STIGQter: STIG Summary: Router Security Requirements Guide Version: 4 Release: 2 Benchmark Date: 23 Apr 2021:

The Multicast Source Discovery Protocol (MSDP) router must be configured to filter received source-active multicast advertisements for any undesirable multicast groups and sources.

DISA Rule

SV-207103r604135_rule

Vulnerability Number

V-207103

Group Title

SRG-NET-000018

Rule Version

SRG-NET-000018-RTR-000007

Severity

CAT III

CCI(s)

• CCI-001368 - The information system enforces approved authorizations for controlling the flow of information within the system based on organization-defined information flow control policies.

Weight

10

Fix Recommendation

Configure the MSDP router to implement an import policy to block multicast advertisements for undesirable multicast groups and sources.

Check Contents

Review the router configuration to determine if there is an import policy to block source-active multicast advertisements for any undesirable multicast groups, as well as any (S, G) states with undesirable source addresses.

Step 1: Verify that an inbound source-active filter is bound to each MSDP peer.

Step 2: Review the access lists referenced by the source-active filter to verify that undesirable multicast groups, auto-RP, single source multicast (SSM) groups, and advertisements from undesirable sources are blocked.

If the router is not configured with an import policy to block undesirable SA multicast advertisements, this is a finding.

Vulnerability Number

V-207103

Documentable

False

Rule Version

SRG-NET-000018-RTR-000007

Severity Override Guidance

Review the router configuration to determine if there is an import policy to block source-active multicast advertisements for any undesirable multicast groups, as well as any (S, G) states with undesirable source addresses.

Step 1: Verify that an inbound source-active filter is bound to each MSDP peer.

Step 2: Review the access lists referenced by the source-active filter to verify that undesirable multicast groups, auto-RP, single source multicast (SSM) groups, and advertisements from undesirable sources are blocked.

If the router is not configured with an import policy to block undesirable SA multicast advertisements, this is a finding.

Check Content Reference

M

Target Key

2917

Comments