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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-000075-GPOS-00043

    <GroupDescription></GroupDescription>
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  • Nutanix AOS must prohibit password reuse for a minimum of five generations.

    &lt;VulnDiscussion&gt;Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute...
    Rule Medium Severity
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  • SRG-OS-000383-GPOS-00166

    <GroupDescription></GroupDescription>
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  • Nutanix AOS must prohibit the use of cached authenticators.

    &lt;VulnDiscussion&gt;If cached authentication information is out-of-date, the validity of the authentication information may be questionable.&lt;/...
    Rule Medium Severity
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  • SRG-OS-000120-GPOS-00061

    <GroupDescription></GroupDescription>
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  • Nutanix AOS pam_unix.so module must be configured in the password-auth file to use a FIPS 140-2 approved cryptographic hashing algorithm for system authentication.

    &lt;VulnDiscussion&gt;Unapproved mechanisms used for authentication to the cryptographic module are not verified and therefore, cannot be relied up...
    Rule High Severity
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  • SRG-OS-000392-GPOS-00172

    <GroupDescription></GroupDescription>
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  • Nutanix AOS must audit all activities performed during nonlocal maintenance and diagnostic sessions.

    &lt;VulnDiscussion&gt;If events associated with nonlocal administrative access or diagnostic sessions are not logged, a major tool for assessing an...
    Rule Medium Severity
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  • SRG-OS-000478-GPOS-00223

    <GroupDescription></GroupDescription>
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  • Nutanix AOS must enable FIPS mode to implement NIST FIPS-validated cryptography.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The operating ...
    Rule High Severity
    Show

  • SRG-OS-000134-GPOS-00068

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must implement nonexecutable data to protect its memory from unauthorized code execution.

    &lt;VulnDiscussion&gt;Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in memory locations t...
    Rule Medium Severity
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  • Nutanix AOS must be configured to run SELinux Policies.

    &lt;VulnDiscussion&gt;Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed...
    Rule Medium Severity
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  • SRG-OS-000138-GPOS-00069

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must be configured to restrict 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-000420-GPOS-00186

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must protect against or limit the effects of denial-of-service (DoS) attacks by ensuring the operating system is implementing rate-limiting measures on impacted network interfaces.

    &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
    Show

  • SRG-OS-000142-GPOS-00071

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must be configured to use syncookies to limit denial-of-service (DoS) attacks.

    &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
    Show

  • SRG-OS-000423-GPOS-00187

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must reveal error messages only to authorized users.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
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  • SRG-OS-000433-GPOS-00192

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must protect the confidentiality and integrity of transmitted information.

    &lt;VulnDiscussion&gt;Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected commu...
    Rule Medium Severity
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  • SRG-OS-000425-GPOS-00189

    <GroupDescription></GroupDescription>
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  • Nutanix AOS must maintain the confidentiality and integrity of information during preparation for transmission.

    &lt;VulnDiscussion&gt;Information can be either unintentionally or maliciously disclosed or modified during preparation for transmission, for examp...
    Rule Medium Severity
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  • SRG-OS-000426-GPOS-00190

    <GroupDescription></GroupDescription>
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  • Nutanix AOS must maintain the confidentiality and integrity of information during reception.

    &lt;VulnDiscussion&gt;Information can be either unintentionally or maliciously disclosed or modified during reception, including, for example, duri...
    Rule Medium Severity
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  • SRG-OS-000205-GPOS-00083

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must generate error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries.

    &lt;VulnDiscussion&gt; Any operating system providing too much information in error messages risks compromising the data and security of the struct...
    Rule Medium Severity
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  • SRG-OS-000206-GPOS-00084

    <GroupDescription></GroupDescription>
    Group
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  • SRG-OS-000433-GPOS-00193

    <GroupDescription></GroupDescription>
    Group
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  • Nutanix AOS must implement address space layout randomization to protect its memory from unauthorized code execution.

    &lt;VulnDiscussion&gt;Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in memory locations t...
    Rule Medium Severity
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  • SRG-OS-000437-GPOS-00194

    <GroupDescription></GroupDescription>
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  • Nutanix AOS must remove all software components after updated versions have been installed.

    &lt;VulnDiscussion&gt;Previous versions of software components that are not removed from the information system after updates have been installed m...
    Rule Medium Severity
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  • SRG-OS-000445-GPOS-00199

    <GroupDescription></GroupDescription>
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  • Nutanix AOS must be configured to use SELinux Enforcing mode.

    &lt;VulnDiscussion&gt;Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed...
    Rule Medium Severity
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