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II - Mission Support Classified

Rules and Groups employed by this XCCDF Profile

  • 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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