A UPnP SSDP M-SEARCH request can be used to search a network for UPNP
devices. An M-SEARCH response is roughly 30x the size of the request and
can be distributed across multiple responses from multiple hosts, and
because it utilizes UDP, this can be used to conduct traffic
amplification attacks against other assets, typically in the form of
distributed reflected denial of service (DRDoS) attacks.