Title

The Juniper Multicast Source Discovery Protocol (MSDP) router must be configured to authenticate all received MSDP packets. (Cat II impact)

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. protocols { msdp { group AS25 { peer 5.5.5.5 { authentication-key "$8$KspW87GUH.mTxNfz"; ## SECRET-DATA} } } 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: [edit protocols msdp group AS25 peer 5.5.5.5] set authentication-key xxxxxxxx

Additional Identifiers

Rule ID: SV-217094r855912_rule

Vulnerability ID: V-217094

Group Title: SRG-NET-000343-RTR-000002

Expert Comments

CCIs tied to check.

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