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The Cisco Multicast Source Discovery Protocol (MSDP) switch must be configured to authenticate all received MSDP packets.


Finding ID Version Rule ID IA Controls Severity
V-221065 CISC-RT-000910 SV-221065r856428_rule Medium
MSDP peering with customer network switches presents additional risks to the core, whether from a rogue or misconfigured MSDP-enabled switch. 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.
Cisco IOS XE Switch RTR Security Technical Implementation Guide 2023-09-13


Check Text ( C-22780r408989_chk )
Review the switch configuration to determine if received MSDP packets are authenticated.

ip msdp peer x.1.28.8 remote-as 8
ip msdp password peer x.1.28.8 xxxxxxxxxxxx

If the switch does not require MSDP authentication, this is a finding.
Fix Text (F-22769r408990_fix)
Configure the switch to authenticate MSDP messages as shown in the following example:

SW2(config)#ip msdp password peer x.1.28.8 xxxxxxxxxxxx