The Juniper multicast Rendezvous Point (RP) router must be configured to filter Protocol Independent Multicast (PIM) Register messages received from the Designated Router (DR) for any undesirable multicast groups and sources.
An XCCDF Rule
Description
<VulnDiscussion>Real-time multicast traffic can entail multiple large flows of data. An attacker can flood a network segment with multicast packets, over-using the available bandwidth and thereby creating a denial-of-service (DoS) condition. Hence, it is imperative that register messages are accepted only for authorized multicast groups and sources.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-217086r604135_rule
- Severity
- Low
- References
- Updated
Remediation - Manual Procedure
Configure the router to filter PIM register messages received from a multicast DR for any undesirable multicast groups and sources.
[edit policy-options policy-statement MULTICAST_REGISTER_POLICY]
set term BAD_SOURCES from source-address-filter x.x.x.x/32 exact
set term BAD_SOURCES from source-address-filter x.x.x.x/24 orlonger
set term BAD_GROUPS from route-filter 224.1.1.0/24 orlonger