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Microsoft Windows Server 2019 Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000480-GPOS-00227

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  • The password for the krbtgt account on a domain must be reset at least every 180 days.

    &lt;VulnDiscussion&gt;The krbtgt account acts as a service account for the Kerberos Key Distribution Center (KDC) service. The account and passwor...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must limit the caching of logon credentials to four or less on domain-joined member servers.

    &lt;VulnDiscussion&gt;The default Windows configuration caches the last logon credentials for users who log on interactively to a system. This feat...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must be running Credential Guard on domain-joined member servers.

    &lt;VulnDiscussion&gt;Credential Guard uses virtualization-based security to protect data that could be used in credential theft attacks if comprom...
    Rule High Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must prevent local accounts with blank passwords from being used from the network.

    &lt;VulnDiscussion&gt;An account without a password can allow unauthorized access to a system as only the username would be required. Password poli...
    Rule High Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 built-in administrator account must be renamed.

    &lt;VulnDiscussion&gt;The built-in administrator account is a well-known account subject to attack. Renaming this account to an unidentified name i...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 built-in guest account must be renamed.

    &lt;VulnDiscussion&gt;The built-in guest account is a well-known user account on all Windows systems and, as initially installed, does not require ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 maximum age for machine account passwords must be configured to 30 days or less.

    &lt;VulnDiscussion&gt;Computer account passwords are changed automatically on a regular basis. This setting controls the maximum password age that ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 Smart Card removal option must be configured to Force Logoff or Lock Workstation.

    &lt;VulnDiscussion&gt;Unattended systems are susceptible to unauthorized use and must be locked. Configuring a system to lock when a smart card is ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must not allow anonymous SID/Name translation.

    &lt;VulnDiscussion&gt;Allowing anonymous SID/Name translation can provide sensitive information for accessing a system. Only authorized users must ...
    Rule High Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must not allow anonymous enumeration of Security Account Manager (SAM) accounts.

    &lt;VulnDiscussion&gt;Anonymous enumeration of SAM accounts allows anonymous logon users (null session connections) to list all accounts names, thu...
    Rule High Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must be configured to prevent anonymous users from having the same permissions as the Everyone group.

    &lt;VulnDiscussion&gt;Access by anonymous users must be restricted. If this setting is enabled, anonymous users have the same rights and permission...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 services using Local System that use Negotiate when reverting to NTLM authentication must use the computer identity instead of authenticating anonymously.

    &lt;VulnDiscussion&gt;Services using Local System that use Negotiate when reverting to NTLM authentication may gain unauthorized access if allowed ...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must prevent NTLM from falling back to a Null session.

    &lt;VulnDiscussion&gt;NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access.&lt;/VulnDiscussi...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must prevent PKU2U authentication using online identities.

    &lt;VulnDiscussion&gt;PKU2U is a peer-to-peer authentication protocol. This setting prevents online identities from authenticating to domain-joined...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 LAN Manager authentication level must be configured to send NTLMv2 response only and to refuse LM and NTLM.

    &lt;VulnDiscussion&gt;The Kerberos v5 authentication protocol is the default for authentication of users who are logging on to domain accounts. NTL...
    Rule High Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must be configured to at least negotiate signing for LDAP client signing.

    &lt;VulnDiscussion&gt;This setting controls the signing requirements for LDAP clients. This must be set to "Negotiate signing" or "Require signing"...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 session security for NTLM SSP-based clients must be configured to require NTLMv2 session security and 128-bit encryption.

    &lt;VulnDiscussion&gt;Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of t...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 session security for NTLM SSP-based servers must be configured to require NTLMv2 session security and 128-bit encryption.

    &lt;VulnDiscussion&gt;Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of t...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 default permissions of global system objects must be strengthened.

    &lt;VulnDiscussion&gt;Windows systems maintain a global list of shared system resources such as DOS device names, mutexes, and semaphores. Each typ...
    Rule Low Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must preserve zone information when saving attachments.

    &lt;VulnDiscussion&gt;Attachments from outside sources may contain malicious code. Preserving zone of origin (Internet, intranet, local, restricted...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00229

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  • Windows Server 2019 must disable automatically signing in the last interactive user after a system-initiated restart.

    &lt;VulnDiscussion&gt;Windows can be configured to automatically sign the user back in after a Windows Update restart. Some protections are in plac...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • Windows Server 2019 must have a host-based firewall installed and enabled.

    &lt;VulnDiscussion&gt;A firewall provides a line of defense against attack, allowing or blocking inbound and outbound connections based on a set of...
    Rule Medium Severity
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  • SRG-OS-000095-GPOS-00049

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  • The Windows Explorer Preview pane must be disabled for Windows Server 2019.

    &lt;VulnDiscussion&gt;A known vulnerability in Windows could allow the execution of malicious code by either opening a compromised document or view...
    Rule Medium Severity
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  • SRG-OS-000041-GPOS-00019

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  • Windows Server 2019 must have PowerShell Transcription enabled.

    &lt;VulnDiscussion&gt;Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, ...
    Rule Medium Severity
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Node 2

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