The Cisco Multicast Source Discovery Protocol (MSDP) router must be configured to limit the amount of source-active messages it accepts on a per-peer basis.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-216637 | CISC-RT-000940 | SV-216637r531085_rule | Low |
| Description |
| To reduce any risk of a denial-of-service (DoS) attack from a rogue or misconfigured MSDP router, the router must be configured to limit the number of source-active messages it accepts from each peer. |
| STIG | Date |
| Cisco IOS Router RTR Security Technical Implementation Guide | 2024-11-25 |
Details
| Check Text (C-17872r287280_chk) |
| Review the router configuration to determine if it is configured to limit the amount of source-active messages it accepts on a per-peer basis. ip msdp peer x.1.28.2 remote-as nn ip msdp sa-filter in 10.1.28.2 list MSDP_SA_FILTER ip msdp sa-limit X.1.28.2 nnn If the router is not configured to limit the source-active messages it accepts, this is a finding. |
| Fix Text (F-17868r287281_fix) |
| Configure the router to limit the amount of source-active messages it accepts from each peer. R8(config)#ip msdp sa-limit x.1.28.2 nnn |