hacnho/protobuf-api-options-dos-poc

Protocol Buffers Api options materialization DoS PoC

This repository contains a benign security research PoC for a .pb artifact that drives repeated-message materialization during api_pb2.Api.ParseFromString(...).

Files:

• control_one_name.pb
• malicious_methods_5000000.pb
• reproduce.py

Observed behavior:

• control artifact:
  • parses successfully with no options entries
• malicious artifact:
  • parses successfully with 5,000,000 options 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-api-options-dos-poc/resolve/main/control_one_name.pb
curl -L -O https://huggingface.co/hacnho/protobuf-api-options-dos-poc/resolve/main/malicious_options_5000000.pb
curl -L -O https://huggingface.co/hacnho/protobuf-api-options-dos-poc/resolve/main/reproduce.py
python3 reproduce.py --control control_one_name.pb --malicious malicious_options_5000000.pb

Public reproduction:

curl -L -O https://huggingface.co/hacnho/protobuf-api-methods-dos-poc/resolve/main/control_one_name.pb
curl -L -O https://huggingface.co/hacnho/protobuf-api-methods-dos-poc/resolve/main/malicious_methods_5000000.pb
curl -L -O https://huggingface.co/hacnho/protobuf-api-methods-dos-poc/resolve/main/reproduce.py
python3 reproduce.py --control control_one_name.pb --malicious malicious_methods_5000000.pb