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Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000095-VMM-000480

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  • The ESXi host must disable ESXi Shell unless needed for diagnostics or troubleshooting.

    &lt;VulnDiscussion&gt;The ESXi Shell is an interactive command line environment available locally from the Direct Console User Interface (DCUI) or ...
    Rule Medium Severity
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  • SRG-OS-000104-VMM-000500

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  • The ESXi host must use Active Directory for local user authentication.

    &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-000104-VMM-000500

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  • ESXi hosts using Host Profiles and/or Auto Deploy must use the vSphere Authentication Proxy to protect passwords when adding themselves to Active Directory.

    &lt;VulnDiscussion&gt;If a host is configured to join an Active Directory domain using Host Profiles and/or Auto Deploy, the Active Directory crede...
    Rule Medium Severity
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  • SRG-OS-000104-VMM-000500

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  • Active Directory ESX Admin group membership must not be used when adding ESXi hosts to Active Directory.

    &lt;VulnDiscussion&gt;When adding ESXi hosts to Active Directory, all user/group accounts assigned to the Active Directory group \"ESX Admins\" wil...
    Rule Medium Severity
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  • SRG-OS-000163-VMM-000700

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  • The ESXi host must set a timeout to automatically disable idle shell sessions after two 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-000163-VMM-000700

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  • The ESXi host must terminate shell services after 10 minutes.

    &lt;VulnDiscussion&gt;When the ESXi Shell or Secure Shell (SSH) services are enabled on a host, they will run indefinitely. To avoid having these s...
    Rule Medium Severity
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  • SRG-OS-000163-VMM-000700

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  • The ESXi host must log out of the console UI after two minutes.

    &lt;VulnDiscussion&gt;When the Direct Console User Interface (DCUI) is enabled and logged in, it should be automatically logged out if left logged ...
    Rule Medium Severity
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  • SRG-OS-000341-VMM-001220

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  • The ESXi host must enable a persistent log location for all locally stored logs.

    &lt;VulnDiscussion&gt;ESXi can be configured to store log files on an in-memory file system. This occurs when the host's "/scratch" directory is li...
    Rule Medium Severity
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  • SRG-OS-000355-VMM-001330

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  • The ESXi host must configure NTP time synchronization.

    &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

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  • The ESXi Image Profile and vSphere Installation Bundle (VIB) acceptance levels 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-000423-VMM-001700

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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-000423-VMM-001700

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  • The ESXi host must protect the confidentiality and integrity of transmitted information by protecting ESXi management traffic.

    &lt;VulnDiscussion&gt;The vSphere management network provides access to the vSphere management interface on each component. Services running on the...
    Rule Medium Severity
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  • SRG-OS-000423-VMM-001700

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  • The ESXi host must protect the confidentiality and integrity of transmitted information by isolating IP-based storage traffic.

    &lt;VulnDiscussion&gt;Virtual machines (VMs) might share virtual switches and VLANs with the IP-based storage configurations. IP-based storage incl...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • Simple Network Management Protocol (SNMP) must be configured properly on the ESXi host.

    &lt;VulnDiscussion&gt;If SNMP is not being used, it must remain disabled. If it is being used, the proper trap destination must be configured. If S...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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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-000480-VMM-002000

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  • The ESXi host must disable Inter-Virtual Machine (VM) Transparent Page Sharing.

    &lt;VulnDiscussion&gt;Published academic papers have demonstrated that by forcing a flush and reload of cache memory, it is possible to measure mem...
    Rule Low Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must configure the firewall to restrict access to services running on the host.

    &lt;VulnDiscussion&gt;Unrestricted access to services running on an ESXi host can expose a host to outside attacks and unauthorized access. Reduce ...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must configure the firewall to block network traffic by default.

    &lt;VulnDiscussion&gt;In addition to service-specific firewall rules, ESXi has a default firewall rule policy to allow or deny incoming and outgoin...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • The ESXi host must enable Bridge Protocol Data Units (BPDU) filter on the host to prevent being locked out of physical switch ports with Portfast and BPDU Guard enabled.

    &lt;VulnDiscussion&gt;BPDU Guard and Portfast are commonly enabled on the physical switch to which the ESXi host is directly connected to reduce th...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • All port groups on standard switches must be configured to reject forged transmits.

    &lt;VulnDiscussion&gt;If the virtual machine (VM) operating system changes the Media Access Control (MAC) address, the operating system can send fr...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • All port groups on standard switches must be configured to reject guest Media Access Control (MAC) address changes.

    &lt;VulnDiscussion&gt;If the virtual machine (VM) operating system changes the MAC address, it can send frames with an impersonated source MAC addr...
    Rule High Severity
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  • SRG-OS-000480-VMM-002000

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  • All port groups on standard switches must be configured to reject guest promiscuous mode requests.

    &lt;VulnDiscussion&gt;When promiscuous mode is enabled for a virtual switch, all virtual machines (VMs) connected to the Portgroup have the potenti...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • Use of the dvFilter network application programming interfaces (APIs) must be restricted.

    &lt;VulnDiscussion&gt;If the organization is not using products that use the dvfilter network API, the host should not be configured to send networ...
    Rule Medium Severity
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  • SRG-OS-000480-VMM-002000

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  • All port groups on standard switches must be configured to a value other than that of the native virtual local area network (VLAN).

    &lt;VulnDiscussion&gt;ESXi does not use the concept of native VLAN. Frames with a VLAN specified in the port group will have a tag, but frames with...
    Rule Medium Severity
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  • 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) 4095 unless Virtual Guest Tagging (VGT) is required.

    &lt;VulnDiscussion&gt;When a port group is set to VLAN 4095, the vSwitch passes all network frames to the attached virtual machines (VMs) without m...
    Rule Medium Severity
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Node 2

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