Microsoft Windows Server 2019 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-OS-000096-GPOS-00050
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must not have the Telnet Client installed.
<VulnDiscussion>Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authe...Rule Medium Severity -
SRG-OS-000104-GPOS-00051
<GroupDescription></GroupDescription>Group -
Windows Server 2019 shared user accounts must not be permitted.
<VulnDiscussion>Shared accounts (accounts where two or more people log on with the same user identification) do not provide adequate identifi...Rule Medium Severity -
SRG-OS-000104-GPOS-00051
<GroupDescription></GroupDescription>Group -
Windows Server 2019 accounts must require passwords.
<VulnDiscussion>The lack of password protection enables anyone to gain access to the information system, which opens a backdoor opportunity f...Rule Medium Severity -
SRG-OS-000105-GPOS-00052
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Active Directory user accounts, including administrators, must be configured to require the use of a Common Access Card (CAC), Personal Identity Verification (PIV)-compliant hardware token, or Alternate Logon Token (ALT) for user authentication.
<VulnDiscussion>Smart cards such as the CAC support a two-factor authentication technique. This provides a higher level of trust in the asser...Rule Medium Severity -
SRG-OS-000112-GPOS-00057
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Kerberos user logon restrictions must be enforced.
<VulnDiscussion>This policy setting determines whether the Kerberos Key Distribution Center (KDC) validates every request for a session ticke...Rule Medium Severity -
SRG-OS-000112-GPOS-00057
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Kerberos service ticket maximum lifetime must be limited to 600 minutes or less.
<VulnDiscussion>This setting determines the maximum amount of time (in minutes) that a granted session ticket can be used to access a particu...Rule Medium Severity -
SRG-OS-000112-GPOS-00057
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Kerberos user ticket lifetime must be limited to 10 hours or less.
<VulnDiscussion>In Kerberos, there are two types of tickets: Ticket Granting Tickets (TGTs) and Service Tickets. Kerberos tickets have a limi...Rule Medium Severity -
SRG-OS-000112-GPOS-00057
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Kerberos policy user ticket renewal maximum lifetime must be limited to seven days or less.
<VulnDiscussion>This setting determines the period of time (in days) during which a user's TGT may be renewed. This security configuration li...Rule Medium Severity -
SRG-OS-000112-GPOS-00057
<GroupDescription></GroupDescription>Group -
Windows Server 2019 computer clock synchronization tolerance must be limited to five minutes or less.
<VulnDiscussion>This setting determines the maximum time difference (in minutes) that Kerberos will tolerate between the time on a client's c...Rule Medium Severity -
SRG-OS-000118-GPOS-00060
<GroupDescription></GroupDescription>Group -
Windows Server 2019 outdated or unused accounts must be removed or disabled.
<VulnDiscussion>Outdated or unused accounts provide penetration points that may go undetected. Inactive accounts must be deleted if no longer...Rule Medium Severity -
SRG-OS-000120-GPOS-00061
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Kerberos encryption types must be configured to prevent the use of DES and RC4 encryption suites.
<VulnDiscussion>Certain encryption types are no longer considered secure. The DES and RC4 encryption suites must not be used for Kerberos enc...Rule Medium Severity -
SRG-OS-000121-GPOS-00062
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must have the built-in guest account disabled.
<VulnDiscussion>A system faces an increased vulnerability threat if the built-in guest account is not disabled. This is a known account that ...Rule Medium Severity -
SRG-OS-000123-GPOS-00064
<GroupDescription></GroupDescription>Group -
Windows Server 2019 must automatically remove or disable emergency accounts after the crisis is resolved or within 72 hours.
<VulnDiscussion>Emergency administrator accounts are privileged accounts established in response to crisis situations where the need for rapi...Rule Medium Severity -
SRG-OS-000125-GPOS-00065
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Windows Remote Management (WinRM) client must not use Basic authentication.
<VulnDiscussion>Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will...Rule High Severity -
Windows Server 2019 Windows Remote Management (WinRM) client must not use Digest authentication.
<VulnDiscussion>Digest authentication is not as strong as other options and may be subject to man-in-the-middle attacks. Disallowing Digest a...Rule Medium Severity -
SRG-OS-000125-GPOS-00065
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Windows Remote Management (WinRM) service must not use Basic authentication.
<VulnDiscussion>Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will...Rule High Severity -
SRG-OS-000134-GPOS-00068
<GroupDescription></GroupDescription>Group -
Windows Server 2019 administrator accounts must not be enumerated during elevation.
<VulnDiscussion>Enumeration of administrator accounts when elevating can provide part of the logon information to an unauthorized user. This ...Rule Medium Severity -
SRG-OS-000134-GPOS-00068
<GroupDescription></GroupDescription>Group -
Windows Server 2019 local administrator accounts must have their privileged token filtered to prevent elevated privileges from being used over the network on domain-joined member servers.
<VulnDiscussion>A compromised local administrator account can provide means for an attacker to move laterally between domain systems. With U...Rule Medium Severity -
SRG-OS-000134-GPOS-00068
<GroupDescription></GroupDescription>Group -
Windows Server 2019 UIAccess applications must not be allowed to prompt for elevation without using the secure desktop.
<VulnDiscussion>User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative account...Rule Medium Severity -
SRG-OS-000134-GPOS-00068
<GroupDescription></GroupDescription>Group -
Windows Server 2019 User Account Control must, at a minimum, prompt administrators for consent on the secure desktop.
<VulnDiscussion>User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative account...Rule Medium Severity -
SRG-OS-000134-GPOS-00068
<GroupDescription></GroupDescription>Group -
Windows Server 2019 User Account Control must be configured to detect application installations and prompt for elevation.
<VulnDiscussion>User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative account...Rule Medium Severity -
Windows Server 2019 User Account Control (UAC) must only elevate UIAccess applications that are installed in secure locations.
<VulnDiscussion>UAC is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. T...Rule Medium Severity -
SRG-OS-000134-GPOS-00068
<GroupDescription></GroupDescription>Group -
Windows Server 2019 User Account Control (UAC) must virtualize file and registry write failures to per-user locations.
<VulnDiscussion>UAC is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. T...Rule Medium Severity -
SRG-OS-000138-GPOS-00069
<GroupDescription></GroupDescription>Group -
Windows Server 2019 non-system-created file shares must limit access to groups that require it.
<VulnDiscussion>Shares on a system provide network access. To prevent exposing sensitive information, where shares are necessary, permissions...Rule Medium Severity -
SRG-OS-000138-GPOS-00069
<GroupDescription></GroupDescription>Group -
Windows Server 2019 Remote Desktop Services must prevent drive redirection.
<VulnDiscussion>Preventing users from sharing the local drives on their client computers with Remote Session Hosts that they access helps red...Rule Medium Severity -
SRG-OS-000138-GPOS-00069
<GroupDescription></GroupDescription>Group -
Windows Server 2019 data files owned by users must be on a different logical partition from the directory server data files.
<VulnDiscussion>When directory service data files, especially for directories used for identification, authentication, or authorization, resi...Rule Medium Severity
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