Smartian

Smartian is a grey-box fuzzer for Ethereum smart contracts. Smartian leverages static and dynamic data-flow analyses to enhance the effectiveness of fuzzing. The technical details of Smartian can be found in our paper "Smartian: Enhancing Smart Contract Fuzzing with Static and Dynamic Data-Flow Analyses" published in ASE 2021.

Installation

Smartian is written in F#, so you have to install .NET to run Smartian. Installation step differs for each Linux distribution, so please refer to this link and install net5.0. Then, you can simply clone and build Smartian as follow.

$ git clone https://github.com/SoftSec-KAIST/Smartian
$ cd Smartian
$ git submodule update --init --recursive
$ make

Usage

You can fuzz a smart contract with Smartian by providing its EVM bytecode and ABI specification as follow. Here, -t option specifies the time limitation in seconds. The output test cases and bug-triggering inputs will be stored in the directory specified by -o option.

$ dotnet build/Smartian.dll fuzz -p <bytecode file> -a <abi file> -t <time limit> -o <output dir>

The output directory will have two subdirectories. First, testcase directory will contain inputs that increased edge coverage during fuzzing. You can use these inputs to measure code coverage achievement. Second, bug directory will contain inputs that triggered bug. The file names of bug-triggering inputs will be tagged with abbreviated bug class name (e.g., 'RE' for reentrancy bug). For the list of used abbreviations, please refer to our paper.

Note that the generated test inputs are in JSON format, and they contain necessary information required to reproduce the transactions. You can replay these files against the target contract with the following command.

$ dotnet build/Smartian.dll replay -p <bytecode file> -i <test case directory>

You may also check other command-line options of Smartian by running dotnet build/Smartian.dll fuzz --help and dotnet build/Smartian.dll replay --help.

Artifact

We also publicize the artifacts to reproduce the experiments in our paper. Please check our Smartian-Artifact repository.

Citation

You can site our paper with the following bibtex entry. The page field will be updated later.

@INPROCEEDINGS{choi:ase:2021,
  author = {Jaeseung Choi and Doyeon Kim and Soomin Kim and Gustavo Grieco and Alex Groce and Sang Kil Cha},
  title = {{Smartian}: Enhancing Smart Contract Fuzzing with Static and Dynamic Data-Flow Analyses},
  booktitle = {Proceedings of the International Conference on Automated Software Engineering},
  year = 2021
}