STIGQter: STIG Summary: Cisco IOS Switch RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Apr 2021:

The Cisco multicast Designated switch (DR) must be configured to limit the number of mroute states resulting from Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Host Membership Reports.

DISA Rule

SV-220466r622190_rule

Vulnerability Number

V-220466

Group Title

SRG-NET-000362-RTR-000122

Rule Version

CISC-RT-000880

Severity

CAT II

CCI(s)

• CCI-002385 - The information system protects against or limits the effects of organization-defined types of denial of service attacks by employing organization-defined security safeguards.

Weight

10

Fix Recommendation

Configure the DR on a global or interface basis to limit the number of mroute states resulting from IGMP or MLD membership reports.

SW2(config)#int vlan3
SW2(config-if)#ip igmp limit 2

Check Contents

Review the DR configuration to verify that it is limiting the number of mroute states via IGMP or MLD.

Verify IGMP limits have been configured globally or on each host-facing Layer 3 and VLAN interface via the ip igmp limit command as shown in the example below:

interface Vlan3
ip address 10.3.3.3 255.255.255.0
…
…
…
ip igmp limit nn

If the DR is not limiting multicast join requests via IGMP or MLD on a global or interfaces basis, this is a finding.

Vulnerability Number

V-220466

Documentable

False

Rule Version

CISC-RT-000880

Severity Override Guidance

Review the DR configuration to verify that it is limiting the number of mroute states via IGMP or MLD.

Verify IGMP limits have been configured globally or on each host-facing Layer 3 and VLAN interface via the ip igmp limit command as shown in the example below:

interface Vlan3
ip address 10.3.3.3 255.255.255.0
…
…
…
ip igmp limit nn

If the DR is not limiting multicast join requests via IGMP or MLD on a global or interfaces basis, this is a finding.

Check Content Reference

M

Target Key

4065

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