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SSDP is also used for inexpensive network compliant devices introduced in general households, general users who are not familiar with the technology leave them inappropriately set or leave as enabled.
Especially devices for gaming such as PlayStation and, they detect if the network is UPnP-supported and automatically configures itself without manual human intervention. Hence, whether the local network has a connected UPnP appliance or not the service is exposed on the network and continue to listen.
The vulnerability without updating the software is real, as a stack like UPnP requires constant patching. One such attacks against UPnP is SSDP DDoS attack using reflection method is an exploit that puts a load by sending an inquiry that disguised an attack target as a transmission source to the device and sending the response back to the attack target.
As SSDP returns a response that is about 30 times as large as the inquiry, it is more efficient to send a large amount of data the target by misusing corresponding devices rather than directly transmitting data to attack targets.
Most attacks are done from port used by SSDP, with clever threat actors using a malicious payload was from a randomized port.
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