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II - Mission Support Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000512

    <GroupDescription></GroupDescription>
    Group
  • The router must be configured to advertise a hop limit of at least 32 in Router Advertisement messages for IPv6 stateless auto-configuration deployments.

    &lt;VulnDiscussion&gt;The Neighbor Discovery protocol allows a hop limit value to be advertised by routers in a Router Advertisement message being ...
    Rule Low Severity
  • SRG-NET-000512

    <GroupDescription></GroupDescription>
    Group
  • The router must not be configured to use IPv6 Site Local Unicast addresses.

    &lt;VulnDiscussion&gt;As currently defined, site local addresses are ambiguous and can be present in multiple sites. The address itself does not co...
    Rule Medium Severity
  • SRG-NET-000512

    <GroupDescription></GroupDescription>
    Group
  • The perimeter router must be configured to suppress Router Advertisements on all external IPv6-enabled interfaces.

    &lt;VulnDiscussion&gt;Many of the known attacks in stateless autoconfiguration are defined in RFC 3756 were present in IPv4 ARP attacks. To mitigat...
    Rule Medium Severity
  • SRG-NET-000364

    <GroupDescription></GroupDescription>
    Group
  • The perimeter router must be configured to drop IPv6 undetermined transport packets.

    &lt;VulnDiscussion&gt;One of the fragmentation weaknesses known in IPv6 is the undetermined transport packet. This packet contains an undetermined ...
    Rule Medium Severity
  • SRG-NET-000364

    <GroupDescription></GroupDescription>
    Group
  • The perimeter router must be configured drop IPv6 packets with a Routing Header type 0, 1, or 3255.

    &lt;VulnDiscussion&gt;The routing header can be used maliciously to send a packet through a path where less robust security is in place, rather tha...
    Rule Medium Severity

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