Title

The Multicast Source Discovery Protocol (MSDP) router must be configured to only accept MSDP packets from known MSDP peers. (Cat II impact)

Discussion

MSDP peering with customer network routers presents additional risks to the DISN Core, whether from a rogue or misconfigured MSDP-enabled router. To guard against an attack from malicious MSDP traffic, the receive path or interface filter for all MSDP-enabled RP routers must be configured to only accept MSDP packets from known MSDP peers.

Check Content

Review the router configuration to determine if there is a receive path or interface filter to only accept MSDP packets from known MSDP peers. If the router is not configured to only accept MSDP packets from known MSDP peers, this is a finding.

Fix Text

Ensure the receive path or interface filter for all MSDP routers only accepts MSDP packets from known MSDP peers.

Additional Identifiers

Rule ID: SV-207170r856654_rule

Vulnerability ID: V-207170

Group Title: SRG-NET-000364

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.