The Arista Multilayer Switch must enable neighbor router authentication for control plane protocols except IS-IS and RIP.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-60913	AMLS-L3-000220	SV-75371r1_rule		Medium

Description
A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to learn confidential information about the site's network or merely used to disrupt the network's ability to communicate with other networks. This is known as a "traffic attraction attack" and is prevented by configuring neighbor router authentication for routing updates. This requirement applies to all IPv4 and IPv6 protocols that are used to exchange routing or packet forwarding information; this includes all Interior Gateway Protocols (such as OSPF, EIGRP, and IS-IS) and Exterior Gateway Protocols (such as BGP), MPLS-related protocols (such as LDP), and Multicast-related protocols.

Description

A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to learn confidential information about the site's network or merely used to disrupt the network's ability to communicate with other networks. This is known as a "traffic attraction attack" and is prevented by configuring neighbor router authentication for routing updates. This requirement applies to all IPv4 and IPv6 protocols that are used to exchange routing or packet forwarding information; this includes all Interior Gateway Protocols (such as OSPF, EIGRP, and IS-IS) and Exterior Gateway Protocols (such as BGP), MPLS-related protocols (such as LDP), and Multicast-related protocols.

STIG	Date
Arista MLS DCS-7000 Series RTR Security Technical Implementation Guide	2015-07-06

Details

Check Text ( C-61859r1_chk )
Review the router configuration; for every protocol that affects the routing or forwarding tables (where information is exchanged between neighbors), verify that neighbor router authentication is enabled. For BGP, this can be verified via the "show running-config" command and validating that any configured neighbor has an associated password statement. For OSPF, under the interface configuration mode, verify the following statements are configured: ip ospf authentication message-digest ip ospf authentication-key [type] [key] If authentication is not enabled, this is a finding.

Check Text ( C-61859r1_chk )

Review the router configuration; for every protocol that affects the routing or forwarding tables (where information is exchanged between neighbors), verify that neighbor router authentication is enabled.

For BGP, this can be verified via the "show running-config" command and validating that any configured neighbor has an associated password statement. For OSPF, under the interface configuration mode, verify the following statements are configured:

ip ospf authentication message-digest
ip ospf authentication-key [type] [key]

If authentication is not enabled, this is a finding.

Fix Text (F-66625r1_fix)
Configure authentication to be enabled for every protocol that affects the routing or forwarding tables. To configure BGP authentication, in the BGP configuration mode interface, when adding neighbors, include the following statement: neighbor [ip address] password [type] [password] For OSPF, under the interface configuration mode, enter the following commands: ip ospf authentication message-digest ip ospf authentication-key [type] [key]

Fix Text (F-66625r1_fix)

Configure authentication to be enabled for every protocol that affects the routing or forwarding tables.

To configure BGP authentication, in the BGP configuration mode interface, when adding neighbors, include the following statement:

neighbor [ip address] password [type] [password]

For OSPF, under the interface configuration mode, enter the following commands:

ip ospf authentication message-digest
ip ospf authentication-key [type] [key]