Detections
Analytics
JUEX-RT-000790 - The Juniper multicast Designated Router (DR) must be configured to filter the IGMP and MLD Report messages to allow hosts to join a multicast group only from sources that have been approved by the organization.
Information
Real-time multicast traffic can entail multiple large flows of data. Large unicast flows tend to be fairly isolated (i.e., someone downloading a file here or there), whereas multicast can have broader impact on bandwidth consumption, resulting in extreme network congestion. Hence, it is imperative that there is multicast admission control to restrict which multicast groups hosts are allowed to join via IGMP or MLD.NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.
Solution
Configure the DR to filter the IGMP and MLD report messages to allow hosts to join only those multicast groups from sources that have been approved.set policy-options policy-statement <name> term unauth-sources from source-address-filter <IPv4 address>/<mask> orlonger
set policy-options policy-statement <name> term unauth-sources then reject
set policy-options policy-statement <name> term accept-others then accept
set policy-options policy-statement <name IPv6> term unauth-sources from source-address-filter <IPv6 address>/<prefix> orlonger
set policy-options policy-statement <name IPv6> term unauth-sources 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>
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Juniper_EX_Switches_Y26M01_STIG.zip
Item Details
Audit Name: DISA Juniper EX Series Router v2r1
Category: SYSTEM AND COMMUNICATIONS PROTECTION
References: 800-53|SC-7(11), CAT|II, CCI|CCI-002403, Rule-ID|SV-254051r844263_rule, STIG-ID|JUEX-RT-000790, Vuln-ID|V-254051
Plugin: Juniper
Control ID: e2b81477a3874dcc3fc4824b2ea529a69edcd5f9a80280adc27ef7154fa280ec