Changes

| contenthax2 (FailST)

| contenthax2 (FailST)

| Each title has a File System Table (FST) that describes the filesystem. However, its integrity is not checked at runtime by the Wii U. Once the title is installed and has at least one section with hash mode 2 (no runtime checks) all file entries can modified to point to this section and thus bypass runtime file integrity checks of this title. This can be easily used as a secondary entrypoint by replacing the titles binary, leading to abritary code execution. By modifying the cos.xml the application can also run with full permissions, allowing for example JIT or SD Card access. A detailed write up can be found [https://maschell.github.io/homebrew/2020/12/02/failst.html here]

| Each title has a File System Table (FST) that describes the filesystem. However, its integrity is not checked at runtime by the Wii U. Once the title is installed and has at least one section with hash mode 2 (no runtime checks) all file entries can modified to point to this section and thus bypass runtime file integrity checks of this title. This can be easily used as a secondary entrypoint by replacing the titles binary, leading to arbitrary code execution. By modifying the cos.xml the application can also run with full permissions, allowing for example JIT or SD Card access. A detailed write up can be found [https://maschell.github.io/homebrew/2020/12/02/failst.html here]

| Arbitrary title content modification

| Arbitrary title content modification

| None

| None