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XCCDF
Active Directory Domain Security Technical Implementation Guide
SRG-OS-000076
All accounts, privileged and unprivileged, that require smart cards must have the underlying NT hash rotated at least every 60 days.
All accounts, privileged and unprivileged, that require smart cards must have the underlying NT hash rotated at least every 60 days.
An XCCDF Rule
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All accounts, privileged and unprivileged, that require smart cards must have the underlying NT hash rotated at least every 60 days.
Medium Severity
<VulnDiscussion>When a smart card is required for a domain account, a long password, unknown to the user, is generated. This password and associated NT hash are not changed as are accounts with passwords controlled by the maximum password age. Disabling and reenabling the "Smart card is required for interactive logon" (SCRIL) replaces the NT hash of the account with a newly randomized hash. Otherwise, the existing NT hash could be reused for Pass-the-Hash in the future. Windows Server 2016 includes a built-in feature for SCRIL hash rolling that will automatically reset NT hashes in accordance with the existing maximum password age policy. This requires the domain functional level to be Windows Server 2016. In Active Directory with a domain functional level below Windows Server 2016, scripts can be used to reset the NT hashes of all domain accounts. Associated documentation should be reviewed for potential issues.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>