Misaligned memory access in tensor FQN parsing via crafted .pte external tensor
Vulnerability
ExecuTorch .pte model file that triggers a crash during Program::load_method().
CWE: CWE-476 (NULL Pointer Dereference) / CWE-125 (Out-of-bounds Read) Tested on: ExecuTorch commit a17428b
Reproduction
git clone https://github.com/pytorch/executorch
cd executorch && git checkout a17428b
git submodule update --init
mkdir cmake-out && cd cmake-out
cmake .. -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ \
-DCMAKE_C_FLAGS="-fsanitize=address,undefined -fno-omit-frame-pointer" \
-DCMAKE_CXX_FLAGS="-fsanitize=address,undefined -fno-omit-frame-pointer" \
-DEXECUTORCH_BUILD_EXTENSION_DATA_LOADER=ON \
-DEXECUTORCH_BUILD_EXTENSION_MODULE=ON
cmake --build . -j$(nproc)
# Run with the PoC file
./executor_runner --model_path poc.pte
Files
poc.pte— Crafted .pte file (668 bytes) that triggers the crash
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