STIGQter: STIG Summary: Juniper EX Series Switches Router Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 24 Jul 2024:

The Juniper multicast Designated Router (DR) must be configured to filter the IGMP and MLD Report messages to allow hosts to join only multicast groups that have been approved by the organization.

DISA Rule

SV-254050r844262_rule

Vulnerability Number

V-254050

Group Title

SRG-NET-000364-RTR-000114

Rule Version

JUEX-RT-000780

Severity

CAT III

CCI(s)

• CCI-002403 - Only allow incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

10

Fix Recommendation

Configure the DR to filter the IGMP and MLD report messages to allow hosts to join only those multicast groups that have been approved.

set policy-options policy-statement <name> term unauth-groups from route-filter 224.0.1.2/32 exact
set policy-options policy-statement <name> term unauth-groups from route-filter 224.0.2.2/32 exact
set policy-options policy-statement <name> term unauth-groups then reject
set policy-options policy-statement <name> term accept-others then accept

set policy-options policy-statement <name IPv6> term unauth-groups from route-filter fec0:1:1:4::/64 exact
set policy-options policy-statement <name IPv6> term unauth-groups then reject
set policy-options policy-statement <name IPv6> term accept-others then accept

set protocols igmp interface <name>.<logical unit> group-policy <policy name>
set protocols mld interface <name>.<logical unit> group-policy <policy name IPv6>

Check Contents

Review the configuration of the DR to verify that it is filtering IGMP or MLD report messages, allowing hosts to join only those groups that have been approved.

Note: This requirement is only applicable to Source Specific Multicast (SSM) implementation. This requirement is not applicable to Any Source Multicast (ASM) since the filtering is being performed by the Rendezvous Point router.

[edit policy-options]
policy-statement <name> {
term unauth-groups {
from {
route-filter 224.0.1.2/32 exact;
route-filter 224.0.2.2/32 exact;
}
then reject;
}
term allow-others {
then accept;
}
}
policy-statement <name IPv6> {
term unauth-groups {
from {
route-filter fec0:1:1:4::/64 exact;
}
then reject;
}
term allow-others {
then accept;
}
}

[edit protocols]
igmp {
interface <name>.<logical unit> {
group-policy <policy name>;
}
}
mld {
interface <name>.<logical unit> {
group-policy <policy name IPv6>;
}
}

If the DR is not filtering IGMP or MLD report messages, this is a finding.

Vulnerability Number

V-254050

Documentable

False

Rule Version

JUEX-RT-000780

Severity Override Guidance

Review the configuration of the DR to verify that it is filtering IGMP or MLD report messages, allowing hosts to join only those groups that have been approved.

Note: This requirement is only applicable to Source Specific Multicast (SSM) implementation. This requirement is not applicable to Any Source Multicast (ASM) since the filtering is being performed by the Rendezvous Point router.

[edit policy-options]
policy-statement <name> {
term unauth-groups {
from {
route-filter 224.0.1.2/32 exact;
route-filter 224.0.2.2/32 exact;
}
then reject;
}
term allow-others {
then accept;
}
}
policy-statement <name IPv6> {
term unauth-groups {
from {
route-filter fec0:1:1:4::/64 exact;
}
then reject;
}
term allow-others {
then accept;
}
}

[edit protocols]
igmp {
interface <name>.<logical unit> {
group-policy <policy name>;
}
}
mld {
interface <name>.<logical unit> {
group-policy <policy name IPv6>;
}
}

If the DR is not filtering IGMP or MLD report messages, this is a finding.

Check Content Reference

M

Target Key

5479