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Microsoft Windows Server Domain Name System (DNS) Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-APP-000394-DNS-000049

    <GroupDescription></GroupDescription>
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  • The secondary Windows DNS name servers must cryptographically authenticate zone transfers from primary name servers.

    &lt;VulnDiscussion&gt;Authenticity of zone transfers within Windows Active Directory (AD)-integrated zones is accomplished by AD replication. Witho...
    Rule Medium Severity
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  • SRG-APP-000001-DNS-000001

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  • The Windows DNS primary server must only send zone transfers to a specific list of secondary name servers.

    &lt;VulnDiscussion&gt;Primary name servers also make outbound connection to secondary name servers to provide zone transfers and accept inbound con...
    Rule Medium Severity
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  • SRG-APP-000347-DNS-000041

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  • The Windows DNS Server must provide its identity with returned DNS information by enabling DNSSEC and TSIG/SIG(0).

    &lt;VulnDiscussion&gt;Weakly bound credentials can be modified without invalidating the credential; therefore, nonrepudiation can be violated. Thi...
    Rule Medium Severity
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  • SRG-APP-000176-DNS-000017

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  • The Windows DNS Server must be configured to enforce authorized access to the corresponding private key.

    &lt;VulnDiscussion&gt;The cornerstone of the PKI is the private key used to encrypt or digitally sign information. If the private key is stolen, th...
    Rule Medium Severity
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  • SRG-APP-000176-DNS-000018

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  • The Windows DNS Server key file must be owned by the account under which the Windows DNS Server service is run.

    &lt;VulnDiscussion&gt;To enable zone transfer (requests and responses) through authenticated messages, it is necessary to generate a key for every ...
    Rule Medium Severity
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  • SRG-APP-000176-DNS-000019

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  • The Windows DNS Server permissions must be set so the key file can only be read or modified by the account that runs the name server software.

    &lt;VulnDiscussion&gt;To enable zone transfer (requests and responses) through authenticated messages, it is necessary to generate a key for every ...
    Rule Medium Severity
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  • SRG-APP-000176-DNS-000094

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  • The private key corresponding to the zone signing key (ZSK) must only be stored on the name server that does support dynamic updates.

    &lt;VulnDiscussion&gt;The private keys in the key signing key (KSK) and ZSK key pairs must be protected from unauthorized access. If possible, the ...
    Rule Medium Severity
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  • SRG-APP-000401-DNS-000051

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  • The Windows DNS Server must implement a local cache of revocation data for PKI authentication.

    &lt;VulnDiscussion&gt;Not configuring a local cache of revocation data could allow access to users who are no longer authorized (users with revoked...
    Rule Medium Severity
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  • SRG-APP-000516-DNS-000077

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  • The salt value for zones signed using NSEC3 resource records (RRs) must be changed every time the zone is completely re-signed.

    &lt;VulnDiscussion&gt;NSEC records list the resource record types for the name, as well as the name of the next resource record. With this informat...
    Rule Medium Severity
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  • SRG-APP-000213-DNS-000024

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  • The Windows DNS Server must include data origin with authoritative data the system returns in response to external name/address resolution queries.

    &lt;VulnDiscussion&gt;The underlying feature in the major threat associated with DNS query/response (i.e., forged response or response failure) is ...
    Rule Medium Severity
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  • SRG-APP-000420-DNS-000053

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  • The Windows DNS Server's IP address must be statically defined and configured locally on the server.

    &lt;VulnDiscussion&gt;The major threat associated with DNS forged responses or failures is the integrity of the DNS data returned in the response. ...
    Rule Medium Severity
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  • SRG-APP-000420-DNS-000053

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  • The Windows DNS Server must return data information in response to internal name/address resolution queries.

    &lt;VulnDiscussion&gt;The major threat associated with DNS forged responses or failures is the integrity of the DNS data returned in the response. ...
    Rule Medium Severity
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  • SRG-APP-000421-DNS-000054

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  • The Windows DNS Server must, when a component failure is detected, activate a notification to the system administrator.

    &lt;VulnDiscussion&gt;Predictable failure prevention requires organizational planning to address system failure issues. If components key to mainta...
    Rule Medium Severity
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  • SRG-APP-000473-DNS-000072

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  • The Windows DNS Server must verify the correct operation of security functions upon startup and/or restart, upon command by a user with privileged access, and/or every 30 days.

    &lt;VulnDiscussion&gt;Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing t...
    Rule Medium Severity
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  • SRG-APP-000473-DNS-000072

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  • The Windows DNS Server must use DNSSEC data within queries to confirm data origin to DNS resolvers.

    &lt;VulnDiscussion&gt;The major threat associated with DNS forged responses or failures is the integrity of the DNS data returned in the response. ...
    Rule Medium Severity
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  • SRG-APP-000422-DNS-000055

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  • WINS lookups must be disabled on the Windows DNS Server.

    &lt;VulnDiscussion&gt;The major threat associated with DNS forged responses or failures is the integrity of the DNS data returned in the response. ...
    Rule Medium Severity
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  • SRG-APP-000422-DNS-000055

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  • The Windows DNS Server must use DNSSEC data within queries to confirm data integrity to DNS resolvers.

    &lt;VulnDiscussion&gt;The major threat associated with DNS forged responses or failures is the integrity of the DNS data returned in the response. ...
    Rule Medium Severity
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  • SRG-APP-000214-DNS-000025

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  • The Windows DNS Server must be configured with the Delegation Signer (DS) Resource Records (RR) carrying the signature for the RR that contains the public key of the child zone.

    &lt;VulnDiscussion&gt;If name server replies are invalid or cannot be validated, many networking functions and communication would be adversely aff...
    Rule Medium Severity
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  • SRG-APP-000215-DNS-000003

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  • The Windows DNS Server must enforce approved authorizations between DNS servers using digital signatures in the Resource Record Set (RRSet).

    &lt;VulnDiscussion&gt;A mechanism to detect and prevent unauthorized communication flow must be configured or provided as part of the system design...
    Rule Medium Severity
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  • SRG-APP-000215-DNS-000003

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  • The Name Resolution Policy Table (NRPT) must be configured in Group Policy to enforce clients to request DNSSEC validation for a domain.

    &lt;VulnDiscussion&gt;The NRPT is used to require DNSSEC validation. The NRPT can be configured in local Group Policy for a single computer or doma...
    Rule Medium Severity
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  • SRG-APP-000215-DNS-000026

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  • The Windows DNS Server must be configured to validate an authentication chain of parent and child domains via response data.

    &lt;VulnDiscussion&gt;If name server replies are invalid or cannot be validated, many networking functions and communication would be adversely aff...
    Rule Medium Severity
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  • SRG-APP-000215-DNS-000026

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  • Trust anchors must be exported from authoritative Windows DNS Servers and distributed to validating Windows DNS Servers.

    &lt;VulnDiscussion&gt;If name server replies are invalid or cannot be validated, many networking functions and communication would be adversely aff...
    Rule Medium Severity
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  • SRG-APP-000215-DNS-000026

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  • Automatic Update of Trust Anchors must be enabled on key rollover.

    &lt;VulnDiscussion&gt;A trust anchor is a preconfigured public key associated with a specific zone. A validating DNS server must be configured with...
    Rule Medium Severity
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  • SRG-APP-000423-DNS-000056

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  • The Windows DNS secondary servers must request data origin authentication verification from the primary server when requesting name/address resolution.

    &lt;VulnDiscussion&gt;If data origin authentication and data integrity verification are not performed, the resultant response could be forged, it m...
    Rule Medium Severity
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  • SRG-APP-000424-DNS-000057

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  • The Windows DNS secondary server must request data integrity verification from the primary server when requesting name/address resolution.

    &lt;VulnDiscussion&gt;If data origin authentication and data integrity verification are not performed, the resultant response could be forged, it m...
    Rule Medium Severity
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