The network element must authenticate all IGP peers.

From Infrastructure Router Security Technical Implementation Guide Cisco

Part of Interior routing protocols are not authenticated.

SV-15290r2_rule The network element must authenticate all IGP peers.

Vulnerability discussion

A rogue router could send a fictitious routing update to convince a site’s premise router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to learn confidential information of the site’s network, or merely used to disrupt the network’s ability to effectively communicate with other networks.

Check content

Review the device configuration to determine if authentication is configured for all IGP peers. If authentication is not configured for all IGP peers, this is a finding.

Fix text

Configure authentication for all IGP peers.

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