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KextRW
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macOS kext with kernel R/W, kalloc and kcall
Download README (.md)
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Download README
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README.md
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KextRW
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Download (.md)
# KextRW A macOS kernel extension offering several features useful for security/vulnerability research against XNU. The features provided by this kernel extension include: * Virtual kernel read/write * Physical read/write * Getting the kernel base and slide * Kernel memory allocation and freeing * Kernel call primitive * Address translation The codebase is originally based on [IOKernelRW](https://github.com/Siguza/IOKernelRW), where you can find installation instructions, as they will be the same for this project. Any binary that wishes to create a userclient for this kernel extension must possess the `com.apple.security.alfie.kext-rw` entitlement. An easy-to-use test program can be found in the `tests/` folder, but the offsets and addresses are specific to my machine. You can find the path to your kernelcache by running `kmutil inspect` - it will be printed at the top. This will be necessary if you would like to update the offsets and addresses in `kextrw_test.c`. I have not tested this on anything other than macOS 15.2. Building the project using `make all` will output a static `libkextrw` library and a header file in the `build/` directory, which you can then use to build projects on top of the primitives provided by the kernel extension. The `kextrw_test.c` file in the `tests/` directory offers an example of this use case.
