II - Mission Support Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000512-RTR-000007
<GroupDescription></GroupDescription>Group -
The Cisco PE router must be configured to have each VRF with the appropriate Route Distinguisher (RD).
<VulnDiscussion>An RD provides uniqueness to the customer address spaces within the MPLS L3VPN infrastructure. The concept of the VPN-IPv4 an...Rule Medium Severity -
SRG-NET-000343-RTR-000001
<GroupDescription></GroupDescription>Group -
The Cisco PE router providing MPLS Layer 2 Virtual Private Network (L2VPN) services must be configured to authenticate targeted Label Distribution Protocol (LDP) sessions used to exchange virtual circuit (VC) information using a FIPS-approved message authentication code algorithm.
<VulnDiscussion>LDP provides the signaling required for setting up and tearing down pseudowires (virtual circuits used to transport Layer 2 f...Rule Medium Severity -
SRG-NET-000512-RTR-000008
<GroupDescription></GroupDescription>Group -
The Cisco PE router providing MPLS Virtual Private Wire Service (VPWS) must be configured to have the appropriate pseudowire ID for each attachment circuit.
<VulnDiscussion>VPWS is an L2VPN technology that provides a virtual circuit (aka pseudowire) between two PE routers to forward Layer 2 frames...Rule High Severity -
SRG-NET-000512-RTR-000009
<GroupDescription></GroupDescription>Group -
The Cisco PE router providing Virtual Private LAN Services (VPLS) must be configured to have all attachment circuits defined to the virtual forwarding instance (VFI) with the globally unique VPN ID assigned for each customer VLAN.
<VulnDiscussion>VPLS defines an architecture that delivers Ethernet multipoint services over an MPLS network. Customer Layer 2 frames are for...Rule High Severity -
SRG-NET-000512-RTR-000010
<GroupDescription></GroupDescription>Group -
The Cisco PE router must be configured to enforce the split-horizon rule for all pseudowires within a Virtual Private LAN Services (VPLS) bridge domain.
<VulnDiscussion>A virtual forwarding instance (VFI) must be created on each participating PE router for each customer VLAN using VPLS for car...Rule Low Severity -
SRG-NET-000193-RTR-000002
<GroupDescription></GroupDescription>Group -
The Cisco PE router providing Virtual Private LAN Services (VPLS) must be configured to have traffic storm control thresholds on CE-facing interfaces.
<VulnDiscussion>A traffic storm occurs when packets flood a VPLS bridge, creating excessive traffic and degrading network performance. Traffi...Rule Medium Severity -
SRG-NET-000362-RTR-000119
<GroupDescription></GroupDescription>Group -
The Cisco PE router must be configured to implement Internet Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD) snooping for each Virtual Private LAN Services (VPLS) bridge domain.
<VulnDiscussion>IGMP snooping provides a way to constrain multicast traffic at Layer 2. By monitoring the IGMP membership reports sent by hos...Rule Low Severity -
SRG-NET-000192-RTR-000002
<GroupDescription></GroupDescription>Group -
The Cisco PE router must be configured to limit the number of MAC addresses it can learn for each Virtual Private LAN Services (VPLS) bridge domain.
<VulnDiscussion>VPLS defines an architecture that delivers Ethernet multipoint services over an MPLS network. Customer Layer 2 frames are for...Rule Medium Severity -
SRG-NET-000205-RTR-000007
<GroupDescription></GroupDescription>Group -
The Cisco PE router must be configured to block any traffic that is destined to IP core infrastructure.
<VulnDiscussion>IP/MPLS networks providing VPN and transit services must provide, at the least, the same level of protection against denial-o...Rule High Severity -
SRG-NET-000205-RTR-000008
<GroupDescription></GroupDescription>Group -
The Cisco PE router 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 -
SRG-NET-000193-RTR-000113
<GroupDescription></GroupDescription>Group -
The Cisco PE router must be configured to enforce a Quality-of-Service (QoS) policy to provide preferred treatment for mission-critical applications.
<VulnDiscussion>Different applications have unique requirements and toleration levels for delay, jitter, bandwidth, packet loss, and availabi...Rule Low Severity -
SRG-NET-000193-RTR-000114
<GroupDescription></GroupDescription>Group -
The Cisco P router must be configured to enforce a Quality-of-Service (QoS) policy to provide preferred treatment for mission-critical applications.
<VulnDiscussion>Different applications have unique requirements and toleration levels for delay, jitter, bandwidth, packet loss, and availabi...Rule Low Severity -
SRG-NET-000193-RTR-000112
<GroupDescription></GroupDescription>Group -
The Cisco PE router must be configured to enforce a Quality-of-Service (QoS) policy to limit the effects of packet flooding denial-of-service (DoS) attacks.
<VulnDiscussion>DoS is a condition when a resource is not available for legitimate users. Packet flooding distributed denial-of-service (DDoS...Rule Medium Severity -
SRG-NET-000019-RTR-000003
<GroupDescription></GroupDescription>Group -
The Cisco multicast router must be configured to disable Protocol Independent Multicast (PIM) on all interfaces that are not required to support multicast routing.
<VulnDiscussion>If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or ...Rule Medium Severity -
SRG-NET-000019-RTR-000004
<GroupDescription></GroupDescription>Group -
The Cisco multicast router must be configured to bind a Protocol Independent Multicast (PIM) neighbor filter to interfaces that have PIM enabled.
<VulnDiscussion>PIM is a routing protocol used to build multicast distribution trees for forwarding multicast traffic across the network infr...Rule Medium Severity -
SRG-NET-000019-RTR-000005
<GroupDescription></GroupDescription>Group -
The Cisco multicast edge router must be configured to establish boundaries for administratively scoped multicast traffic.
<VulnDiscussion>If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or ...Rule Low Severity -
SRG-NET-000362-RTR-000120
<GroupDescription></GroupDescription>Group -
The Cisco multicast Rendezvous Point (RP) router must be configured to filter Protocol Independent Multicast (PIM) Join messages received from the Designated Router (DR) for any undesirable multicast groups.
<VulnDiscussion>MSDP peering between networks enables sharing of multicast source information. Enclaves with an existing multicast topology u...Rule Low Severity -
SRG-NET-000019-RTR-000013
<GroupDescription></GroupDescription>Group -
The Cisco multicast Rendezvous Point (RP) router must be configured to filter Protocol Independent Multicast (PIM) Register messages received from the Designated Router (DR) for any undesirable multicast groups and sources.
<VulnDiscussion>Real-time multicast traffic can entail multiple large flows of data. An attacker can flood a network segment with multicast p...Rule Low Severity -
SRG-NET-000019-RTR-000014
<GroupDescription></GroupDescription>Group -
The Cisco multicast Rendezvous Point (RP) router must be configured to filter Protocol Independent Multicast (PIM) Join messages received from the Designated Router (DR) for any undesirable multicast groups.
<VulnDiscussion>Real-time multicast traffic can entail multiple large flows of data. An attacker can flood a network segment with multicast p...Rule Low Severity -
SRG-NET-000362-RTR-000121
<GroupDescription></GroupDescription>Group -
The Cisco multicast Rendezvous Point (RP) must be configured to rate limit the number of Protocol Independent Multicast (PIM) Register messages.
<VulnDiscussion>When a new source starts transmitting in a PIM Sparse Mode network, the Designated Router (DR) will encapsulate the multicast...Rule Medium Severity -
SRG-NET-000364-RTR-000114
<GroupDescription></GroupDescription>Group -
The Cisco 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.
<VulnDiscussion>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 -
SRG-NET-000364-RTR-000115
<GroupDescription></GroupDescription>Group -
The Cisco 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.
<VulnDiscussion>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 -
SRG-NET-000362-RTR-000122
<GroupDescription></GroupDescription>Group -
The Cisco multicast Designated Router (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.
<VulnDiscussion>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 -
SRG-NET-000362-RTR-000123
<GroupDescription></GroupDescription>Group -
The Cisco multicast Designated Router (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.
<VulnDiscussion>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 -
SRG-NET-000364-RTR-000116
<GroupDescription></GroupDescription>Group -
The Cisco Multicast Source Discovery Protocol (MSDP) router must be configured to only accept MSDP packets from known MSDP peers.
<VulnDiscussion>MSDP peering with customer network routers presents additional risks to the DISN Core, whether from a rogue or misconfigured ...Rule Medium Severity
Node 2
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