Mem2019 / JsTainter

JsTainter

A framework that performs dynamic taint analysis on JavaScript program.

Install

git clone https://github.com/Mem2019/JsTainter.git # clone JsTainter
cd JsTainter/
git clone https://github.com/Mem2019/jalangi2.git # clone modified jalangi2 framework
cd jalangi2/
npm install # install jalangi2, but dependency should be installed first

You may also need to refer to instructions in https://github.com/Mem2019/jalangi2 to setup dependencies, including mitmproxy and its credential setup.

Usage

Perform Analysis

./run.sh # at JsTainter/ directory

Then change the proxy of the browser to 127.0.0.1:8080, enter the URL of the website you want to analyze. When you think the analysis is finished, press the Jalangi button at the left upper corner, and if you open the console in browser development tools, you can see a JSON is printed, which is the result of the taint analysis.

Visualization

To visualize the taint flow, open visualizer/index.html in browser. The cached JavaScript file of the website is in cache/[domain of the website]/[some hash]/[some hash].js, use load button to load one or more files. Then copy the JSON obtained into the text area, press play to visualize taint flow.