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Cisco IOS XE Switch RTR Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The Cisco PE switch must be configured with Unicast Reverse Path Forwarding (uRPF) loose mode enabled on all CE-facing interfaces.

    <VulnDiscussion>The uRPF feature is a defense against spoofing and denial-of-service (DoS) attacks by verifying if the source address of any ...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000016

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco PE switch must be configured to ignore or drop all packets with any IP options.

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

  • SRG-NET-000193-RTR-000113

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco PE switch must be configured to enforce a Quality-of-Service (QoS) policy to provide preferred treatment for mission-critical applications.

    &lt;VulnDiscussion&gt;Different applications have unique requirements and toleration levels for delay, jitter, bandwidth, packet loss, and availabi...
    Rule Low Severity
    Show

  • SRG-NET-000193-RTR-000114

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco P switch must be configured to enforce a Quality-of-Service (QoS) policy to provide preferred treatment for mission-critical applications.

    &lt;VulnDiscussion&gt;Different applications have unique requirements and toleration levels for delay, jitter, bandwidth, packet loss, and availabi...
    Rule Low Severity
    Show

  • SRG-NET-000193-RTR-000112

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to enforce a Quality-of-Service (QoS) policy to limit the effects of packet flooding denial-of-service (DoS) attacks.

    &lt;VulnDiscussion&gt;DoS is a condition when a resource is not available for legitimate users. Packet flooding distributed denial-of-service (DDoS...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000003

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast switch must be configured to disable Protocol Independent Multicast (PIM) on all interfaces that are not required to support multicast routing.

    &lt;VulnDiscussion&gt;If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or ...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000004

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast switch must be configured to bind a Protocol Independent Multicast (PIM) neighbor filter to interfaces that have PIM enabled.

    &lt;VulnDiscussion&gt;PIM is a routing protocol used to build multicast distribution trees for forwarding multicast traffic across the network infr...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000005

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast edge switch must be configured to establish boundaries for administratively scoped multicast traffic.

    &lt;VulnDiscussion&gt;If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or ...
    Rule Low Severity
    Show

  • SRG-NET-000362-RTR-000120

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast Rendezvous Point (RP) switch must be configured to limit the multicast forwarding cache so that its resources are not saturated by managing an overwhelming number of Protocol Independent Multicast (PIM) and Multicast Source Discovery Protocol (MSDP) source-active entries.

    &lt;VulnDiscussion&gt;MSDP peering between networks enables sharing of multicast source information. Enclaves with an existing multicast topology u...
    Rule Low Severity
    Show

  • SRG-NET-000019-RTR-000013

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast Rendezvous Point (RP) switch must be configured to filter Protocol Independent Multicast (PIM) Register messages received from the Designated switch (DR) for any undesirable multicast groups and sources.

    &lt;VulnDiscussion&gt;Real-time multicast traffic can entail multiple large flows of data. An attacker can flood a network segment with multicast p...
    Rule Low Severity
    Show

  • SRG-NET-000019-RTR-000014

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast Rendezvous Point (RP) switch must be configured to filter Protocol Independent Multicast (PIM) Join messages received from the Designated Cisco switch (DR) for any undesirable multicast groups.

    &lt;VulnDiscussion&gt;Real-time multicast traffic can entail multiple large flows of data. An attacker can flood a network segment with multicast p...
    Rule Low Severity
    Show

  • SRG-NET-000362-RTR-000121

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast Rendezvous Point (RP) must be configured to rate limit the number of Protocol Independent Multicast (PIM) Register messages.

    &lt;VulnDiscussion&gt;When a new source starts transmitting in a PIM Sparse Mode network, the DR will encapsulate the multicast packets into regist...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000114

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast Designated switch (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
    Show

  • The Cisco multicast Designated switch (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-000362-RTR-000122

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast Designated switch (DR) must be configured to limit the number of mroute states resulting from Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Host Membership Reports.

    &lt;VulnDiscussion&gt;The current multicast paradigm can let any host join any multicast group at any time by sending an IGMP or MLD membership rep...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000123

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco multicast Designated switch (DR) must be configured to set the shortest-path tree (SPT) threshold 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
    Show

  • SRG-NET-000364-RTR-000116

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to only accept MSDP packets from known MSDP peers.

    &lt;VulnDiscussion&gt;MSDP peering with customer network switches presents additional risks to the DISN Core, whether from a rogue or misconfigured...
    Rule Medium Severity
    Show

  • SRG-NET-000343-RTR-000002

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to authenticate all received MSDP packets.

    &lt;VulnDiscussion&gt;MSDP peering with customer network switches presents additional risks to the core, whether from a rogue or misconfigured MSDP...
    Rule Medium Severity
    Show

  • SRG-NET-000018-RTR-000007

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to filter received source-active multicast advertisements for any undesirable multicast groups and sources.

    &lt;VulnDiscussion&gt;The interoperability of BGP extensions for interdomain multicast routing and MSDP enables seamless connectivity of multicast ...
    Rule Low Severity
    Show

  • SRG-NET-000018-RTR-000008

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to filter source-active multicast advertisements to external MSDP peers to avoid global visibility of local-only multicast sources and groups.

    &lt;VulnDiscussion&gt;To avoid global visibility of local information, there are a number of source-group (S, G) states in a PIM-SM domain that mus...
    Rule Low Severity
    Show

  • SRG-NET-000018-RTR-000009

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to limit the amount of source-active messages it accepts on a per-peer basis.

    &lt;VulnDiscussion&gt;To reduce any risk of a denial-of-service (DoS) attack from a rogue or misconfigured MSDP switch, the switch must be configur...
    Rule Low Severity
    Show

  • SRG-NET-000512-RTR-000011

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to use a 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
    Show

  • SRG-NET-000512-RTR-000100

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch 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
    Show

  • SRG-NET-000512-RTR-000012

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to advertise a hop limit of at least 32 in Switch 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
    Show

  • SRG-NET-000512-RTR-000013

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch 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
    Show

  • SRG-NET-000512-RTR-000014

    <GroupDescription></GroupDescription>
    Group
    Show

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