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The Juniper Multicast Source Discovery Protocol (MSDP) router must be configured to limit the amount of source-active messages it accepts on per-peer basis.


Overview

Finding ID Version Rule ID IA Controls Severity
V-90977 JUNI-RT-000930 SV-101187r1_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
Juniper Router RTR Security Technical Implementation Guide 2020-06-04

Details

Check Text ( C-90241r2_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.

protocols {
…
…
…
}
msdp {
export SA_EXPORT;
import SA_IMPORT;
group AS25 {
peer x.x.x.x {
active-source-limit {
maximum nnn;
}

If the router is not configured to limit the source-active messages it accepts, this is a finding.
Fix Text (F-97285r2_fix)
Configure the router to limit the amount of source-active messages it accepts from each peer.

[edit protocols msdp group AS25 peer x.x.x.x]
set active-source-limit maximum nnn