hacnho/protobuf-codegeneratorrequest-source-file-descriptors-dos-poc

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:

python3 -m pip install protobuf==7.35.1

Public reproduction:

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