On October 2nd 2020, CVE-2020-15808 was publicly announced, detailing an out-of-bounds memory read/write vulnerability in STM's microcontroller firmware. Any chip containing STM's USB CDC driver library contains the bugged code, which represents a large amount of products on the market. While bugged STM libraries may be bad enough, this problem is much more widespread. Several companies manufacture "clones" of STM chips which, due to mostly identical MMIO (Memory Mapped Input/Output) addresses, fully support the affected STM vendor code. Most clone manufacturers don't offer their own libraries, so developers must either write their own from scratch, or they can use the STM's existing libraries, and most clone manufacturers encourage this.
Armed with this information, I became interested in exploiting and dumping the flash on the "Team Xecuter" SX Core modchip for the Nintendo Switch. The MCU used on the ch
