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Domain Name System (DNS) Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-APP-000099

    <GroupDescription></GroupDescription>
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  • The DNS server implementation must produce audit records that contain information to establish the outcome of the events.

    &lt;VulnDiscussion&gt;Without information about the outcome of events, security personnel cannot make an accurate assessment about whether an attac...
    Rule Medium Severity
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  • SRG-APP-000100

    <GroupDescription></GroupDescription>
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  • The DNS server implementations audit records must be backed up at least every seven days onto a different system or system component than the system or component being audited.

    &lt;VulnDiscussion&gt;Protection of log data includes assuring log data is not accidentally lost or deleted. Backing up audit records to a differen...
    Rule Medium Severity
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  • SRG-APP-000142

    <GroupDescription></GroupDescription>
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  • The DNS server implementation must be configured to prohibit or restrict unapproved ports and protocols.

    &lt;VulnDiscussion&gt;In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e....
    Rule Medium Severity
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  • SRG-APP-000158

    <GroupDescription></GroupDescription>
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  • The DNS server implementation must uniquely identify the other DNS server before responding to a server-to-server transaction.

    &lt;VulnDiscussion&gt;Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. This...
    Rule Medium Severity
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  • SRG-APP-000176

    <GroupDescription></GroupDescription>
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  • The DNS server implementation, when using PKI-based authentication, must 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

    <GroupDescription></GroupDescription>
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  • The key file must be owned by the account under which the name server software 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

    <GroupDescription></GroupDescription>
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  • Read/Write access to the key file must be restricted to the account that runs the name server software only.

    &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

    <GroupDescription></GroupDescription>
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  • Only the private key corresponding to the ZSK alone must be kept on the name server that does support dynamic updates.

    &lt;VulnDiscussion&gt;The private keys in the KSK and ZSK key pairs must be protected from unauthorized access. If possible, the private keys shoul...
    Rule Medium Severity
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  • SRG-APP-000176

    <GroupDescription></GroupDescription>
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  • Signature generation using the KSK must be done off-line, using the KSK-private stored off-line.

    &lt;VulnDiscussion&gt;Security-relevant information is any information within information systems that can potentially impact the operation of secu...
    Rule Medium Severity
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  • SRG-APP-000185

    <GroupDescription></GroupDescription>
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  • The DNS server implementation must employ strong authenticators in the establishment of nonlocal maintenance and diagnostic sessions.

    &lt;VulnDiscussion&gt;If maintenance tools are used by unauthorized personnel, they may accidentally or intentionally damage or compromise the syst...
    Rule Medium Severity
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