Why is Brave issuing UPnP discovery requests?

privacy
#1

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Description of the issue:

Start browser on a blank page and wait. Very soon, see in a network activity log that the browser is issuing UPnP discovery requests. Specifically:
UDP requests to port 1900 and IP address 239.255.255.250
Why???

Steps to Reproduce (add as many as necessary): 1. 2. 3.

start browser and wait a minute. No need to look at websites. Then look at the connections log from the Windows Firewall Control program by MalwareBytes.

Actual Result (gifs and screenshots are welcome!):
here is a screen shot


Expected result:
no UPnP requests from the browser

Reproduces how often:
every time

Brave Version(about:brave):
Brave for Windows version 0.60.47 based on Chromium 72

Reproducible on current live release (yes/no):
yes

Additional Information:

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#2

Steve Gibson said here


that “… the Chrome browser has some default behavior of scanning its local network for any available and listening Chromecast devices. … Chromecast’s “device discovery” service listens and accepts connections on TCP port 8009, and it establishes a TLS connection to the client connecting to it using a self-signed cert. So when Chrome is started up, it sends out a “are there any Chromecast devices out there?” localbroadcast. Any powered up and online Chromecast device will head the call and reply. Then the Chrome browser will attempt to bring up a TLS connection at the responding device’s IP over port 8009.”

This sounds like the UPnP requests I see on UDP port 1900.
Brave should not be looking for Google Chromecast devices.

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closed #3

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