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I - Mission Critical Sensitive

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000362-RTR-000123

    <GroupDescription></GroupDescription>
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  • The Arista multicast Designated Router (DR) must be configured to increase the shortest-path tree (SPT) threshold or set it to infinity to minimalize source-group (S, G) state within the multicast topology where Any Source Multicast (ASM) is deployed.

    &lt;VulnDiscussion&gt;ASM can have many sources for the same groups (many-to-many). For many receivers, the path via the RP may not be ideal compar...
    Rule Medium Severity
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  • SRG-NET-000362-RTR-000124

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

    &lt;VulnDiscussion&gt;GTSM is designed to protect a router's IP-based control plane from DoS attacks. Many attacks focused on CPU load and line-car...
    Rule Low Severity
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  • SRG-NET-000364-RTR-000109

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to only allow incoming communications from authorized sources to be routed to authorized destinations.

    &lt;VulnDiscussion&gt;Unrestricted traffic may contain malicious traffic that poses a threat to an enclave or to other connected networks. Addition...
    Rule Medium Severity
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  • SRG-NET-000364-RTR-000110

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to block inbound packets with source Bogon IP address prefixes.

    &lt;VulnDiscussion&gt;Bogons include IP packets on the public internet that contain addresses that are not in any range allocated or delegated by t...
    Rule Medium Severity
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  • SRG-NET-000364-RTR-000111

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to have Link Layer Discovery Protocols (LLDPs) disabled on all external interfaces.

    &lt;VulnDiscussion&gt;LLDPs are primarily used to obtain protocol addresses of neighboring devices and discover platform capabilities of those devi...
    Rule Low Severity
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  • SRG-NET-000364-RTR-000112

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to have Proxy ARP disabled on all external interfaces.

    &lt;VulnDiscussion&gt;When Proxy ARP is enabled on a Cisco router, it allows that router to extend the network (at Layer 2) across multiple interfa...
    Rule Medium Severity
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  • SRG-NET-000364-RTR-000113

    <GroupDescription></GroupDescription>
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  • The Arista perimeter router must be configured to block all outbound management traffic.

    &lt;VulnDiscussion&gt;For in-band management, the management network must have its own subnet in order to enforce control and access boundaries pro...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000114

    <GroupDescription></GroupDescription>
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  • The Arista multicast Designated Router (DR) must be configured to filter the Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Report messages to allow hosts to join only multicast groups that have been approved by the organization.

    &lt;VulnDiscussion&gt;Real-time multicast traffic can entail multiple large flows of data. Large unicast flows tend to be fairly isolated (i.e., so...
    Rule Low Severity
    Show

  • SRG-NET-000364-RTR-000115

    <GroupDescription></GroupDescription>
    Group
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  • The Arista multicast Designated Router (DR) must be configured to filter the Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Report messages to allow hosts to join a multicast group only from sources that have been approved by the organization.

    &lt;VulnDiscussion&gt;Real-time multicast traffic can entail multiple large flows of data. Large unicast flows tend to be fairly isolated (i.e., so...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000116

    <GroupDescription></GroupDescription>
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  • The Arista Multicast Source Discovery Protocol (MSDP) router must be configured to only accept MSDP packets from known MSDP peers.

    &lt;VulnDiscussion&gt;MSDP peering with customer network routers presents additional risks to the DISN Core, whether from a rogue or misconfigured ...
    Rule Medium Severity
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  • SRG-NET-000512-RTR-000001

    <GroupDescription></GroupDescription>
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  • The Arista BGP router must be configured to use its loopback address as the source address for iBGP peering sessions.

    &lt;VulnDiscussion&gt;Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability o...
    Rule Low Severity
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  • SRG-NET-000512-RTR-000002

    <GroupDescription></GroupDescription>
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  • The MPLS router must be configured to use its loopback address as the source address for LDP peering sessions.

    &lt;VulnDiscussion&gt;Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability o...
    Rule Low Severity
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  • SRG-NET-000512-RTR-000003

    <GroupDescription></GroupDescription>
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  • The MPLS router must be configured to synchronize IGP and LDP to minimize packet loss when an IGP adjacency is established prior to LDP peers completing label exchange.

    &lt;VulnDiscussion&gt;Packet loss can occur when an IGP adjacency is established and the router begins forwarding packets using the new adjacency b...
    Rule Low Severity
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  • SRG-NET-000512-RTR-000004

    <GroupDescription></GroupDescription>
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  • The MPLS router must be configured to have TTL propagation disabled.

    &lt;VulnDiscussion&gt;The head end of the label-routered path (LSP), the label edge router (LER) will decrement the IP packet's time-to-live (TTL) ...
    Rule Medium Severity
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  • SRG-NET-000512-RTR-000005

    <GroupDescription></GroupDescription>
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  • The PE router must be configured to have each Virtual Routing and Forwarding (VRF) instance bound to the appropriate physical or logical interfaces to maintain traffic separation between all MPLS L3VPNs.

    &lt;VulnDiscussion&gt;The primary security model for an MPLS L3VPN infrastructure is traffic separation. The service provider must guarantee the cu...
    Rule High Severity
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  • SRG-NET-000512-RTR-000006

    <GroupDescription></GroupDescription>
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  • The PE router must be configured to have each Virtual Routing and Forwarding (VRF) instance with the appropriate Route Target (RT).

    &lt;VulnDiscussion&gt;The primary security model for an MPLS L3VPN as well as a VRF-lite infrastructure is traffic separation. Each interface can o...
    Rule High Severity
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  • SRG-NET-000512-RTR-000007

    <GroupDescription></GroupDescription>
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  • The PE router must be configured to have each VRF with the appropriate Route Distinguisher (RD).

    &lt;VulnDiscussion&gt;An RD provides uniqueness to the customer address spaces within the MPLS L3VPN infrastructure. The concept of the VPN-IPv4 an...
    Rule Medium Severity
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  • SRG-NET-000512-RTR-000008

    <GroupDescription></GroupDescription>
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  • The PE router providing MPLS Virtual Private Wire Service (VPWS) must be configured to have the appropriate virtual circuit identification (VC ID) for each attachment circuit.

    &lt;VulnDiscussion&gt;VPWS is an L2VPN technology that provides a virtual circuit between two PE routers to forward Layer 2 frames between two cust...
    Rule High Severity
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  • SRG-NET-000512-RTR-000011

    <GroupDescription></GroupDescription>
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  • The Arista Multicast Source Discovery Protocol (MSDP) router must be configured to use its loopback address as the source address when originating MSDP traffic.

    &lt;VulnDiscussion&gt;Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability o...
    Rule Low Severity
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  • SRG-NET-000512-RTR-000012

    <GroupDescription></GroupDescription>
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  • The Arista 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 Arista 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

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  • The Arista 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-000205-RTR-000015

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

    &lt;VulnDiscussion&gt;Packets with IP options are not fast routered and henceforth must be punted to the router processor. Hackers who initiate den...
    Rule Medium Severity
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  • SRG-NET-000205-RTR-000016

    <GroupDescription></GroupDescription>
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  • The 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 routered and therefore must be punted to the router processor. Hackers who initiate deni...
    Rule Medium Severity
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