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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000205-RTR-000014

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter router must be configured to restrict it from accepting outbound IP packets that contain an illegitimate address in the source address field via egress filter or by enabling Unicast Reverse Path Forwarding (uRPF).

    &lt;VulnDiscussion&gt;A compromised host in an enclave can be used by a malicious platform to launch cyberattacks on third parties. This is a commo...
    Rule High Severity
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  • SRG-NET-000205-RTR-000015

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter router must be configured to block all packets with any IP options.

    &lt;VulnDiscussion&gt;Packets with IP options are not fast switched and henceforth must be punted to the router processor. Hackers who initiate den...
    Rule Medium Severity
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  • SRG-NET-000362-RTR-000124

    <GroupDescription></GroupDescription>
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  • The Cisco BGP router must be configured to enable the Generalized TTL Security Mechanism (GTSM).

    &lt;VulnDiscussion&gt;As described in RFC 3682, GTSM is designed to protect a router's IP-based control plane from DoS attacks. Many attacks focuse...
    Rule Low Severity
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  • SRG-NET-000230-RTR-000002

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco BGP router must be configured to use a unique key for each autonomous system (AS) that it peers with.

    &lt;VulnDiscussion&gt;If the same keys are used between eBGP neighbors, the chance of a hacker compromising any of the BGP sessions increases. It i...
    Rule Medium Severity
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  • SRG-NET-000205-RTR-000016

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco PE router must be configured to ignore or block all packets with any IP options.

    &lt;VulnDiscussion&gt;Packets with IP options are not fast switched and therefore must be punted to the router processor. Hackers who initiate deni...
    Rule Medium Severity
    Show

  • SRG-NET-000512-RTR-000100

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to have Cisco Express Forwarding enabled.

    &lt;VulnDiscussion&gt;The Cisco Express Forwarding (CEF) switching mode replaces the traditional Cisco routing cache with a data structure that mir...
    Rule Medium Severity
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  • SRG-NET-000512-RTR-000012

    <GroupDescription></GroupDescription>
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  • The Cisco 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
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  • SRG-NET-000512-RTR-000013

    <GroupDescription></GroupDescription>
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  • The Cisco 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
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  • SRG-NET-000512-RTR-000014

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco 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
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  • SRG-NET-000364-RTR-000200

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco 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
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