| tags: | |
| - security | |
| - proof-of-concept | |
| - protobuf | |
| license: mit | |
| # Protocol Buffers CodeGeneratorRequest source_file_descriptors materialization DoS PoC | |
| This repository contains a benign security research PoC for a `.pb` artifact | |
| that drives repeated-message materialization during | |
| `plugin_pb2.CodeGeneratorRequest.ParseFromString(...)`. | |
| Files: | |
| - `control_one_proto_file.pb` | |
| - `malicious_proto_file_5000000.pb` | |
| - `reproduce.py` | |
| Observed behavior: | |
| - control artifact: | |
| - parses successfully with one `source_file_descriptors` entry | |
| - malicious artifact: | |
| - parses successfully with `5,000,000` `source_file_descriptors` entries | |
| - materially increases peak RSS during normal parse | |
| Tested runtime: | |
| ```bash | |
| python3 -m pip install protobuf==7.35.1 | |
| ``` | |
| Public reproduction: | |
| ```bash | |
| curl -L -O https://huggingface.co/hacnho/protobuf-codegeneratorrequest-source-file-descriptors-dos-poc/resolve/main/control_one_source_file_descriptor.pb | |
| curl -L -O https://huggingface.co/hacnho/protobuf-codegeneratorrequest-source-file-descriptors-dos-poc/resolve/main/malicious_source_file_descriptors_5000000.pb | |
| curl -L -O https://huggingface.co/hacnho/protobuf-codegeneratorrequest-source-file-descriptors-dos-poc/resolve/main/reproduce.py | |
| python3 reproduce.py --control control_one_source_file_descriptor.pb --malicious malicious_source_file_descriptors_5000000.pb | |
| ``` | |
| Public files: | |
| - `https://huggingface.co/hacnho/protobuf-codegeneratorrequest-source-file-descriptors-dos-poc/resolve/main/control_one_source_file_descriptor.pb` | |
| - `https://huggingface.co/hacnho/protobuf-codegeneratorrequest-source-file-descriptors-dos-poc/resolve/main/malicious_source_file_descriptors_5000000.pb` | |
| - `https://huggingface.co/hacnho/protobuf-codegeneratorrequest-source-file-descriptors-dos-poc/resolve/main/reproduce.py` | |