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Nutanix AOS 5.20.x OS Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000027-GPOS-00008

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must limit the number of concurrent sessions to ten for all accounts and/or account types.

    &lt;VulnDiscussion&gt;Operating system management includes the ability to control the number of users and user sessions that utilize an operating s...
    Rule Medium Severity
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  • SRG-OS-000029-GPOS-00010

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must disconnect a session after 15 minutes of idle time for all connection types.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
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  • SRG-OS-000279-GPOS-00109

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must automatically terminate a user session after inactivity time-outs have expired or at shutdown.

    &lt;VulnDiscussion&gt;Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of ...
    Rule Medium Severity
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  • SRG-OS-000032-GPOS-00013

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must monitor remote access methods.

    &lt;VulnDiscussion&gt;Remote access services, such as those providing remote access to network devices and information systems, which lack automate...
    Rule Medium Severity
    Show

  • SRG-OS-000297-GPOS-00115

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must control remote access methods.

    &lt;VulnDiscussion&gt;Remote access services, such as those providing remote access to network devices and information systems, which lack automate...
    Rule Medium Severity
    Show

  • SRG-OS-000033-GPOS-00014

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must implement DoD-approved encryption 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
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  • SRG-OS-000002-GPOS-00002

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must automatically remove or disable temporary user accounts after 72 hours.

    &lt;VulnDiscussion&gt;If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain...
    Rule Low Severity
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  • SRG-OS-000004-GPOS-00004

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must audit all account actions.

    &lt;VulnDiscussion&gt;Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing ...
    Rule Medium Severity
    Show

  • SRG-OS-000080-GPOS-00048

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must be configured with an encrypted boot password for root.

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

  • SRG-OS-000312-GPOS-00122

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must enable an application firewall, if available.

    &lt;VulnDiscussion&gt;Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls ...
    Rule Medium Severity
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  • Nutanix AOS must enforce discretionary access control on symlinks and hardlinks.

    &lt;VulnDiscussion&gt;Discretionary Access Control (DAC) is based on the notion that individual users are "owners" of objects and therefore have di...
    Rule Medium Severity
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  • SRG-OS-000327-GPOS-00127

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must audit the execution of privileged functions.

    &lt;VulnDiscussion&gt;Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external enti...
    Rule Medium Severity
    Show

  • SRG-OS-000021-GPOS-00005

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period.

    &lt;VulnDiscussion&gt;By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...
    Rule Medium Severity
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  • SRG-OS-000023-GPOS-00006

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must be configured to display the Standard Mandatory DoD Notice and Consent Banner before granting access.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...
    Rule Low Severity
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  • SRG-OS-000228-GPOS-00088

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must provide audit record generation capability for DoD-defined auditable events for system module management actions.

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Medium Severity
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  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
    Group
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  • Any publicly accessible connection to Nutanix AOS 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 publicly accessible operating system en...
    Rule Medium Severity
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  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
    Group
    Show

  • Nutanix AOS must provide audit record generation capability for DoD-defined auditable events for successful and unsuccessful attempts to access, modify, or delete privileges, security objects, security levels, or categories of information (e.g., classification levels).

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Medium Severity
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  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must provide audit record generation capability for DoD-defined auditable events for system and account management actions.

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Medium Severity
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  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must provide audit record generation capability for DoD-defined auditable events for file attribute management actions.

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Medium Severity
    Show

  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
    Group
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  • SRG-OS-000064-GPOS-00033

    <GroupDescription></GroupDescription>
    Group
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  • SRG-OS-000368-GPOS-00154

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must provide audit record generation capability for DoD-defined auditable events for directory and permissions management actions.

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Medium Severity
    Show

  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
    Group
    Show

  • Nutanix AOS must provide audit record generation capability for DoD-defined auditable events for file management actions.

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Medium Severity
    Show

  • SRG-OS-000062-GPOS-00031

    <GroupDescription></GroupDescription>
    Group
    Show

  • Nutanix AOS must provide audit record generation capability for DoD-defined auditable events for all account creations, modifications, disabling, and terminations.

    &lt;VulnDiscussion&gt;Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...
    Rule Medium Severity
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  • SRG-OS-000063-GPOS-00032

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must allow only the ISSM (or individuals or roles appointed by the ISSM) to select which auditable events are to be audited.

    &lt;VulnDiscussion&gt;Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel ma...
    Rule Medium Severity
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  • SRG-OS-000064-GPOS-00033

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must produce audit records containing the full-text recording of successful and unsuccessful uses and variations of the chown privileged commands.

    &lt;VulnDiscussion&gt;Without generating audit records specific to the security and mission needs of the organization, it would be difficult to est...
    Rule Medium Severity
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  • Nutanix AOS must produce audit records containing the full-text recording of successful and unsuccessful uses and variations of the creat privileged commands.

    &lt;VulnDiscussion&gt;Without generating audit records specific to the security and mission needs of the organization, it would be difficult to est...
    Rule Medium Severity
    Show

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