The router must be configured to authenticate all routing protocol messages using NIST-validated FIPS 140-2 message authentication code algorithm.

From Router Security Requirements Guide

Part of SRG-NET-000168-RTR-000078

Associated with: CCI-000803

SV-70021r2_rule The router must be configured to authenticate all routing protocol messages using NIST-validated FIPS 140-2 message authentication code algorithm.

Vulnerability discussion

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 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. However, using clear-text authentication provides little benefit since an attacker can intercept traffic and view the authentication key. This would allow the attacker to use the authentication key in an attack.Since MD5 is vulnerable to "birthday" attacks and may be compromised, routing protocol authentication must use FIPS 140-2 validated algorithms and modules to encrypt the authentication key. 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.

Check content

Review the router configuration to verify it is using a NIST-validated FIPS 140-2 message authentication code algorithm to authenticate routing protocol messages. If a NIST-validated FIPS 140-2 message authentication code algorithm is not being used to authenticate routing protocol messages, this is a finding.

Fix text

Configure routing protocol authentication to use a NIST-validated FIPS 140-2 message authentication code algorithm.

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