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V-216729

CAT II (Medium)

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

Rule ID

SV-216729r855835_rule

STIG

Cisco IOS XE Router RTR Security Technical Implementation Guide

Version

V3R5

CCIs

CCI-001958

Discussion

MSDP peering with customer network routers presents additional risks to the core, whether from a rogue or misconfigured MSDP-enabled router. MSDP password authentication is used to validate each segment sent on the TCP connection between MSDP peers, protecting the MSDP session against the threat of spoofed packets being injected into the TCP connection stream.

Check Content

Review the router configuration to determine if received MSDP packets are authenticated.

ip msdp peer x.1.28.8 remote-as 8
ip msdp password peer x.1.28.8 xxxxxxxxxxxx

If the router does not require MSDP authentication, this is a finding.

Fix Text

Configure the router to authenticate MSDP messages as shown in the following example:

R2(config)#ip msdp password peer x.1.28.8 xxxxxxxxxxxx