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math_tool's Introduction

MATH - Modified Algorand Tealer Helper

MATH is static analyzer for Teal code. It parses the Teal program, and builds its CFG. This project has been built on top of the great work by Crytic on Tealer.

This tool is a part of the unpublished paper MATH - Finding and Fixing Exploits on Algorand, and runs two detectors by default.

Features

Detectors

Num Check What it Detects Type
1 bSubtract Detect instances of the byte subtraction vulnerability Stateful
2 mathploit Detect instances of the math exploit Stateful

All the detectors are run by default

Printers

  • Print CFG (--print-cfg)

Printers output dot files. Use xdot to open the files (sudo apt install xdot).

How to install

Run

python3 setup.py install

We recommend to install the tool in a virtualenv.

How to run

tealer code.teal

Example

The following shows the CFG from algorand/smart-contracts.

git clone https://github.com/algorand/smart-contracts.git
cd smart-contracts
tealer ./devrel/permission-less-voting/vote_opt_out.teal --print-cfg

Example

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