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XCCDF
Microsoft Windows Server Domain Name System (DNS) Security Technical Implementation Guide
SRG-APP-000516-DNS-000084
SRG-APP-000516-DNS-000084
An XCCDF Group - A logical subset of the XCCDF Benchmark
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SRG-APP-000516-DNS-000084
1 Rule
<GroupDescription></GroupDescription>
NSEC3 must be used for all internal DNS zones.
Medium Severity
<VulnDiscussion>NSEC records list the resource record types for the name, as well as the name of the next resource record. This information reveals that the resource record type for the name queried, or the resource record name requested, does not exist. NSEC uses the actual resource record names, whereas NSEC3 uses a one-way hash of the name. In this way, walking zone data from one record to the next is prevented at the expense of some CPU cycles on the authoritative server and the resolver. To prevent giving access to an entire zone file, NSEC3 should be configured. To use NSEC3, RSA/SHA-1 should be used as the algorithm, as some resolvers that understand RSA/SHA-1 might not understand NSEC3. Using RSA/SHA-256 is a safe alternative.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>