Nintendo · Report #3174987
Man-in-the-middle through broken SSL certificate verification
Validstatus
mediumseverity
53upvotes
8 Aug 2025disclosed
Summary
A logic flaw in the ssl sysmodule made it possible to provide a forged server certificate to applications. This would allow an attacker to read and/or modify traffic that is transmitted between the console and a server, which can leak secret information and opens up new attack vectors to the system. All applications that use the nn::ssl::Context::ImportServerPki function were affected.
More details about the vulnerability can be found here: https://reversing.live/sslbypass.html
How it was found
The write-up for this report has not been downloaded yet, or the program disclosed it without one. Read it on HackerOne.