The Cisco Multicast Source Discovery Protocol (MSDP) switch 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-101853 | CISC-RT-000940 | SV-110957r1_rule | Low |
| Description |
|---|
| To reduce any risk of a denial-of-service (DoS) attack from a rogue or misconfigured MSDP switch, the switch must be configured to limit the number of source-active messages it accepts from each peer. |
| STIG | Date |
|---|---|
| Cisco IOS-XE Switch RTR Security Technical Implementation Guide | 2020-05-20 |
Details
| Check Text ( C-100741r1_chk ) |
|---|
| Review the switch 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 switch is not configured to limit the source-active messages it accepts, this is a finding. |
| Fix Text (F-107535r1_fix) |
|---|
| Configure the switch to limit the amount of source-active messages it accepts from each peer. SW1(config)#ip msdp sa-limit x.1.28.2 nnn |