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Check: WN19-DC-000401

Microsoft Windows Server 2019 STIG: WN19-DC-000401 (in version v3 r3)

Title

Windows Server 2019 must be configured for named-based strong mappings for certificates. (Cat II impact)

Discussion

Weak mappings give rise to security vulnerabilities and demand hardening measures. Certificate names must be correctly mapped to the intended user account in Active Directory. A lack of strong name-based mappings allows certain weak certificate mappings, such as Issuer/Subject AltSecID and User Principal Names (UPN) mappings, to be treated as strong mappings.

Check Content

This applies to domain controllers. This is not applicable for member servers. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Administrative Template >> System >> KDC >> Allow name-based strong mappings for certificates. If "Allow name-based strong mappings for certificates" is not "Enabled", this is a finding.

Fix Text

Configure the policy value for Computer Configuration >> Administrative Template >> System >> KDC >> Allow name-based strong mappings for certificates to "Enabled".

Additional Identifiers

Rule ID: SV-271429r1059566_rule

Vulnerability ID: V-271429

Group Title: SRG-OS-000080-GPOS-00048

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CCIs

CCIs tied to check.

Number	Definition
CCI-000213	Enforce approved authorizations for logical access to information and system resources in accordance with applicable access control policies.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-3	Access Enforcement