Is there a possible reflection & amplification vector here?
* The client sends a reverse traceroute request to the server. This has a 12-byte ICMP header as indicated in 3.1
* The server responds to the client with a traceroute response. This has a 12-byte ICMP header as indicated in 3.2, but also a traceroute payload of 24 bytes as indicated in 3.3
So the total response from client to server has at least +24 bytes beyond the original client request? And a spoofed source address on a reverse traceroute request would then direct the reverse traceroute response to the spoofed victim?
+24 bytes is not a huge amount in terms of amplification, but if this is accurate, is that perhaps worth calling out in the security considerations?
Actually: Would there not also be a slight additional bit of traffic to the spoofed address, in that the actual traceroute probe itself, that is sent from the reverse traceroute server, is also directed towards the spoofed source IP address? The last probe in the series, that has a TTL equal to the distance between the reverse traceroute server and the probe target, would reach the target, but additional probes (with TTL shorter than the distance from server to target) would still be flung from the server across intermediate hops.
E.g. if I spoof a client address that is 15 hops away from the reverse traceroute server, then my single reverse traceroute request would result in:
* 15 probes initiated from the reverse traceroute server toward the spoofed target (with each probe progressing one hop closer to the target)
* one reverse traceroute response that is +24 bytes from my original request, also directed toward the spoofed target
Am I understanding the structure correctly there?