Hi all, I have looked up RFC 9251 9again) and noticed that it does not list RFC 4604 "Using IGMPv3 and MLDv2 for Source-Specific Multicast" among its references.
I wonder if the highlighted caveat copied below from the Security Considerations section of RFC 4604<https://datatracker.ietf.org/doc/html/rfc4604#section-4> applies to implementations of RFC 9251: It is important that a router not accept non-source-specific reception requests for an SSM destination address. The rules of [IGMPv3<https://datatracker.ietf.org/doc/html/rfc4604#ref-IGMPv3>] and [MLDv2<https://datatracker.ietf.org/doc/html/rfc4604#ref-MLDv2>] require a router, upon receiving such a membership report, to revert to earlier version compatibility mode for the group in question. If the router were to revert in this situation, it would prevent an IGMPv3-capable host from receiving SSM service for that destination address, thus creating a potential for an attacker to deny SSM service to other hosts on the same link. Your timely feedback would be highly appreciated. Regards, and lots of thanks in advance, Sasha Disclaimer This e-mail together with any attachments may contain information of Ribbon Communications Inc. and its Affiliates that is confidential and/or proprietary for the sole use of the intended recipient. Any review, disclosure, reliance or distribution by others or forwarding without express permission is strictly prohibited. If you are not the intended recipient, please notify the sender immediately and then delete all copies, including any attachments.
_______________________________________________ BESS mailing list -- bess@ietf.org To unsubscribe send an email to bess-le...@ietf.org
