README.md

# Caffe Integer Overflow PoC

Proof-of-concept files for multiple signed integer overflow vulnerabilities in [BVLC/caffe](https://github.com/BVLC/caffe).

## Files

| File | Description |
|------|-------------|
| `dilation_overflow_dos.prototxt` | Crafted model: dilation=1073741824 triggers signed overflow → DoS crash |
| `silent_overflow_bypass.prototxt` | Crafted model: dilation=1073741824, kernel=5 silently bypasses all CHECKs |
| `pad_overflow_pooling.prototxt` | Crafted model: pad=1073741824 triggers pooling layer overflow |
| `caffe_overflow_poc.cpp` | Standalone C++ PoC reproducing the exact vulnerable arithmetic |
| `ubsan_output.txt` | UBSan output showing 11 signed-integer-overflow violations |

## Reproduction

```bash
# Compile with UBSan
clang++ -fsanitize=undefined -fsanitize-recover=all -O0 -o poc caffe_overflow_poc.cpp

# Run
./poc
```

## Affected Code

- `src/caffe/layers/conv_layer.cpp` — `compute_output_shape()`
- `src/caffe/layers/base_conv_layer.cpp` — `LayerSetUp()`, `Reshape()`
- `src/caffe/layers/pooling_layer.cpp` — `Reshape()`
- `src/caffe/util/im2col.cpp` — `im2col_cpu()`, `im2col_nd_core_cpu()`

## Responsible Disclosure

This repository is gated for responsible disclosure purposes.