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VMware vSphere 7.0 ESXi Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000480-VMM-002000

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  • All port groups on standard switches must not be configured to virtual local area network (VLAN) values reserved by upstream physical switches.

    &lt;VulnDiscussion&gt;Certain physical switches reserve certain VLAN IDs for internal purposes and often disallow traffic configured to these value...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must not provide root/administrator-level access to Common Information Model (CIM)-based hardware monitoring tools or other third-party applications.

    &lt;VulnDiscussion&gt;The CIM system provides an interface that enables hardware-level management from remote applications via a set of standard ap...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must have all security patches and updates installed.

    &lt;VulnDiscussion&gt;Installing software updates is a fundamental mitigation against the exploitation of publicly known vulnerabilities.&lt;/VulnD...
    Rule High Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must exclusively enable Transport Layer Security (TLS) 1.2 for all endpoints.

    &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-000480-VMM-002000

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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-000480-VMM-002000

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  • The ESXi host must use DOD-approved certificates.

    &lt;VulnDiscussion&gt;The default self-signed host certificate issued by the VMware Certificate Authority (VMCA) must be replaced with a DOD-approv...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must not suppress warnings that the local or remote shell sessions are enabled.

    &lt;VulnDiscussion&gt;Warnings that local or remote shell sessions are enabled alert administrators to activity they may not be aware of and need t...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must not suppress warnings about unmitigated hyperthreading vulnerabilities.

    &lt;VulnDiscussion&gt;The L1 Terminal Fault (L1TF) CPU vulnerabilities published in 2018 have patches and mitigations available in vSphere. However...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host Secure Shell (SSH) daemon must disable port forwarding.

    &lt;VulnDiscussion&gt;While enabling Transmission Control Protocol (TCP) tunnels is a valuable function of sshd, this feature is not appropriate fo...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host OpenSLP service must be disabled.

    &lt;VulnDiscussion&gt;OpenSLP implements the Service Location Protocol to help CIM clients discover CIM servers over TCP 427. This service is not w...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

    <GroupDescription></GroupDescription>
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  • The ESXi host must enable audit logging.

    &lt;VulnDiscussion&gt;ESXi offers both local and remote audit recordkeeping to meet the requirements of the NIAP Virtualization Protection Profile ...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must enable strict x509 verification for SSL syslog endpoints.

    &lt;VulnDiscussion&gt;When sending syslog data to a remote host via SSL, the ESXi host is presented with the endpoint's SSL server certificate. In ...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must verify certificates for SSL syslog endpoints.

    &lt;VulnDiscussion&gt;When sending syslog data to a remote host, ESXi can be configured to use any combination of TCP, UDP and SSL transports. When...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must enable volatile key destruction.

    &lt;VulnDiscussion&gt;By default, pages allocated for virtual machines (VMs), userspace applications, and kernel threads are zeroed out at allocati...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must configure a session timeout for the vSphere API.

    &lt;VulnDiscussion&gt;The vSphere API (VIM) allows for remote, programmatic administration of the ESXi host. Authenticated API sessions are no diff...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi Host Client must be configured with a session timeout.

    &lt;VulnDiscussion&gt;The ESXi Host Client is the UI served up by the host itself, outside of vCenter. It is accessed by browsing to "https://&lt;E...
    Rule Medium Severity
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  • SRG-OS-000033-VMM-000140

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  • The ESXi host rhttpproxy daemon must use FIPS 140-2 validated cryptographic modules to protect the confidentiality of remote access sessions.

    &lt;VulnDiscussion&gt;ESXi runs a reverse proxy service called rhttpproxy that front ends internal services and application programming interfaces ...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must be configured with an appropriate maximum password age.

    &lt;VulnDiscussion&gt;The older an ESXi local account password is, the larger the opportunity window is for attackers to guess, crack or reuse a pr...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must not be configured to override virtual machine (VM) configurations.

    &lt;VulnDiscussion&gt;Each VM on an ESXi host runs in its own "vmx" process. Upon creation, a vmx process will look in two locations for configurat...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must not be configured to override virtual machine (VM) logger settings.

    &lt;VulnDiscussion&gt;Each VM on an ESXi host runs in its own "vmx" process. Upon creation, a vmx process will look in two locations for configurat...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must require TPM-based configuration encryption.

    &lt;VulnDiscussion&gt;An ESXi host's configuration consists of configuration files for each service that runs on the host. The configuration files ...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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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-000480-VMM-002000

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  • The ESXi Common Information Model (CIM) service must be disabled.

    &lt;VulnDiscussion&gt;The CIM system provides an interface that enables hardware-level management from remote applications via a set of standard ap...
    Rule Medium Severity
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  • SRG-OS-000478-VMM-001980

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  • The ESXi host 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 using encryption to protect data. ESXi must implemen...
    Rule Medium Severity
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