Microsoft Windows Server 2019 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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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 Ticket Granting Ticket (TGT) may be renewed. This ...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Windows Server 2019 outdated or unused accounts must be removed or disabled.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Outdated or unused accounts provide penetration points that may go undetected.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 -
SRG-OS-000125-GPOS-00065
<GroupDescription></GroupDescription>Group -
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
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