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HOMEBREW SWITCH UPDATE

“Unfortunately, this bug affects a significant number of Tegra devices beyond the Switch, and beyond even the X1 included in the Switch,” she wrote. Katherine Temkin, who reported the vulnerability on Github, wrote on her personal site that NVIDIA and other vendors, Nintendo included, were notified of the vulnerability ahead of its public disclosure. For new devices, the correct solution is likely to introduce an new ipatch or new ipatches that limits the size of control request responses.

It is suggested that consumers be made aware of the situation so they can move to other devices, where possible.

HOMEBREW SWITCH UPDATE

Unfortunately, access to the fuses needed to configure the device’s ipatches was blocked when the ODM_PRODUCTION fuse was burned, so no bootROM update is possible.

For a device already in consumer hands, no solution is proposed.

This has to be handled according to the type of device: In this case, the recommended mitigation is to correct the USB control request handler such that it always correctly constrains the length to be transmitted. The kicker for Nintendo, and the relevant bit for anyone who owns a Switch today, can be found at the bottom: More in-depth instructions can be found on Github, although knowing a bit of Python might help with the translation. The exploit isn’t specifically designed for the Switch, but Tegra hardware in general. That ‘fuse’ basically prevents any further modification of code once it’s been initially written to.

Developed by one of the members behind ReSwitched, a community site designed to document the Switch’s processes and enable the development of homebrew software, the exploit allows a user to execute code on the Tegra chip’s boot and power management processor before a fuse kicks in.