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V-221143

CAT II (Medium)

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

Rule ID

SV-221143r999752_rule

STIG

Cisco NX OS Switch RTR Security Technical Implementation Guide

Version

V3R4

CCIs

CCI-001958

Discussion

MSDP peering with customer network switches presents additional risks to the core, whether from a rogue or misconfigured MSDP-enabled switch. 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 switch configuration to determine if received MSDP packets are authenticated.

ip msdp peer x.1.28.2 remote-as nn
ip msdp password peer x.1.28.2 xxxxxxxxxxxx

ip msdp peer x.1.28.2 connect-source Ethernet2/3 remote-as 8
ip msdp password x.1.28.2 3 3ec66c90c104ad13

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

Fix Text

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

SW1(config)# ip msdp password x.1.28.2 xxxxxxxxxxxx