STIGQter: STIG Summary: Network Infrastructure Policy Security Technical Implementation Guide Version: 9 Release: 10 Benchmark Date: 24 Jan 2020:

The number of mroute states resulting from Internet Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD) membership reports must be limited.

DISA Rule

SV-80879r1_rule

Vulnerability Number

V-66389

Group Title

NET2014

Rule Version

NET2014

Severity

CAT II

CCI(s)

• CCI-001095 - The information system manages excess capacity, bandwidth, or other redundancy to limit the effects of information flooding types of denial of service attacks.
• 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 Designated Router (DR) on a global or interface basis to limit the number of mroute states resulting from IGMP or MLD membership reports.

Check Contents

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

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

The following is a PIM sparse mode DR configuration example that limits the number of IGMP join requests on both a global and a per-interface basis

ip multicast-routing
ip igmp limit 80
!
interface FastEthernet 0/1
description User LAN121
ip address 192.168.122.1 255.255.255.0
ip pim sparse-mode
ip igmp limit 50
!
interface FastEthernet 0/2
description User LAN122
ip address 192.168.122.1 255.255.255.0
ip pim sparse-mode
ip igmp limit 50

Note: If both global and per interface state limiters are configured, the limits configured for per interface state limiters are still enforced but are constrained by the global limit.

Vulnerability Number

V-66389

Documentable

False

Rule Version

NET2014

Severity Override Guidance

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

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

The following is a PIM sparse mode DR configuration example that limits the number of IGMP join requests on both a global and a per-interface basis

ip multicast-routing
ip igmp limit 80
!
interface FastEthernet 0/1
description User LAN121
ip address 192.168.122.1 255.255.255.0
ip pim sparse-mode
ip igmp limit 50
!
interface FastEthernet 0/2
description User LAN122
ip address 192.168.122.1 255.255.255.0
ip pim sparse-mode
ip igmp limit 50

Note: If both global and per interface state limiters are configured, the limits configured for per interface state limiters are still enforced but are constrained by the global limit.

Check Content Reference

M

Target Key

838

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