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.
Review the router configuration to determine if received MSDP packets are authenticated. If the router does not require MSDP authentication, this is a finding.
Ensure all MSDP packets received by an MSDP router are authenticated.