Microsoft Windows Server 2019 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must limit the caching of logon credentials to four or less on domain-joined member servers.
<VulnDiscussion>The default Windows configuration caches the last logon credentials for users who log on interactively to a system. This feat...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must be running Credential Guard on domain-joined member servers.
<VulnDiscussion>Credential Guard uses virtualization-based security to protect data that could be used in credential theft attacks if comprom...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must prevent local accounts with blank passwords from being used from the network.
<VulnDiscussion>An account without a password can allow unauthorized access to a system as only the username would be required. Password poli...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 built-in administrator account must be renamed.
<VulnDiscussion>The built-in administrator account is a well-known account subject to attack. Renaming this account to an unidentified name i...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 built-in guest account must be renamed.
<VulnDiscussion>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 -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must prevent PKU2U authentication using online identities.
<VulnDiscussion>PKU2U is a peer-to-peer authentication protocol. This setting prevents online identities from authenticating to domain-joined...Rule Medium Severity -
Windows Server 2019 maximum age for machine account passwords must be configured to 30 days or less.
<VulnDiscussion>Computer account passwords are changed automatically on a regular basis. This setting controls the maximum password age that ...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Smart Card removal option must be configured to Force Logoff or Lock Workstation.
<VulnDiscussion>Unattended systems are susceptible to unauthorized use and must be locked. Configuring a system to lock when a smart card is ...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must not allow anonymous SID/Name translation.
<VulnDiscussion>Allowing anonymous SID/Name translation can provide sensitive information for accessing a system. Only authorized users must ...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must not allow anonymous enumeration of Security Account Manager (SAM) accounts.
<VulnDiscussion>Anonymous enumeration of SAM accounts allows anonymous logon users (null session connections) to list all accounts names, thu...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must be configured to prevent anonymous users from having the same permissions as the Everyone group.
<VulnDiscussion>Access by anonymous users must be restricted. If this setting is enabled, anonymous users have the same rights and permission...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 services using Local System that use Negotiate when reverting to NTLM authentication must use the computer identity instead of authenticating anonymously.
<VulnDiscussion>Services using Local System that use Negotiate when reverting to NTLM authentication may gain unauthorized access if allowed ...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must prevent NTLM from falling back to a Null session.
<VulnDiscussion>NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access.</VulnDiscussi...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 LAN Manager authentication level must be configured to send NTLMv2 response only and to refuse LM and NTLM.
<VulnDiscussion>The Kerberos v5 authentication protocol is the default for authentication of users who are logging on to domain accounts. NTL...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must be configured to at least negotiate signing for LDAP client signing.
<VulnDiscussion>This setting controls the signing requirements for LDAP clients. This must be set to "Negotiate signing" or "Require signing"...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 session security for NTLM SSP-based clients must be configured to require NTLMv2 session security and 128-bit encryption.
<VulnDiscussion>Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of t...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 session security for NTLM SSP-based servers must be configured to require NTLMv2 session security and 128-bit encryption.
<VulnDiscussion>Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of t...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 default permissions of global system objects must be strengthened.
<VulnDiscussion>Windows systems maintain a global list of shared system resources such as DOS device names, mutexes, and semaphores. Each typ...Rule Low Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must preserve zone information when saving attachments.
<VulnDiscussion>Attachments from outside sources may contain malicious code. Preserving zone of origin (Internet, intranet, local, restricted...Rule Medium Severity -
SRG-OS-000480-GPOS-00229
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must disable automatically signing in the last interactive user after a system-initiated restart.
<VulnDiscussion>Windows can be configured to automatically sign the user back in after a Windows Update restart. Some protections are in plac...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must have a host-based firewall installed and enabled.
<VulnDiscussion>A firewall provides a line of defense against attack, allowing or blocking inbound and outbound connections based on a set of...Rule Medium Severity -
SRG-OS-000041-GPOS-00019
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must have PowerShell Transcription enabled.
<VulnDiscussion>Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, ...Rule Medium Severity
Node 2
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