This draft specifies an extension to ICMP that provides sustainability metrics and data on a per-hop basis to the targeted node.  This data includes information on node power draw, the node components' power draw(s), node network throughput, and environmental certifications.

The security considerations section does exist and defers to RFC 4884 and 8335 in regards to the security of ICMP extensions.  The section also recommends limiting the extension to the internally-facing administrative domain in consideration of privacy by filtering out these sustainability metrics and data.  I agree with these assertions.  However, one attack vector that I could think of is a high-fidelity reporting of power draw for the targeted node's memory, cache, or HSM component then an attacker could perform a remote side-channel attack (i.e., using DPA) during cryptographic operations in order to extract the associated secret key.

General comments:

Thank you for the use-case section.

Editorial comments:

None.