-000342-VMM-001230

    <GroupDescription></GroupDescription>
    Group
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  • The ESXi host must off-load logs via syslog.

    &lt;VulnDiscussion&gt;Remote logging to a central log host provides a secure, centralized store for ESXi logs. By gathering host log files onto a c...
    Rule Medium Severity
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  • SRG-OS-000355-VMM-001330

    <GroupDescription></GroupDescription>
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  • The ESXi host must synchronize internal information system clocks to an authoritative time source.

    &lt;VulnDiscussion&gt;To ensure the accuracy of the system clock, it must be synchronized with an authoritative time source within DOD. Many system...
    Rule Medium Severity
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  • SRG-OS-000366-VMM-001430

    <GroupDescription></GroupDescription>
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  • The ESXi Image Profile and vSphere Installation Bundle (VIB) acceptance level must be verified.

    &lt;VulnDiscussion&gt;Verify the ESXi Image Profile to only allow signed VIBs. An unsigned VIB represents untested code installed on an ESXi host. ...
    Rule High Severity
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  • SRG-OS-000379-VMM-001550

    <GroupDescription></GroupDescription>
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  • The ESXi host must enable bidirectional Challenge-Handshake Authentication Protocol (CHAP) authentication for Internet Small Computer Systems Interface (iSCSI) traffic.

    &lt;VulnDiscussion&gt;When enabled, vSphere performs bidirectional authentication of both the iSCSI target and host. When not authenticating both t...
    Rule Medium Severity
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  • SRG-OS-000423-VMM-001700

    <GroupDescription></GroupDescription>
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  • The ESXi host must protect the confidentiality and integrity of transmitted information by isolating vMotion traffic.

    &lt;VulnDiscussion&gt;While encrypted vMotion is available, vMotion traffic should still be sequestered from other traffic to further protect it fr...
    Rule Medium Severity
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  • SRG-OS-000425-VMM-001710

    <GroupDescription></GroupDescription>
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  • The ESXi host must maintain the confidentiality and integrity of information during transmission by exclusively enabling Transport Layer Security (TLS) 1.2.

    &lt;VulnDiscussion&gt;TLS 1.0 and 1.1 are deprecated protocols with well-published shortcomings and vulnerabilities. TLS 1.2 should be enabled on a...
    Rule High Severity
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  • SRG-OS-000478-VMM-001980

    <GroupDescription></GroupDescription>
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  • The ESXi host Secure Shell (SSH) daemon must be configured to only use FIPS 140-2 validated ciphers.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. ESXi must impl...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

    <GroupDescription></GroupDescription>
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  • The ESXi host DCUI.Access list must be verified.

    &lt;VulnDiscussion&gt;Lockdown mode disables direct host access, requiring that administrators manage hosts from vCenter Server. However, if a host...
    Rule Medium Severity
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  • SRG-OS-000023-VMM-000060

    <GroupDescription></GroupDescription>
    Group
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  • The ESXi host must display the Standard Mandatory DOD Notice and Consent Banner before granting access to the system via Secure Shell (SSH).

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

  • SRG-OS-000023-VMM-000060

    <GroupDescription></GroupDescription>
    Group
    Show

  • The ESXi host Secure Shell (SSH) daemon must display the Standard Mandatory DOD Notice and Consent Banner before granting access to the system.

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

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