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I - Mission Critical Public

Rules and Groups employed by this XCCDF Profile

  • SRG-APP-000473

    <GroupDescription></GroupDescription>
    Group
  • The DNS server implementation must perform verification of the correct operation of security functions: upon system start-up 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
  • SRG-APP-000474

    <GroupDescription></GroupDescription>
    Group
  • The DNS server implementation must log the event and notify the system administrator when anomalies in the operation of the signed zone transfers are discovered.

    &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
  • SRG-APP-000504

    <GroupDescription></GroupDescription>
    Group
  • The DNS implementation must generate audit records for the success and failure of start and stop of the name server service or daemon.

    &lt;VulnDiscussion&gt;Auditing and logging are key components of any security architecture. It is essential for security personnel to know what is ...
    Rule Medium Severity
  • SRG-APP-000504

    <GroupDescription></GroupDescription>
    Group
  • The DNS implementation must generate audit records for the success and failure of all name server events.

    &lt;VulnDiscussion&gt;Auditing and logging are key components of any security architecture. It is essential for security personnel to know what is ...
    Rule Medium Severity
  • SRG-APP-000514

    <GroupDescription></GroupDescription>
    Group
  • The DNS server must implement NIST FIPS-validated cryptography for provisioning digital signatures, generating cryptographic hashes, and protecting unclassified information requiring confidentiality.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The applicatio...
    Rule Medium Severity
  • SRG-APP-000516

    <GroupDescription></GroupDescription>
    Group
  • The salt value for zones signed using NSEC3 RRs must be changed every time the zone is completely re-signed.

    &lt;VulnDiscussion&gt;NSEC3 RRs contain other options than just the (hashed) next name and RRType bitmap. There are also 2 values associated with t...
    Rule Medium Severity
  • SRG-APP-000516

    <GroupDescription></GroupDescription>
    Group
  • The validity period for the RRSIGs covering a zones DNSKEY RRSet must be no less than two days and no more than one week.

    &lt;VulnDiscussion&gt;The best way for a zone administrator to minimize the impact of a key compromise is by limiting the validity period of RRSIGs...
    Rule Medium Severity
  • SRG-APP-000516

    <GroupDescription></GroupDescription>
    Group
  • NSEC3 must be used for all internal DNS zones.

    &lt;VulnDiscussion&gt;To ensure that RRs associated with a query are really missing in a zone file and have not been removed in transit, the DNSSEC...
    Rule Medium Severity
  • SRG-APP-000516

    <GroupDescription></GroupDescription>
    Group
  • The DNS implementation must ensure each NS record in a zone file points to an active name server authoritative for the domain specified in that record.

    &lt;VulnDiscussion&gt;Poorly constructed NS records pose a security risk because they create conditions under which an adversary might be able to p...
    Rule Medium Severity
  • SRG-APP-000516

    <GroupDescription></GroupDescription>
    Group
  • The two files generated by the dnssec-keygen program must be made accessible only to the server administrator account, or deleted, after they have been copied to the key file in the name server.

    &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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